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http://dx.doi.org/10.2147/IJGM.S50243

The effectiveness of massage therapy for the treatment of nonspecific low back pain: a systematic review of systematic reviews

Saravana Kumar1

Kate Beaton1

Tricia Hughes2

1International Centre for Allied Health evidence, School of Health Sciences, University of South Australia, Adelaide, South Australia, Australia; 2Australian Association of Massage Therapists, Adelaide, South Australia, Australia

Correspondence: Saravana Kumar International Centre for Allied Health evidence (iCAHe), C7-61 City east Campus University of South Australia, Adelaide, SA 5000, South Australia, Australia Tel +61 8 8302 2085 Fax +61 8 8302 2766 email [email protected]

Introduction: The last decade has seen a growth in the utilization of complementary and alternative medicine therapies, and one of the most popular and sought-after complementary and

alternative medicine therapies for nonspecific low back pain is massage. Massage may often be

perceived as a safe therapeutic modality without any significant risks or side effects. However,

despite its popularity, there continues to be ongoing debate on the effectiveness of massage in

treating nonspecific low back pain. With a rapidly evolving research evidence base and access

to innovative means of synthesizing evidence, it is time to reinvestigate this issue.

Methods: A systematic, step-by-step approach, underpinned by best practice in reviewing the literature, was utilized as part of the methodology of this umbrella review. A systematic search was

conducted in the following databases: Embase, MEDLINE, AMED, ICONDA, Academic Search

Premier, Australia/New Zealand Reference Centre, CINAHL, HealthSource, SPORTDiscus,

PubMed, The Cochrane Library, Scopus, Web of Knowledge/Web of Science, PsycINFO, and

ProQuest Nursing and Allied Health Source, investigating systematic reviews and meta-analyses

from January 2000 to December 2012, and restricted to English-language documents. Meth-

odological quality of included reviews was undertaken using the Centre for Evidence Based

Medicine critical appraisal tool.

Results: Nine systematic reviews were found. The methodological quality of the systematic reviews varied (from poor to excellent) although, overall, the primary research informing

these systematic reviews was generally considered to be weak quality. The findings indicate

that massage may be an effective treatment option when compared to placebo and some active

treatment options (such as relaxation), especially in the short term. There is conflicting and

contradictory findings for the effectiveness of massage therapy for the treatment of nonspecific

low back pain when compared against other manual therapies (such as mobilization), standard

medical care, and acupuncture.

Conclusion: There is an emerging body of evidence, albeit small, that supports the effectiveness of massage therapy for the treatment of non-specific low back pain in the short term. Due to

common methodological flaws in the primary research, which informed the systematic reviews,

recommendations arising from this evidence base should be interpreted with caution.

Keywords: massage therapy, systematic review, evidence-based practice, complementary and alternative medicine

Introduction Recent times have witnessed dramatic changes to health care. There is now an overt

recognition for quality to inform health care practices and this recognition for change

has been driven by an increasingly well-informed consumer of health service, the

patient, and other stakeholders who strive to underpin their service delivery within the

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Kumar et al

quality health care framework. The key components of this

framework include safety, effectiveness, patient centeredness,

timeliness, efficiency, and equity.1 Much of the drive towards

quality health care has been championed by evidence-based

practice, which recognizes the need for health care practices

to be underpinned by an integration of research evidence,

clinical expertise, and patient values.2

Low back pain is one of the most common musculoskeletal

disorders in modern society and is a major reason for health

care utilization.3,4 The impact of low back pain is widespread,

including physical, social, psychological, and economic

aspects of an individual’s life. Low back pain can include

discomfort in any area of the spine from the 12th rib to the

inferior gluteal fold, and is only considered to be specific if its

etiology is known (such as diagnoses of degenerative or other

disease, infection, fracture, etc).3–5 Low back pain is usually

reported as self-limiting (acute or subacute durations), but it

is estimated that approximately 10% of this population will

develop chronic pain.3,4,6 However, it has been suggested that

this may be an underestimation, with the true number of low

back pain sufferers who progress to chronic pain ranging

from 16-62% at 6–12 months post injury.7 This imposes a

large burden on the health care system.4–8 In spite of a large

body of research evidence and a plethora of interventions

being available in this area, how best to manage this condition

continues to pose a challenge.

