Type of trial
1. Provides evidence of effects in a population considered to be disadvantaged
A study of a classroom drama intervention for mental health of immigrant and refugee youth in special classes .
A randomized controlled trial of community-led interventions to prevent domestic violence in Aboriginal communities .
2. Provides evidence of difference or equivalence in effects across socially stratifying factors
A study of sex differences in platelet reactivity and cardiovascular and psychological response to mental stress in patients with stable ischemic heart disease .
A study of the impact of an informed choice invitation on uptake of screening for diabetes in primary care assessed whether there were differences in effectiveness according to socioeconomic status .
3. Provides evidence of a gradient of effects across socially stratifying factors
A study of individual- and area-level unemployment influence smoking cessation among African Americans .
4. Provides no evidence about equity
Efficacy of the transillumination method for appropriate tracheal tube placement in small children: a randomized controlled trial .
A comparison of cast materials for the treatment of congenital idiopathic clubfoot using the Ponseti method .