Fig. 2.

Empirical demonstration of the moving constant technique: Sexual risk reduction following a behavioural intervention as a function of each sample’s baseline depression. Sexual risk behaviour declined following the intervention at the last available follow-up to the extent that samples had higher levels of baseline depression (treatment [control] group effects appear as darker [white] triangles and the size of each plotted value reflects its weight in the analysis). The solid regression line indicates trends across initial levels of depression; dashed lines provide 95% confidence bands for these trends. Reproduced from Lennon et al. (2012).