The last decade has seen a growth in the utilization of

complementary and alternative medicine (CAM) for a variety

of health conditions, including musculoskeletal disorders such

as nonspecific low back pain.3–9 Awareness in the general public

about CAM therapies is growing and their use is becoming

increasingly widespread.3,4 The total extrapolated cost in

Australia of CAMs and CAM therapists in 2004 was AUD1.

8 billion.9 Common CAM therapies for nonspecific low back

pain include acupuncture, massage, and manipulation.4

One of the most popular and sought-after CAM interven-

tions for nonspecific low back pain is massage.4 There are

many types of massage, including but not limited to Swedish

massage; Thai massage (a form of body work involving

assisted stretching); Shiatsu (a Japanese form of massage

utilizing finger and palm pressure and stretching techniques);

reflexology (the application of pressure to the zones of the

feet, hands, or ears, which are thought to correspond to various

body parts); and myofascial release (a manual therapy involv-

ing deep tissue work). Massage may often be perceived as a

safe therapeutic modality without any significant risks or side

effects3 and has been recommended by the Chartered Society

of Physiotherapy for the management of various pain-related

conditions, especially those of musculoskeletal origin.10

Despite its popularity, there continues to be ongoing debate on

the effectiveness of massage in treating nonspecific low back

pain. While there is a large body of primary research evidence,

such as randomized controlled trials (RCTs), historically,

secondary research evidence such as systematic reviews often

fail to draw any clear conclusions with which to inform health

care practice and policies. With a rapidly evolving research

evidence base, and access to innovative means of synthesizing

evidence, it is time to reinvestigate this issue.

This systematic review of systematic reviews (umbrella

review) sets out to provide a synthesis of the best available

research evidence for the effectiveness of massage therapy for

adults suffering from nonspecific low back pain. Systematic

reviews are considered to be the highest level of evidence for

intervention questions.11

Methods Review question This review determined the effectiveness of various forms

of massage therapy on nonspecific low back pain in adults

by answering the question “What is the evidence for the

effectiveness of massage therapy in adults with nonspecific

low back pain?”

Types of participants Included participants were adults (≥18 years) suffering from non-specific acute, sub-acute or chronic low back pain (low

back pain is defined as pain that is localized from the 12th

rib to the inferior gluteal fold).3,4 “Non-specific” means that

there is no specific cause of the low back pain such as neo-

plasms, infection, osteoporosis, arthritic conditions, fracture,

radicular syndrome or inflammatory processes.3,12,16

Types of exposure The treatment of interest in this review was massage therapy.

For the purpose of this review, massage is defined as the

manual manipulation of the soft tissues of the body for

therapeutic purposes.3,5,12

Types of comparators Comparators included but were not limited to: sham or

placebo treatment, medical interventions, physical therapy,

electrical therapy (transcutaneous electrical nerve stimula-

tion, ultrasound, etc), pharmaceutical interventions, and other

forms of alternative therapy.

Types of outcomes Outcomes included but were not limited to: patient self-

report/subjective change of symptoms, assessment of

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Table 1 Concepts searched and the keywords related to these concepts

Concept Keywords

Massage therapy

Massage therapy, massage, remedial therapy, acupressure, trigger point therapy, deep tissue massage, sports massage, Swedish massage, therapeutic massage, relaxation massage, muscle manipulation, musculoskeletal manipulation, Rolfing, reflexology, shiatsu, Thai massage, myofascial release, Bowen therapy

Low back pain

Back pain, backache, lumbago, sciatic, sciatica, spine, spinal, vertebrae, vertebral, intervertebral, low back pain, low back disorder, lower back pain, lumbar, myofascial pain syndromes, scoliosis, kyphosis, lordosis, intervertebral disc degeneration, disc prolapse, back injury, back rehabilitation

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Effectiveness of massage therapy for nonspecific low back pain

pain, functional status as measured by validated tools, and

assessment of range of motion.

