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Table 3 Yusuf criteria on quality of subgroup analyses (for cluster randomized controlled trials (CRTs) and randomized controlled trials (RCTs) with subgroup analysis)

From: Reporting of health equity considerations in cluster and individually randomized trials

Yusuf criteriaCluster RCTs
N = 25
Individual RCTs
N = 49
N = 74
(%)(%)N (%)
Subgroup analysis pretested or planned a priori to the study commencement686750 (68)
Hypothesis or rationale for the analysis provided606145 (61)
Statistical test for interaction performed between the subgroups807054 (73)
Overall treatment results emphasized more than the findings of the subgroup analysis647352 (70)