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European Journal of Psychotraumatology
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Distinguishing PTSD, Complex PTSD, and Borderline Personality Disorder: A latent class analysis
Marylène Cloitre, Donn W. Garvert, Brandon Weiss, Eve B. Carlson & Richard A. Bryant
To cite this article: Marylène Cloitre, Donn W. Garvert, Brandon Weiss, Eve B. Carlson & Richard A. Bryant (2014) Distinguishing PTSD, Complex PTSD, and Borderline Personality Disorder: A latent class analysis, European Journal of Psychotraumatology, 5:1, 25097, DOI: 10.3402/ ejpt.v5.25097
To link to this article: https://doi.org/10.3402/ejpt.v5.25097
© 2014 Marylène Cloitre et al. View supplementary material
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CLINICAL RESEARCH ARTICLE
Distinguishing PTSD, Complex PTSD, and Borderline Personality Disorder: A latent class analysis
Marylène Cloitre1,2*, Donn W. Garvert1, Brandon Weiss1,3, Eve B. Carlson1
and Richard A. Bryant4
1National Center for PTSD, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA; 2Department of Psychiatry and Child & Adolescent Psychiatry, New York University Medical Center, New York, USA; 3Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Palo Alto, CA, USA; 4School of Psychology, University of New South Wales, Sydney, NSW, Australia
Background: There has been debate regarding whether Complex Posttraumatic Stress Disorder (Complex
PTSD) is distinct from Borderline Personality Disorder (BPD) when the latter is comorbid with PTSD.
Objective: To determine whether the patterns of symptoms endorsed by women seeking treatment for child-
hood abuse form classes that are consistent with diagnostic criteria for PTSD, Complex PTSD, and BPD.
Method: A latent class analysis (LCA) was conducted on an archival dataset of 280 women with histories of
childhood abuse assessed for enrollment in a clinical trial for PTSD.
Results: The LCA revealed four distinct classes of individuals: a Low Symptom class characterized by low
endorsements on all symptoms; a PTSD class characterized by elevated symptoms of PTSD but low endorse-
ment of symptoms that define the Complex PTSD and BPD diagnoses; a Complex PTSD class characterized by
elevated symptoms of PTSD and self-organization symptoms that defined the Complex PTSD diagnosis but
low on the symptoms of BPD; and a BPD class characterized by symptoms of BPD. Four BPD symptoms were
found to greatly increase the odds of being in the BPD compared to the Complex PTSD class: frantic efforts to
avoid abandonment, unstable sense of self, unstable and intense interpersonal relationships, and impulsiveness.
Conclusions: Findings supported the construct validity of Complex PTSD as distinguishable from BPD. Key
symptoms that distinguished between the disorders were identified, which may aid in differential diagnosis
and treatment planning.
Keywords: Complex PTSD; posttraumatic stress disorder; Borderline Personality Disorder; WHO; ICD-11
*Correspondence to: Marylène Cloitre, National Center for PTSD Dissemination and Training Division,
VAPAHCS, 795 Willow Road, Menlo Park, CA 94025, USA, Email: Marylene.cloitre@nyumc.org
For the abstract or full text in other languages, please see Supplementary files under Article Tools online
Received: 3 June 2014; Revised: 22 July 2014; Accepted: 18 August 2014; Published: 15 September 2014
T here has long been debate about whether Complex
Posttraumatic Stress Disorder (Complex PTSD)
is distinct from Borderline Personality Disorder
(BPD) comorbid with PTSD. Part of the difficulty in this
evaluation has been the lack of clear and consistent
characterization of Complex PTSD. The World Health
Organization (WHO) Working Group on the Classification
of Stress-Related Disorders has proposed the inclusion
of Complex PTSD as a new diagnosis related to but sepa-
rate from PTSD (Maercker et al., 2013). Both of these
disorders are viewed as distinct and separate from BPD.
An emerging and accumulating empirical literature is
demonstrating consistent and clear differences between
ICD-11 PTSD and Complex PTSD. In addition, it is
important to determine the construct validity of Complex
PTSD as empirically distinct from BPD particularly
among those with a trauma history. This investigation
evaluated whether ICD-11 Complex PTSD could be dis-
tinguished from DSM-IV BPD in a treatment-seeking
population of women with childhood abuse.
The WHO proposed that the development of ICD-11
be guided by the principle of clinical utility. Characteris-
tics of clinical utility include the organization of disorders
that are consistent with clinicians’ mental health taxo-
nomies, that contain a limited number of symptoms so
that they can be easily recalled and used in the field, and
that are based on distinctions important for manage-
ment and treatment (Reed, 2010). The distinction between
PSYCHOTRAUMATOLOGY EUROPEAN JOURNAL OF
�
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1
Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097 (page number not for citation purpose)
ICD-11 PTSD and Complex PTSD are consistent with
these guidelines (see Cloitre, Garvert, Brewin, Bryant, &
Maercker, 2013; Maercker et al., 2013). For example,
ICD-11 PTSD is construed as a fear-based disorder and
symptoms are limited to and consistent with fear reactions
and consequent avoidance and hypervigilence. In contrast,
Complex PTSD has been described as typically associated
with chronic and repeated traumas and includes not only
the symptoms of PTSD but also disturbances in self-
organization reflected in emotion regulation, self-concept
and relational difficulties (see Cloitre et al., 2013) a symp-
tom profile that has been demonstrated as associated
with prolonged trauma (Briere & Rickards, 2007).