Search strategy Databases A systematic search was conducted in the following

databases: Embase, MEDLINE, AMED, ICONDA,

Academic Search Premier, Australia/New Zealand Reference

Centre, CINAHL, HealthSource, SPORTDiscus, PubMed,

The Cochrane Library, Scopus, Web of Knowledge/Web

of Science, PsycINFO, and ProQuest Nursing and Allied

Health Source, investigating systematic reviews and meta-

analyses from January 2000 to December 2012, and restricted

to English-language documents. The key words used to

develop the search terms used can be found in Table 1. The

appropriate truncation symbols and Boolean operators were

used for each database searched and MeSH terms were used

where applicable. Two researchers independently conducted

the search with cross-checking of random databases to ensure

consistency across the search.

Pearling Reference lists of any umbrella reviews returned in this

search were also pearled for additional systematic reviews or

meta-analyses that may not have been found in the original

search.

Selection process Articles were included if they were systematic reviews

or meta-analyses that addressed massage therapy for the

treatment of nonspecific low back pain, as defined in this

umbrella review. Massage could have been administered

in either the treatment or control group, but information

regarding massage groups had to be reported separately to

any other complementary medicines or placebo treatments

administered. Articles that did not meet the PRISMA13

definition of a systematic review or meta-analysis were

excluded, as were any previous versions of updated sys-

tematic reviews. Articles that investigated massage therapy

as applied by chiropractors or physiotherapists were also

excluded, as these practitioners are not classified as mas-

sage therapists and therefore do not fit the criteria for this

umbrella review.

Methodological quality assessment Once relevant publications were identified, two reviewers

independently evaluated the methodological quality using

the Centre for Evidence Based Medicine (CEBM) critical

appraisal tool.14

Data extraction The data were extracted into a custom-built table based on

the CEBM questions. At this point, further exclusions were

made based on the full text of the articles.

Results Search findings A total of 1,854 articles were returned in the initial search

of the abovementioned databases, and two new system-

atic reviews were found by pearling the reference lists

of other umbrella reviews. Of these 1,856 articles, 262

were duplicate articles and 1,393 were removed based on

title, abstract, and study descriptors. The full text of the

remaining 201 articles was assessed by two independent

researchers for relevance, resulting in the exclusion of

a further 192 articles that did not match the inclusion

criteria. Any disputes were sent to a third researcher for

arbitration. The remaining nine systematic reviews were

included in this umbrella review. Figure 1 provides an

overview of the selection process using the PRISMA

flowchart format.13

Methodological quality of included reviews The nine included systematic reviews were critically

appraised with the CEBM critical appraisal tool.14 The over-

all quality scoring of the nine included systematic reviews

ranged from poor to excellent. Table 2 provides an overview

of critical appraisal scores for individual reviews.

The identified systematic reviews classified their find-

ings into three categories of low back pain: acute, chronic,

or mixed (where acute and chronic were reported together).

In order to maintain standardization and keep true to the

International Journal of General Medicine 2013:6

Id e n

ti fi

c a ti

o n

S c re

e n

in g

E li g

ib il it

y In

c lu

d e d

1,854 articles found in database search

1,856 articles found in search

1,594 articles screened for title and abstract

201 full text articles assessed for eligibility

9 systematic reviews included

262 duplicate articles excluded

1,393 articles excluded

192 full text articles excluded

2 new articles found through other methods

Figure 1 Flowchart of study selection. Note: Flowchart is as per the PRISMA flowchart format.13

Table 2 Score of included articles as per the Centre for evidence Based Medicine review validity appraisal sheet14

Author Year Q1 Q2 Q3 Q4 Q5 Q6 Quality score

Bronfort et al16 2004 Y N Y N N Descriptively Poor Brosseau et al20 2012 Y U Y Y Y Descriptively Good ernst et al17 2011 Y Y Y Y Y Descriptively excellent Furlan et al4 2012 Y Y Y U N Descriptively Good Kim et al18 2012 Y U Y U Y Meta-analysis Moderate Lewis and Johnson10 2006 Y N N Y N Descriptively Poor Lin et al23 2011 Y Y Y Y NA Descriptively excellent Pengel et al15 2002 Y U Y Y Y Descriptively Good van Middelkoop et al19 2011 Y U Y N Y Descriptively Moderate

Abbreviations: N, does not fulfill criteria; NA, not applicable to the paper; Q, question; U, unclear if it fulfills criteria; Y, fulfills criteria.

