Results from overall and stratified random effects meta-analyses for the associations between intervention and mammography uptake in low income women.

*33 comparisons from 21 studies. † Effect measure is the difference in proportions between intervention and control group. ‡ P-value is obtained from the heterogeneity χ2. a Simple interventions include letters, telephone calls, videos and computer programmes but these are not face to face interventions. Multiple interventions include more than one type of intervention.