I know of Cochrane risk of bias assessment for randomized and non-randomized studies, but pre-post study design with one time point is not under EPOC non randomized studies, so does anyone have a guideline or reference methodology?
If the study has a control group: http://epoc.cochrane.org/sites/epoc.cochrane.org/files/uploads/Suggested%20risk%20of%20bias%20criteria%20for%20EPOC%20reviews.pdf
If the study has no control group, it is biased enough but this is what is available at Cochrane: http://handbook.cochrane.org/chapter_21/21_4_assessment_of_study_quality_and_risk_of_bias.htm
Also, you may try searching for "before after" instead of "pre/post".
The best resource I know for reporting guidelines (not quite the same as quality guidelines) is the equator network, at
http://www.equator-network.org/reporting-guidelines/
They have many guidelines, but sadly not one that I can see purely for before/after studies. However there is this
Des Jarlais DC, Lyles C, Crepaz N, and the TREND Group. Improving the reporting quality of nonrandomized evaluations of behavioral and public health interventions: The TREND statement. Am J Public Health. 2004;94:361-366.
& it may be helpful.
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Further, if you are wanting more of a quality perspective, there is the SQUIRE Guideline for quality improvement in health care, also available fro the equator network - at
http://www.equator-network.org/reporting-guidelines/squire/
Maybe once you've done yours you can prepare a whole new guideline for before/after studies?
Thanks Joanna, i will have a look at the equator network but i also found the BAQA tool to access the pre-post comparison and it covers majority of the issues that can affect the risk of bias in these types of studies
The methodological quality assessment tools for preclinical and clinical studies, systematic review and meta-analysis, and clinical practice guideline: a systematic review. The study over-viewed all quality assessment methods currently available.
Good Luck ...
http://onlinelibrary.wiley.com/doi/10.1111/jebm.12141/full
I used the Quality Appraisal Tool developed by Moga and Colleagues for pre-post study designs.
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