Three studies have found evidence supporting the vali-
dity of the ICD-11 PTSD versus Complex PTSD distinction
(see Table 1 for description of the diagnoses). Recently, in
order to evaluate whether PTSD and Complex PTSD
could be empirically distinguished from each other, Cloitre
and colleagues (2013) performed a latent profile analysis
(LPA) on assessment data from 302 treatment-seeking
individuals with diverse trauma histories, ranging from
single events (e.g., 9/11 attacks) to sustained exposures
(e.g., childhood or adult physical and/or sexual abuse).
The results were consistent with the ICD-11 formulation
for Complex PTSD, with the best fitting LPA model
delineating three classes of individuals: (1) a Complex
PTSD class, with high levels of both PTSD symptoms as
well as disturbances in self-organization related to affect
regulation problems, negative self-concept, and relational
difficulties; (2) a PTSD class, with high levels of PTSD
symptoms but relatively low on the disturbances in self-
organization that define Complex PTSD; and (3) a class
Table 1. Symptom profile for each diagnosis and items used in the LCA analyses
Symptoms for each diagnoses
ICD-11 PTSD ICD-11 CPTSD DSM-IV BPD Items
Re-experiencing Re-experiencing
Flashbacks Flashbacks CAPS 1: Unwanted memories of the event
Nightmares Nightmares CAPS 2: Recurrent distressing dreams of the event
Avoidance Avoidance
Thoughts Thoughts CAPS 6: Avoid thoughts, feelings or conversations
People, places,
activities
People, places, activities CAPS 7: Avoid activities, places, or people
Sense of threat Sense of threat
Hypervigilance Hypervigilance CAPS 16: Being especially alert constantly on guard
Startle Startle CAPS 17: Strong startle reactions
Emotion regulation
Anger BSI 13: Temper outburst that you could not control
Hurt Feelings BSI 20: Your feelings being easily hurt
Negative self-concept
Worthless BSI 50: Feeling of worthlessness
Guilty BSI 52: Feelings of guilt
Interpersonal problems
Not close BSI 44: Never feeling close to another person
Feel disconnected CAPS 10: Feeling distant or cut off from other people
Frantic SCID-II 90: Frantic efforts to avoid abandonment
Unstable relationships SCID-II 91: Unstable and intense relationships with alternating
extremes of idealization and devaluation
Unstable sense of self SCID-II 92: Markedly and persistently unstable sense of self
Impulsiveness SCID-II 96: Impulsiveness that is potentially self-damaging
Self-harm SCID-II 97: Recurrent suicidal behavior, gestures, or threats,
or self-mutilating behavior
Mood changes SCID-II 99: Affective instability due to reactivity to mood
Empty SCID-II 100: Chronic feelings of emptiness
Temper SCID-II 101: Frequent displays of anger, constant anger,
recurrent physical fights
Paranoid/dissociation SCID-II 104: Transient, stress-related paranoid ideation or
severe dissociative symptoms
Marylène Cloitre et al.
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Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097
relatively low on symptoms of both PTSD and Complex
PTSD. Notably, these identified classes were identical
when including an additional 86 participants with BPD,
providing further support for the stability of the identified
classes. Cloitre et al. (2013) also found that chronic trauma
was more predictive of Complex PTSD than PTSD and
that Complex PTSD resulted in significantly greater func-
tional impairment than PTSD.
Elklit, Hyland, and Shevlin (2014) replicated the find-
ings of Cloitre and colleagues (2013), performing a latent
class analysis (LCA) on three separate samples of trauma-
exposed Danish individuals who experienced primary
traumas of bereavement, sexual assault, and physical
assault. The investigators found that the LCA model with
the best fit for each sample consisted of three classes of
individuals identical to those identified by Cloitre et al.
(2013). Lastly, Knefel and Lueger-Schuster (2013) per-
formed confirmatory factor analysis (CFA) on data from
226 Austrian adults who had experienced institutional
abuse, defined as physical, sexual or emotional abuse
by individuals representing institutions responsible for
the care of children (i.e., Catholic Church, foster care).
Results indicated that individuals diagnosed with Com-
plex PTSD had experienced significantly longer exposure
to traumatic situations and that the theoretically derived
CFA model demonstrated good model fit. Overall, these
studies provide substantial support for the construct vali-
dity of Complex PTSD across international samples of
individuals exposed to diverse traumatic events, demon-
strating that it is a diagnostic entity distinct from PTSD
and supporting the recommendations of the ICD-11
proposal.
