Additional file 1: Table S1. of No improvement in the reporting of clinical trial subgroup effects in high-impact general medical journals

Variables examined for subgroup analysis. Table S2 Use of risk inex for subgroup exploration using appropriate methods. Table S3 RCTs that have a sample size greater than 250 and at least 100 per arm. Table S4 Bivariables associations of trial characteristics and reporting of any exploration of subgroup analysis and reporting of subgroup analysis using appropriate methods among RCTs that have a sample size greater than 250 and at least 100 per arm. (DOCX 26 kb)