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Kumar et al

research evidence, the following section summarizes the

findings based on these three categories.

Category one: the effectiveness of massage therapy for acute/subacute nonspecific low back pain in adults Furlan et al4 identified ten trials, comprising 1,424 participants,

that focused on the effectiveness of massage for low back

pain. Of these, two trials were on acute/subacute nonspecific

low back pain and included 158 participants. These trials

showed significant short-term posttreatment benefits on

pain and disability measures after massage when compared

to placebo or no treatment. The assessment of methodologi-

cal quality was only reported overall and the potential bias

in massage-specific studies cannot be reported. However,

it was reported that, overall (ie, in studies of acupuncture,

massage, mobilization, and spinal manipulation), the quality

of the studies was poor.

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Effectiveness of massage therapy for nonspecific low back pain

Pengel et al15 identified two high quality RCTs, compris-

ing 164 participants, which compared the use of massage to

spinal manipulative therapy and corsets to treat non-specific

low back pain. It was reported that spinal manipulative

therapy and corsets both improved disability scores in com-

parison with massage (effect size 1.5, confidence interval

[CI]: 0.8,2.2; effect size -0.9 CI -1.6, -0.1) when using the

Roland Morris Disability Questionnaire (RMDQ).

Therefore, to summarize this research evidence, it is

likely that massage therapy may offer some positive benefits

in terms of reduction in pain and disability in the short term,

when compared to placebo or no treatment. However, this

was not the case when massage therapy was compared with

spinal manipulative therapy and corsets.

Category two: the effectiveness of massage therapy for chronic nonspecific low back pain in adults Bronfort et al16 identified one RCT, comprising 164 par-

ticipants, which investigated spinal manipulation therapy

and various forms of massage therapy for the treatment

of chronic low back pain. The findings from this RCT, of

low methodological quality (38%), indicated that massage

therapy was less effective than spinal manipulative therapy

applied by a chiropractor for disability outcomes (statisti-

cally significant), but not for pain improvement (statistically

nonsignificant).

Ernst et al17 identified two trials, comprising 249 partici-

pants, investigating reflexology for chronic low back pain.

The authors assessed the methodological quality of the two

trials they found using the Jadad scale and found that one of

the RCTs was moderate (3/5) and the other was high quality

(5/5). Results from both included trials were similar with

no significant change found between groups in either trial.

While effects were found in one of the two included trials,

this was not significant for reflexology in the treatment of low

back pain. This systematic review failed to provide evidence

that reflexology has benefits beyond that of a placebo effect.

Ernst et al state: “In conclusion, the notion that reflexology

is an effective treatment option is currently not based on

the evidence from independently replicated, high-quality,

clinical trials.”17

Furlan et al4 identif ied ten trials, comprising 1,424

participants, which focused on the efficacy of massage

for low back pain. Of these ten trials, eight investigated

chronic nonspecific low back pain in 1,266 participants.

