TY - T1 - Subgroup analyses in randomised controlled trials: cohort study on trial protocols and journal publications SN - / UR - http://hdl.handle.net/10138/304999 T3 - A1 - DISCO Study Grp; Kasenda, Benjamin; Schandelmaier, Stefan; Sun, Xin; Tikkinen, Kari; Briel, Matthias A2 - PB - Y1 - 2014 LA - eng AB - OBJECTIVE: To investigate the planning of subgroup analyses in protocols of randomised controlled trials and the agreement with corresponding full journal publications. DESIGN: Cohort of protocols of randomised controlled trial and subsequent full journal publications. SETTING: Six research ethics committees in Switzerland, Germany, and Canada. DATA SOURCES: 894 protocols of randomised controlled trial involving patients approved by participating research ethics committees between 2000 and 2003 ... VO - IS - SP - OP - KW - 3142 Public health care science, environmental and occupational health; trial protocols; Randomised controlled trials N1 - PP - ER -