The argument that Complex PTSD is an amalgam of
PTSD and BPD has been built on reports of the relatively
high comorbidity between PTSD and BPD. For example,
using data from the National Epidemiologic Survey on
Alcohol and Related Conditions (NESARC), a nationally
representative sample of United States population, Pagura
and colleagues (2010) found that 24% of individuals with
lifetime PTSD also met criteria for BPD, 30% of indi-
viduals with BPD also met criteria for lifetime PTSD,
and 2% had comorbid PTSD and BPD. Also utilizing
NESARC data, Grant and colleagues (2008) found that
29% of individuals who currently met criteria for PTSD
in the past 12 months also met criteria for lifetime BPD,
and 32% of individuals with lifetime BPD met criteria for
12-month PTSD. In clinical samples, the rates of comor-
bidity are higher. PTSD patients are reported to have
BPD comorbidity ranging from 37 to 68% (Heffernan &
Cloitre, 2000; Zlotnick, Franklin, & Zimmerman, 2002)
and conversely, among BPD patients 25�58% are diag-
nosed with comorbid PTSD (Golier et al., 2003; Harned,
Rizvi, & Linehan, 2010; Zanarini et al., 1998).
Despite these high rates of comorbidity, the key clinical
features of Complex PTSD and BPD differ and lead to
different treatment implications, a consequence of signifi-
cance when considering the clinical utility of diagnostic
formulation. Complex PTSD includes PTSD symptoms
and, accordingly, treatment highlights the amelioration
of the trauma memory as a key goal (Cloitre et al., 2011).
In contrast, the key impairing features of BPD are self-
injurious and suicidal behaviors, and treatment activities
focus on the resolution of these behaviors (e.g., Linehan,
1993). There are several other ways in which the profile of
Complex PTSD differs from that of BPD. First, it should
be noted that BPD does not require a traumatic stressor
for diagnosis and PTSD symptoms may or may not be
present. Rather, BPD is characterized by fear of abandon-
ment, shifting self-image or self-concept, shifting ideali-
zation and devaluation in relationships, and frequent
impulsive and suicidal behaviors (see Table 1). In Complex
PTSD, as proposed in ICD-11, the fear of abandonment
is not a requirement of the disorder, self-identify is
consistently negative rather than shifting and relational
disturbances highlight chronic avoidance of relationships
rather than sustained chaotic engagement. While emotion
regulation difficulties are central to both Complex PTSD
and BPD, their expression is quite different. In Complex
PTSD they predominantly include emotional sensitivity,
reactive anger and poor coping responses (e.g., use of
alcohol and substances). In BPD, some of the preceding
may be observed, but the criteria, perhaps the defining
characteristics of the disorder, include suicide attempts
and gestures as well as self-injurious behaviors, events
which occur much less frequently in complex forms of
PTSD than in BPD samples (e.g., Zlotnick et al., 2002).
Given these identified differences in diagnostic formula-
tion and their treatment implications, empirical evaluation
of Complex PTSD and BPD in a symptom-by-symptom
manner is important.
The purpose of the current study was to determine
whether the symptoms endorsed by women seeking treat-
ment for childhood abuse form classes that are consistent
with diagnostic criteria for PTSD, Complex PTSD, and
BPD (see Table 1). We hypothesized that analyses would
reveal at least three distinct classes of individuals with the
following symptom profiles: (1) high levels of ICD-11
PTSD symptoms but not symptoms of Complex PTSD or
BPD, (2) high levels of Complex PTSD symptoms (PTSD
plus emotion regulation, negative self-concept and inter-
personal problems) but not BPD symptoms; (3) high
levels of BPD symptoms with an admixture of trauma-
related symptoms (e.g., PTSD, CPTSD symptoms).
Methods
Participants and procedures The data for these analyses were obtained from an archi-
val set of measures administered as part of an assessment
procedure for a randomized controlled trial for PTSD
PTSD, Complex PTSD, and BPD
Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097 3 (page number not for citation purpose)
related to childhood abuse (n�310) (see Cloitre et al.,
2010). The data are a subset of individuals for whom com-
plete measures of PTSD, BPD, general psychopathology,
and functional impairment were available (n�280).
Participants had a mean age of 37.13 (SD �10.86)
years. The entire sample was female and 40% identified
as Caucasian (40.4%, n�113), followed by African-
American (26.4%, n�74), Hispanic (18.6%, n�52), Asian
(3.9%, n�11), other (8.6%, n�24), and unreported
(2.1%, n�6). Marital status of the sample was as follows:
54.3% (n�152) reported being single, married (11.1%,
n�31), divorced or separated (16.1%, n�45), living with
a significant other (15.7%, n�44), widowed (0.7%, n�2),
and unreported (2.1%, n�6). College graduation or com-
pletion of some college was reported by 64.3% (180),
postgraduate education was reported by 24.3% (68), high
school graduation or some high school was reported by
9.3% (26), and education level was unavailable for 2.1%
(6). The majority of participants reported some employ-
ment with 41.4% (116) employed full-time (35� hours
per week) and 23.9% (n�67) employed part-time (B35
hours per week).
Frequency of traumas were as follows: childhood sexual
abuse (CSA) (65.1%), childhood physical abuse (CPA)
(80.8%), neglect (46.4%), emotional abuse (80.4%), 35.9%
were not living with their mother before the age of 18,
adulthood sexual assault (ASA) (49.6%), and adult-
hood physical assault (APA) (26.0%). All individuals
had experienced either CPA or CSA.