The evidence indicated that massage was either no different

or better than mobilization in terms of immediate and

intermediate pain intensity (Short Form-36 pain scale,

McGill Pain Questionnaire [two trials]) and disability (two

trials), determined using the Oswestry Disability Index

and RMDQ. According to two meta-analyses, massage was

significantly better in terms of pain reduction (using the

visual analog scale [VAS]) in comparison with relaxation

and physical therapy (defined by Furlan et al4 as exercise

and/or electrotherapy) immediately following treatment, for

those with chronic nonspecific low back pain. In terms of

the intermediate effect of massage for patients with chronic

nonspecific low back pain, there were no significant differ-

ences in disability (according to RMDQ) or pain (VAS) when

compared with usual care (exercise and advice). Furlan et al4

also found one trial indicating that massage significantly

reduced pain intensity and disability in both immediate and

long-term follow-ups compared to acupuncture. The assess-

ment of quality was only reported overall; the potential bias

in massage-specific studies cannot be reported. However,

it was reported that, overall (ie, in studies of acupuncture,

massage, mobilization, and spinal manipulation), the quality

of the studies was poor.

Kim et al18 identified two RCTs, comprising 275 par-

ticipants, which reported on the use of acupressure (press-

ing acupuncture points with a finger or device) for the

treatment of chronic low back pain compared to routine

physical therapy. Both trials showed significant effects on

pain reduction compared to the routine physical therapy.

A meta-analysis was conducted for the two RCTs report-

ing pain intensity posttreatment (4 weeks) and at 6-month

follow-up for acupressure versus routine physical therapy

for participants with chronic low back pain. This revealed

that acupressure was more effective than physical therapy at

4 weeks. The authors state:

… meta-analysis demonstrated acupressure to be superior

to physical therapy in terms of pain [N = 275; SMD −0.71; 95 per cent CI −0.96 to −0.47; P < 0.00001; heterogeneity:

χ2 = 0.15, P = 0.70, I 2 = 0 per cent] after four weeks post- treatment.18

At the 6-month follow-up, acupressure had a significant

effect on pain, but the authors report presence of heterogene-

ity in the data analysis.

van Middelkoop et al19 identified three low-quality RCTs,

comprising 163 participants, which indicated that there was

no statistically significant reduction in pain when the massage

groups were compared with the control groups (relaxation

therapy and acupuncture; pooled weighted mean difference

was −0.93 [95% CI −8.51] [sic]). They conclude there is insufficient good-quality data with which to come to a firm

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Kumar et al

decision on the efficacy of massage therapy in the treatment

of chronic low back pain.

Therefore, to summarize this research evidence, massage

therapy may offer some positive benefits in terms of reduction

in pain and disability in the short term, when compared to

relaxation. However, this was not the case when massage

therapy was compared with spinal manipulative therapy.

There is equivocal evidence of effectiveness of massage

therapy when compared to mobilization and usual care

(advice and exercise).

Category three: the effectiveness of massage therapy for mixed acute, subacute, and chronic nonspecific low back pain in adults Bronfor t et al 16 identif ied three RCTs, comprising

197 participants, which investigated spinal manipulation

therapy and various forms of massage therapy for the treat-

ment of both acute and chronic low back pain. They found

evidence to suggest that spinal manipulative therapy may be

more effective in reducing pain (nonsignificant findings) than

placebo massage, and a single session of spinal manipula-

tive therapy resulted in fewer sick-leave days than friction

massage. The final study found a nonsignificant advantage

of spinal manipulation therapy over myofascial therapy for

pain and disability reduction. All three studies had low- to

moderate-quality scores (13%, 25%, and 63%).

Brosseau et al20 identified eleven trials regarding mas-

sage for the treatment of acute, subacute, or chronic non-

specific low back pain. However, the authors reported on

only four trials, comprising 954 participants, which scored

3 or more on the Jadad scale21 (high methodological qual-

ity). They found statistically significant results in favour of

pain reduction in comparison to sham laser treatment but

only “clinically important”20 results in decreased disability

and symptoms for massage (structural, therapeutic, and

relaxation massage) in comparison to usual care and sham

laser treatment.

Lewis and Johnson10 identified seven relevant studies,

with a total of 787 participants. These studies were critically

appraised using the Centre for Reviews and Dissemination

methodological scale.22 The included studies scored between

3 and 7 out of a maximum score of 9. The Centre for Reviews

and Dissemination methodological scale was modified to a

maximum score of 9 (rather than the original maximum score

of 11) by Lewis and Johnson, as they recognized the inability

to blind practitioners and clients for this type of intervention

(loss of 2 points).10 There was considerable variation between

the studies, limiting the ability to compare the findings.

