PRISMA-Equity 2012 extension: reporting guidelines for systematic reviews with a focus on health equity

[...]they can assess effects of interventions aimed at reducing social gradients such as the review on interventions to reduce the social gradient in smoking [10],[13]. [...]they can assess effects of interventions not aimed at reducing inequity but where it is important to understand the effects of the intervention on equity, such as lay health workers [14] or obesity prevention in children [15].