Measures
Clinician Administered PTSD Scale
The Clinician Administered PTSD Scale (CAPS) for
DSM-IV PTSD is a well-validated clinician administered
interview (see Weathers, Keane, & Davidson, 2001) that
evaluates the presence and severity of the 17 DSM-IV
PTSD symptoms over the past month with separate five-
point scales for frequency (ranging from 0 � ‘‘never’’ to
4 � ‘‘almost daily’’) and intensity (ranging from 0 � ‘‘none’’ to 4 � ‘‘extreme’’). The CAPS items used for
current analyses are listed on Table 1. An item with a
frequency score of 1 (‘‘once or twice in the past month’’)
or higher and an intensity score of 2 (‘‘moderate’’) or
higher was considered positive for that symptom follow-
ing guidelines suggested by Weathers et al. (2001).
Brief Symptom Inventory
The Brief Symptom Inventory (BSI) is a 53-item self-
report psychological symptom inventory with nine pri-
mary symptom dimensions. The measure assesses how
much a problem bothered or distressed a person using a
5-point Likert scale ranging from 0 � ‘‘not at all’’ and
4 � ‘‘extremely’’. The BSI has shown high convergent
and construct validity (Derogatis & Melisaratos, 1983).
The BSI items used for the current analyses are listed on
Table 1. An item score of 2 (‘‘moderately’’) or higher was
considered positive for that symptom.
Structured Clinical Interview-II Borderline Personality Disorder module
The Structured Clinical Interview for Axis II Disorders
(SCID-II) DSM�IV BPD Module has nine items where
a score of 1�absent or false, 2�subthreshold and
3�threshold or true (First, Spitzer, Gibbon, & Williams,
1994). The items used for the current analyses are listed
on Table 1. An item score of 3 was considered positive for
that symptom.
Social Adjustment Scale-Self Report
The Social Adjustment Scale-Self Report (SAS-SR;
Weissman & Bothwell, 1976) was utilized to measure func-
tional impairment. The SAS-SR consists of 42 Likert-
type items, which assess the level of functioning over the
past 2 weeks for six domains: work, social and leisure
activities, relationships with extended family, role as a
marital partner, parental role, and role within the family
unit. A mean score can be calculated for each of the six
domains, as well as one overall mean score, based on the
total number of items relevant to the responder. Higher
scores indicate greater impairment. The SAS-SR has
demonstrated strong psychometric properties among com-
munity and clinical samples (e.g., Weissman & Bothell,
1976).
Statistical analyses
Latent class analysis
The model fit for the optimal number of classes that were
examined were the Lo-Mendell-Rubin adjusted likeli-
hood ratio test (LMR-A), the bootstrap likelihood ratio
test (BLRT), the Bayesian Information Criterion (BIC),
the Sample-Size Adjusted BIC (SSA-BIC), and the Akaike
Information Criterion (AIC). In a simulation study, the
BLRT was shown to outperform the LMR-A and the
BIC (among other measures of model fit) in selecting
the number of classes (Nylund, Asparouhov, & Muthen,
2007). Since there is not a clear-cut decision rule on how
to select the best fitting model, we ranked ordered the
importance of fit indices as follows: BLRT, BIC, SSA-
BIC, AIC, and then the LMR-A. The general practice of
LCA is to test the fit of a two-class model and system-
atically increase the number of classes until adding more
classes is no longer warranted. The LMR-A and the
BLRT compare the fit of the specified class solution to
models with one less class. A pB0.05 suggests that the
specified model provides a better fit to the data relative to
the model with one less class. A total of 21 symptoms
(coded dichotomously as present or not) were used in
the LCA, 6 representing the ICD-11 PTSD symptoms,
6 representing the self-organization symptoms unique
to Complex PTSD), and 9 representing the SCID-II1
Marylène Cloitre et al.
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Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097
symptoms of BPD (see Table 1). The LCA models were
estimated using robust maximum likelihood method with
400 initial stage random starts and 80 final stage opti-
mizations to determine if the best log-likelihood value
was obtained and replicated. Finally, 50 bootstrap draws
were used in the BLRT.
Descriptive statistics
Chi-square tests and ANOVAs were performed to assess
differences in sociodemographic characteristics, trauma
history, and symptom severity across the classes identi-
fied in the LCA. Descriptive statistics were computed
based on valid (non-missing) data.
Results
Latent class analysis
The fit indices of the different class models examined are
shown in Table 2. The two-class model yielded a signi-
ficant LMR-A and BLRT result at pB0.05. The three-
and four-class models both yielded a significant BLRT
result at pB0.05, but not a significant LMR-A result.
A five-class model was examined, but the best log-
likelihood value was not replicated, and it was not con-
sidered for the final model, as the p-value may not be
trustworthy due to local maxima. The four-class model
did not have the lowest BIC value, but it was selected over
the two- and three-class models because it was the model
with the largest number of classes that had a significant
and trustworthy BLRT result, had the lowest SSA-BIC
value, and had the lowest AIC value of the models consi-
dered. The three- and four-class models were examined
closely, as they both could have legitimate arguments for
being selected. However, based on all of the fit indices
examined and on the interpretability of the symptom
profiles of the classes (consistent with study hypotheses),
the four-class model was selected.