Therapeutic massage resulted in better pain and disability

scores by end of trial than sham laser, and was found to be

superior to self-care, acupuncture, exercise and education,

and muscle relaxation. Soft tissue manipulation (six sessions,

over a 1-month period) was more effective in terms of reduc-

ing disability and pain than exercise with posture education

or treatment with sham laser for people with subacute low

back pain. Massage (three 30-minute sessions per week for

3 weeks) was better than mental relaxation, while massage

(two 30-minute sessions per week for 5 weeks) reduced pain

in comparison with standard medical care (pharmacology

and chronic pain education). The authors concluded that, as

therapeutic massage was superior to comparison groups in

only three of seven studies, the effectiveness of massage to

relieve low back pain was inconclusive.

Lin et al23 identified one RCT with low risk of bias,

comprising 579 participants, which investigated the cost-

effectiveness of massage therapy as compared to general

practice (GP) health care. This study indicated that massage

alone was less effective and more expensive from the health

care sector’s perspective than GP care. However, when exer-

cise and behavioral counseling were added to massage, it was

more cost-effective than GP care.

Therefore, to summarize this research evidence, mas-

sage therapy may offer some positive benefits in terms of

reduction in pain and disability in the short term, when

compared to sham and placebo interventions. However, this

was not the case when massage therapy was compared with

spinal manipulative therapy. There is equivocal evidence

of effectiveness of massage therapy when compared to

acupuncture, exercise and education, and relaxation. There

is limited evidence on the cost-effectiveness of massage

therapy when compared to other standard interventions for

nonspecific low back pain.

Discussion The aim of this umbrella review was to provide a synthesis

and judgment of best available research evidence related to

the effectiveness of massage therapy for the treatment of

nonspecific low back pain. With increasing consumption of

CAM therapies, in an era of evidence-based practice, it is

only appropriate to investigate the evidence underpinning

the effectiveness of CAM therapies.

The systematic reviews included in this umbrella review

ranged from poor methodological quality10,16 to moderate,18,19

good,4,15,20 or excellent methodological quality.17,23 Therefore,

we recommend that caution be used when interpreting the

conclusions of these reviews, as the primary research relat-

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Effectiveness of massage therapy for nonspecific low back pain

ing to massage and non-specific low back pain, for the most

part, had a high risk of bias.

While there are a number of systematic reviews investi-

gating the effectiveness of massage therapy for nonspecific

low back pain, there is mixed and conflicting evidence on

outcomes from massage therapy. There is emerging evi-

dence that massage may be an effective treatment option

for treating low back pain when compared to placebo or

sham therapies and other interventions (such as relaxation

techniques) in improving short-term pain and disability. The

role of massage as a moderately effective nonpharmacologi-

cal treatment option has also been discussed by Chou et al24

and Imamura et al8 as a recommendation for chronic low

back pain therapy.

The evidence is contradictory for the effectiveness of

massage when compared to other popular treatment options,

such as standard medical care, mobilization, and acupuncture

in improving short-term pain and disability. Spinal manipula-

tive therapy seems consistently to provide better outcomes

when compared to massage therapy. There was no evidence

found for the long-term (beyond 6 months) effectiveness of

massage therapy.

The methodology underpinning the primary research,

which informed the systematic reviews, was, for the most

part, classified as weak. This is a significant issue that has

plagued the evidence base for massage therapy and has

also been acknowledged by other researchers (Airaksinen

et al25). The methodological issues reported by the system-

atic reviews include small sample size, lack of adequate

blinding of assessors, and varied intervention parameters

and outcome measures. This is demonstrated by the finding

that only one of the nine included systematic reviews was

able to undertake a meta-analysis of the included primary

literature.18 This was due to the variability in the description

of intervention parameters, operational definition of massage

therapy, comparators, and outcome measures utilized in the

remaining eight included systematic reviews.

