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Hamid Baradaran M.D. (Tehran) Ph.D., (Glasgow) Associate Professor of Clinical Epidemiology Iran University of Medical Sciences Post Code : 1449614535 , Tehran Iran Tel : 0098-21-86702216 Fax: 0098-21-86702237 E-mail: [log in to unmask] Web Page www.tums.ac.ir ----- Forwarded Message ----- From: Jalal Poorolajal <[log in to unmask]> To: Hamid R Baradaran <[log in to unmask]> Sent: Friday, July 19, 2013 9:38 AM Subject: Re: Fw: Meta-analysis of before/after studies Dear Colleagues, There is no difference between parallel design and before after design in meta-analysis. You can obtain a summary measure for the change or difference of the means using meta-analysis. Sincerely yours Jalal Poorolajal, MD, MPH, PhD Assistant Professor of Epidemiology, Department of Epidemiology & Biostatistics Managing Editor, Journal of Research in Health Sciences, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Islamic Republic of Iran Postal code: 65157838695 Tel: +98 811 8380090 [29] Fax: +98 811 8380509 E-mail 1: [log in to unmask] E-mail 2: [log in to unmask] URL: http://scholar.google.com/citations?hl=en&user=LDEnqk8AAAAJ&view_op=list_works -----Original Message----- >From: Hamid R Baradaran <[log in to unmask]> >To: Dr Ali Haghdoost <[log in to unmask]> >Cc: Dr Jalal Poorolajal <[log in to unmask]> >Date: Thu, 18 Jul 2013 12:52:13 -0700 (PDT) >Subject: Fw: Meta-analysis of before/after studies > > > > > > > > > > > > > > > > > > > > >----- Forwarded Message ----- >From: cesar yammine <[log in to unmask]> >To: >Sent: Thursday, July 18, 2013 9:00 PM >Subject: Meta-analysis of before/after studies > > > >Hello everybody, >I would like to know if anyone has experience with MA where the included studies have a before/after design. >Should I use the the same approach as with RCTs where I compute for example raw or standardized means and their SDs along with sample sizes or should I compute the change or difference of the means ( mean of intervention - mean of baseline). > >Regards > >Kaissar Yammine, MD, MPH, PhD >Head of the Foot and Hand Clinic >Director of the Center for Evidence-Based Sport and Orthopedic Research >Emirates Hospital >Dubai, UAE > >