The pattern of symptom endorsement for all four classes
is presented in Fig. 1. The four classes were compared
on the 21 symptoms that were used to determine class
membership in order to provide descriptive labels for
each class. The Low Symptom class had relatively low
levels of all symptoms across all domains. The PTSD class
had generally high levels of PTSD symptoms, but relati-
vely low levels of self-organization and BPD symptoms.
The CPTSD class had high levels of PTSD and self-
organization symptoms, but relatively low levels of BPD
symptoms. The BPD class had a high percentage of BPD
symptoms as well as self-organization disturbances and
PTSD symptoms.
The average probability of latent class membership in
the four-class model was acceptable at 0.91 for the Low
Symptom class, 0.92 for the PTSD class, 0.87 for the
CPTSD class, and 0.91 for the BPD class, which implies
acceptable discrimination between the classes. An accep-
table entropy value probability of 0.81 lends support to
this result by suggesting adequate latent class separation.
Overall, 20.4% (n�57) of participants were classified
into the Low Symptom class, 25.7% (n�72) into the
PTSD class, 27.5% (n�77) into the CPTSD class, and
26.4% (n�74) into the BPD class.
Sociodemographic and trauma history characteristics
ANOVA and Chi-square analyses were performed to assess
differences in sociodemographic characteristics, trauma
history, and symptom severity across the classes identi-
fied in the LCA. Results shown in Table 3 indicate that
the four classes did not differ by age, ethnicity, or employ-
ment status. The classes also did not differ in the rates of
types of childhood or adulthood interpersonal traumas,
with the exception that CSA was reported more fre-
quently in the CPTSD class than in the Low Symptom
and BPD classes. Total number of different types of
traumatic experiences did not differ across classes.
Symptom characteristics
The rates of probable disorders (ICD-11 PTSD, ICD-11
CPTSD and BPD) as well as the percent of endorsed
symptom characteristics for all 21 symptoms across the
four classes are presented in Table 4. Overall, 53.9%
(n�151) had a PTSD diagnosis, 38.2% (n�107) had a
CPTSD diagnosis, and 29.3% (n�82) had a BPD
diagnosis. Of those with a BPD diagnosis, majority also
had a PTSD diagnosis (54.9%, n�45) and 45.1% (n�37)
had a CPTSD diagnosis. In the Low Symptom class, no
one met criteria for either PTSD or CPTSD while 12%
Table 2. Latent class models and fit indices
Model Log-likelihood BIC SSA-BIC AIC Entropy LMR-A p-value BLRT p-value
2 classes �3523.010 7288.315 7151.965 7132.020 0.781 0.029 B0.001
3 classes �3433.024 7232.310 7026.199 6996.048 0.817 0.066 B0.001
4 classes �3382.025 7254.278 6978.406 6938.051 0.808 0.401 B0.001
5 classes �3338.211 7290.613 6944.981 6894.421 0.848 0.639 B0.001a
Note. BIC, Bayesian Information Criterion; SSA-BIC, Sample-Size Adjusted BIC; AIC, Akaike Information Criterion; LMRA-A, Lo-Mendell-
Rubin adjusted likelihood ratio test; BLRT, bootstrap likelihood ratio test. aThe best log-likelihood value was not replicated in 32 out of 50 bootstrap draws. The p-value may not be trustworthy due to local maxima.
PTSD, Complex PTSD, and BPD
Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097 5 (page number not for citation purpose)
met criteria for BPD. The most common symptoms were
unstable relationships, mood changes and feeling empty.
Of individuals in the PTSD class, 68% met criteria for
PTSD, but only 19.4% met criteria for CPTSD and 1.4%
met criteria for BPD. Of individuals in the CPTSD class,
77.9% met criteria for CPTSD but only 7.8% met criteria
for BPD. Of those in the BPD class, 91.9% met DSM-IV
BPD diagnosis. Overall, the DSM-IV BPD diagnosis fit
very few of the individuals in the CPTSD (7.8%) class but
the large majority of the BPD class (91.9%).
A review of the individual items indicates that,
consistent with the graphic depiction provided in Fig. 1,
the BPD class had a lower rate of endorsement of the
ICD-11 PTSD symptoms across all items as compared to
the CPTSD class. The rates were significantly lower for
nightmares and avoidance of trauma-related thoughts.
Endorsement of the individual items reflecting disturban-
ces in self-organization by the BPD class members was
similar to that of the CPTSD class. However, only 44.6%
of the BPD class met criteria for CPTSD suggesting that
Fig. 1. Symptom endorsement of Complex PTSD and BPD items by class.