The poor quality of the primary research evidence base

may be partly due to the conflict between what occurs in

clinical practice and rigorous standards required within

research settings. In a clinical practice context, massage

therapy may often be offered as a “package of care” in

addition to advice and education and using a combination

of modalities. However, in a research context, a package

of care is rarely offered in order to avoid cointervention

bias. Therefore, the primary research undertaken may

not truly capture and replicate what occurs in a clinical

practice context. This is a challenge and a limitation when

undertaking and interpreting findings of research evidence

for massage therapy.

Limitations of this review This umbrella review, like any other research, has its limita-

tions, and these need to be acknowledged in the context of the

findings. Firstly, while all attempts were made to interrogate

and access all relevant literature, it is possible some publica-

tions may have been missed in the search process. This is

especially relevant for CAM topics, as publications in other

languages, originating from countries where English may not

be a first language, such as the People’s Republic of China

and India, may not be captured in Western databases. Sec-

ondly, as there was a lack of clarity around the type, use, and

comparators of massage therapy in these systematic reviews,

the heterogeneity made it impossible to combine the findings

across all included systematic reviews and come to an absolute

conclusion. Thirdly, one of the recurrent issues when inter-

preting these systematic review findings was the imperfect

primary research designs included in these reviews. Several of

the primary research studies had poor evaluations with several

methodological issues (such as lack of adequate descriptions

of interventions and poor long-term follow-up).

Conclusion Implications for practice The findings of this umbrella review indicate that massage

may be an effective treatment option in the short term when

compared to placebo and some active treatment options

(such as relaxation). However, there are conflicting and

contradictory findings for the effectiveness of massage

therapy for the treatment of nonspecific low back pain

when compared against other manual therapies (such as

mobilization, standard medical care, and acupuncture).

Given that there were no reported side effects or adverse

events as a result of massage therapy, it may be considered

as a viable treatment option, provided that cost implications

are considered.

The diversity and complexity of the evidence base for

the effectiveness of massage therapy for the treatment of

nonspecific low back pain underscores the importance of

a collaborative, patient-centered decision making process

between the patient and the health professional, which is

informed by best available evidence. In addition to this,

sound clinical reasoning, expertise of individual health pro-

fessionals, and health outcome data, collected using rigorous

outcome measures, should underpin the integration of the

findings from this umbrella review into clinical practice.

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Kumar et al

These processes build on the philosophy of evidence-based

practice in health care.

Implications for research Massage therapy seems to be a well-researched field of

therapy within CAMs. However, there are key knowledge

gaps in the literature that need to be addressed. Further

research is required to unpack the “black box” of massage

therapy, as there is ambiguity on the operational definition

of massage therapy. Various systematic reviews defined

and searched for many different types and modalities of

massage, with some discussing massage techniques as a

separate modality and some considering massage therapy

as part of a suite of interventions. This variability extended

to massage therapy parameters such as dosage, duration,

and intervention protocols. There is a scarcity of data on

the cost-effectiveness of massage therapy for the treatment

of nonspecific low back pain. As there is currently a dearth

of high-quality/low risk of bias primary research on the

effectiveness of massage for the treatment of nonspecific

low back pain, further research, such as RCTs, with sound

methodological rigor, are required. While there are a number

of systematic reviews investigating the effectiveness of mas-

sage therapy for nonspecific low back pain, the mechanism

underlying its action remains elusive. While physiological

and psychotherapeutic models have been proposed, the pre-

cise mechanism of action continues to be debated, requiring

ongoing further research.

Acknowledgment The authors gratefully acknowledge Ms Khushnum Pastakia

for her assistance and feedback during the preparation of

this manuscript.

Disclosure The funding for the conduct of this umbrella review was pro-

vided by the Australian Association of Massage Therapists.

The authors report no other conflicts of interest in this

work.

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25. Airaksinen O, Brox JI, Cedraschi C, et al; COST B13 Working Group on Guidelines for Chronic Low Back Pain. Chapter 4. European guidelines for the management of chronic nonspecific low back pain. Eur Spine J. 2006;15 Suppl 2:S192–S300.

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