Why are cause and effect research important to nursing practice?

Why are cause and effect research important to nursing practice? Choose a cohort research article. Summarize the research. Identify the strengths and weaknesses of the research article. How has this research article contributed to clinical nursing practice? 

Please always cite your resources.

This discussion must be a minimum of 200 words. You will be graded on grammar and writing style. You must use acceptable references (Wikipedia is not permitted).