Table 3. Demographic and trauma characteristics of the classes
Characteristics
Class 1 Low Symptom
n�57
Class 2 PTSD
n�72
Class 3 CPTSD
n�77
Class 4 BPD
n�74
Significance
test
Age 37.91 (10.17) 36.21 (10.64) 36.95 (10.42) 37.63 (12.10) NS
Race (% white) 44.4% 42.9% 33.8% 45.2% NS
Employed (FT or PT) 66.0% 71.0% 68.4% 64.4% NS
CSA 54.5% 66.7% 80.5% 55.4% p�0.003
3�1, 4
CPA 80.0% 82.9% 81.8% 78.4% NS
Neglect 34.5% 47.1% 54.5% 45.9% NS
Emotional abuse 78.2% 75.7% 79.2% 87.8% NS
Any childhood abuse 98.2% 98.6% 97.4% 95.9% NS
ASA 38.9% 46.4% 57.1% 52.7% NS
APA 29.6% 18.8% 32.5% 23.3% NS
Any adult assaults 53.7% 55.9% 72.7% 65.8% NS
Both child and adult events 51.9% 55.9% 71.4% 63.5% NS
Note. All tests were Chi-square tests with 3 degrees of freedom.
Marylène Cloitre et al.
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Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097
individuals did not consistently endorse the CPTSD symp-
toms across all three categories of disturbance (emotion
dysregulation, negative self-concept, interpersonal pro-
blems) sufficient to complete the CPTSD profile. Indeed,
individuals in the BPD class were more likely to meet
criteria for PTSD (54%) than CPTSD.
The CPTSD class had significantly lower endorsement
of all the BPD symptoms than the BPD with the excep-
tion of feelings of emptiness. The CPTSD class was more
similar to the PTSD class in regard to endorsement of
BPD symptoms. The two classes did not differ from each
other on the BPD symptoms in seven out of nine symp-
toms, with the exception of unstable relationships and
mood changes, which were both endorsed at higher rates
in the CPTSD class than the PTSD class. Notably, almost
half of the BPD class members endorsed self-harm/
Table 4. Frequencies of endorsement for ICD-11 PTSD, CPTSD, and DSM-IV BPD items
Symptoms
Class 1 Low symptoms
(n�57)
Class 2 PTSD
(n�72)
Class 3 CPTSD
(n�77)
Class 4 BPD
(n�74)
Significant pairwise
post-hoc comparisons
ICD-11 PTSD diagnosis 0.0% 68.1% 80.5% 54.1% 2, 3, 4�1
3�4
Re-experiencing
Flashbacks 15.8% 80.6% 80.5% 75.7% 2, 3, 4�1
Nightmares 3.5% 45.8% 70.1% 41.9% 2, 3, 4�1
3�2, 4
Avoidance
Thoughts 10.5% 90.3% 89.6% 58.1% 2, 3, 4�1
2, 3�4
People, places, or activities 10.5% 66.7% 67.5% 50.0% 2, 3, 4�1
Sense of threat
Hypervigilance 21.1% 70.8% 75.3% 63.5% 2, 3, 4�1
Startle 26.3% 51.4% 70.1% 60.8% 2, 3, 4�1
ICD-11 CPTSD diagnosis 0.0% 19.4% 77.9% 44.6% 3�1, 2,4
4�1, 2
Affect regulation problems
Angry 28.1% 23.6% 54.6% 51.4% 3, 4�1, 2
Hurt feelings 54.4% 51.4% 97.4% 87.8% 3, 4�1, 2
Negative self-concept
Worthless 40.4% 20.8% 93.5% 87.8% 3, 4�1, 2
Guilty 54.4% 43.1% 92.2% 81.1% 3, 4�1, 2
Interpersonal problems
Not close 36.8% 29.2% 83.1% 70.3% 3, 4�1, 2
Feel disconnected 59.7% 76.4% 98.7% 85.1% 3, 4�1
3�2, 4
DSM-IV BPD diagnosis 12.3% 1.4% 7.8% 91.9% 4�1, 2, 3
Frantic 19.3% 15.3% 11.7% 63.5% 4�1, 2, 3
Unstable relationships 43.9% 8.3% 33.8% 83.8% 4�1, 2, 3
1, 3�2
Unstable sense of self 21.1% 2.8% 14.3% 67.6% 4�1, 2, 3
1�2
Impulsiveness 26.3% 16.7% 22.1% 73.0% 4�1, 2, 3
Self-harm 0.0% 16.7% 14.3% 48.7% 4�1, 2, 3
2, 3�1
Mood changes 40.4% 8.3% 41.6% 73.0% 4�1, 2, 3
1, 3�2
Empty 31.6% 22.2% 81.8% 78.4% 3, 4�1, 2
Temper 22.8% 15.3% 15.6% 59.5% 4�1, 2, 3
Paranoia/dissociation 21.1% 16.7% 32.5% 73.0% 4�1, 2, 3
Note. All tests were Chi-square tests with 3 degrees of freedom, and the significance of all tests was pB0.01; reported significant
pairwise post-hoc comparisons used an adjusted p-value using the Bonferroni method.
PTSD, Complex PTSD, and BPD
Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097 7 (page number not for citation purpose)
suicidal behaviors while this behavior was not endorsed
by anyone in the Low Symptoms class and by a relatively
low and equal proportion in the PTSD and CPTSD
classes (16.7 and 14.3%, respectively).
Functional impairment
Functional impairment was greatest in the BPD (M� 2.34, SD�0.43) and CPTSD class (M�2.31, SD�0.39)
relative to the PTSD (M�2.76, SD�0.48) and Low
Symptom (M�2.71, SD� 0.52) classes. The BPD and
CPTSD classes did not differ significantly from each other
in functional impairment (p�0.920). Similarly, the PTSD
and Low Symptom classes did not differ significantly
from each other in functional impairment (p�0.983).
BPD symptoms as indicators of risk for BPD versus
CPTSD diagnosis
The salience of each of the BPD symptoms as a ‘‘marker’’
of being in the BPD class compared to the CPTSD class
was evaluated. Relative risk (RR) was computed for each
symptom (see Table 5). RR provides the likelihood that a
person positive on a particular symptom will be in the
BPD class relative to the CPTSD class. Each of the BPD
symptoms was much more likely to be associated with the
BPD class versus the CPTSD class, except for emptiness.
The strongest symptom predictors of class were: frantic
about abandonment, unstable relationships, unstable sense
of self and impulsiveness.
Discussion Overall, the findings showed that the patterns of symp-
toms endorsed formed classes that are consistent with
diagnostic criteria for PTSD, Complex PTSD, and BPD.
The LCA identified four distinct classes of individuals
within a treatment-seeking sample: a Low Symptom class
that was relatively low in all measured symptoms; a
PTSD class that was high in symptoms of PTSD but
relatively low in self-organization symptoms and symp-
toms of BPD; a Complex PTSD class that was high in
symptoms of PTSD and self-organization symptoms but
relatively low in symptoms of BPD; and a BPD that was
high in symptoms of BPD with additional symptoms of
PTSD and CPTSD. These distinct classes demonstrated
acceptable discrimination. Additionally, these classes did
not differ in demographic variables (e.g., age, ethnicity,
employment status) or total number of traumas experi-
enced. These findings provide empirical support that the
symptom profiles endorsed by individuals with Complex
PTSD and BPD result in distinguishable subgroups of
trauma-exposed individuals.
While the individuals in the BPD reported many of
the symptoms of PTSD and CPTSD, the BPD class was
clearly distinct in its endorsement of symptoms unique
to BPD. The RR ratios presented in Table 5 revealed that
the following symptoms were highly indicative of place-
ment in the BPD rather than the CPTSD class: (1) frantic
efforts to avoid real or imagined abandonment, (2) un-
stable and intense interpersonal relationships characterized
by alternating between extremes of idealization and
devaluation, (3) markedly and persistently unstable self-
image or sense of self, and (4) impulsiveness. Given the
gravity of suicidal and self-injurious behaviors, it is
important to note that there were also marked differences
in the presence of suicidal and self-injurious behaviors
with approximately 50% of individuals in the BPD class
reporting this symptom but much fewer and an equivalent
number doing so in the CPSD and PTSD classes (14.3 and
16.7%, respectively). The only BPD symptom that in-
dividuals in the BPD class did not differ from the CPTSD
class was chronic feelings of emptiness, suggesting that
in this sample, this symptom is not specific to either BPD
or CPTSD and does not discriminate between them.
It should be noted that the endorsement of the CPTSD
symptoms related to self-organization disturbances was
high among members of the BPD class. It may be that the
presence emotion regulation problems does not distin-
guish CPTSD and BPD, although the severity and type
might, i.e., suicidality, self-injurious behavior are char-
acteristic of BPD not CPTSD. Alternatively, it may be that
the BSI is not optimal as a measure of self-organization
disturbances to provide differential diagnosis of CPTSD
versus BPD. The BSI tracks symptoms only for the past 2
weeks, and thus chronicity of symptoms was not assessed.
Members of the BPD class may have some but not all of
the CPTSD symptoms and may vary in their endorsement
of symptoms across time while the symptoms as endorsed
by the CPTSD class would be expected to be chronic and
stable. This interpretation is consistent with the data from
the SCID-II questions where items highlighting lack of
stability were strongly endorsed by the BPD but not the
CPTSD and PTSD class members.
Table 5. Relative risk of SCID-II BPD items*comparing
BPD versus CPTSD classes
BPD symptoms Relative risk 95% CI
Frantic 2.95* 2.10, 4.15
Unstable relationships 3.70* 2.18, 6.26
Unstable sense of self 3.07* 2.14, 4.42
Impulsiveness 3.04* 2.04, 4.55
Self-harm 2.10* 1.56, 2.83
Mood changes 2.04* 1.37, 3.04
Empty 0.90 0.61, 1.32
Temper outbursts 2.49* 1.80, 3.45
Dissociation 2.46* 1.65, 3.68
CI�Confidence Interval.
*pB0.01.
Interpretation example: Individuals positive on the Frantic symptom had a 2.95 times greater risk of being in the BPD
class than those without the Frantic symptom.
Marylène Cloitre et al.
8 (page number not for citation purpose)
Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097
Overall, the findings indicate that there are several
ways in which Complex PTSD and BPD differ, consistent
with the proposed diagnostic formulation of CPTSD.
BPD is characterized by fears of abandonment, unstable
sense of self, unstable relationships with others, and impul-
sive and self-harming behaviors. In contrast, in CPTSD
as in PTSD, there was little endorsement of items related
to instability in self-representation or relationships. Self-
concept is likely to be consistently negative and relational
difficulties concern mostly avoidance of relationships
and sense of alienation. Lastly, a comment on the Low
Symptom class is deserved. The class seems comprised
of individuals who have very low endorsement of PTSD
symptoms but somewhat higher endorsements on distur-
bances in self-organization. These symptoms may reflect
the presence of subsyndromal BPD or symptoms result-
ing from a mix other Axis I disorders (Bipolar Disorder,
Major Depression). Future studies, which evaluate Axis I
disorders and provide subsyndromal diagnoses, will help
decipher the nature of this class.
The distinct symptom profiles characterizing CPTSD
and BPD lead to different treatment considerations. The
focus of treatment for BPD concerns reduction of life-
interfering behaviors such as suicidality and self-injurious
behaviors, a reduction in dependency on others and an
increase in an internalized and stable sense of self
(e.g., Dialectical Behavior Therapy, Linehan, 1993). In
contrast, treatment programs for CPTSD focus on reduc-
tion of social and interpersonal avoidance, development of
a more positive self-concept and relatively rapid engage-
ment in the review and meaning of traumatic memories
(e.g., Cloitre et al., 2006). Duration of treatment for each
disorder and attention to the termination phase are
different as well. Experts in the treatment of BPD have
noted that the termination of treatment is a time of risk
for relapse and symptom exacerbation (see Harned &
Linehan, 2008). The end of therapy may provoke feelings
of abandonment, destabilize identity and lead to impul-
sive and self-injurious behaviors. The DSM guidelines
for BPD recommend treatment duration of at least 1 year
(American Psychiatric Association, 2013). A treatment
course of a year or more may allow for demonstrated
success in reduction of life-interfering behaviors, the rein-
forcement and routinization of effective emotion manage-
ment skills and a carefully planned end to treatment.
While the recommended duration of treatment for Com-
plex PTSD has not yet been established, it seems likely be
shorter than for BPD given the presence of a stable sense
of self and relative absence of substantial risk for self-
injurious behaviors and suicidality, but longer than that
for PTSD, given the greater number and diversity of
symptoms (see Cloitre et al., 2012).
Growing attention to patient-centered care, which em-
phasizes the patient’s specific symptoms, needs and
preferences will hopefully facilitate the development of
treatment programming that neither under-treats nor
over-treats the patient. The proposed spectrum of diag-
noses moving from PTSD to CPTSD and BPD may
provide a foundation for developing algorithms of type of
interventions and duration of care that meets the needs of
patients with symptom profiles that differ in clinically
significant ways.
A number of limitations of the current study are worth
noting. First, the sample consisted of a treatment-seeking
sample with a history of childhood interpersonal trauma.
Replication of results is necessary with samples that are
more representative of populations in clinical and com-
munity settings. Future studies should include samples
with greater diversity in types of trauma as well as
diversity in the exposure to traumatic stressors. Secondly,
the data used in the analyses are from a secondary source
and do not represent the ideal basis for evaluating ICD-11
PTSD and Complex PTSD symptoms. The Structured
Interview for Disorders of Extreme Stress (SIDES, Pelcovitz
et al., 1997), a structured clinician driven measure which
assesses many of the symptoms of Complex PTSD was
not available in this data set. Also, the time duration
for which the symptoms were assessed differed across
measures and thus did not allow consistency in the
assessment of the chronicity or variability of the symp-
toms endorsed. However, the study results, which provide
evidence of qualitative differences between the CPTSD
and BPD symptom profiles, suggest the importance of
developing empirically validated measures of ICD-11
PTSD and CPTSD and their comparison to BPD in a
variety of clinical and epidemiological samples.
Conclusion This study identified four distinct classes of individuals
who have experienced trauma, supporting the proposed
distinction between Complex PTSD and BPD. Key symp-
toms that differentiate BPD from Complex PTSD were
identified. These findings conform to ICD-11’s proposed
distinction between the diagnoses. They also point to the
merits of pursuing the construct of CPTSD as a separate
clinical entity from PTSD and BPD. However, to achieve
this agenda it is important that empirically validated
measures of CPTSD be developed for standardized assess-
ment of the construct in relation to PTSD and BPD.
Given that that there are efficacious treatments for
CPTSD (Cloitre et al., 2010) and BPD (e.g., Linehan,
1993), and these approaches vary in important ways, it is
useful for clinicians to be able to differentiate between
these presentations.
Disclaimer M Cloitre and R Bryant are members of the WHO of the
Working Group on the Classification of Stress-Related
Disorders. However, the views expressed reflect the opinions
PTSD, Complex PTSD, and BPD
Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097 9 (page number not for citation purpose)
of the authors and not necessarily the Working Group
and the content of this manuscript does not represent
WHO policy.
Conflict of interest and funding
There is no conflict of interest in the present study for
any of the authors. This manuscript was supported by
a National Institute of Mental Health grant, RO1 MH-
062347 to the first author (M. Cloitre).
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Citation: European Journal of Psychotraumatology 2014, 5: 25097 - http://dx.doi.org/10.3402/ejpt.v5.25097
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