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Table 3 Sample Size and Power Considerations for Primary Analyses: SE and HRB Outcomes

From: Testing the effects of a prenatal depression preventive intervention on parenting and young children’s self-regulation and functioning (EPIC): protocol for a longitudinal observational study

Power N Intervention (Analysis) N Intervention (20% LTFU) N Control (Analysis) N Control (20% LTFU) Total N
0.90 256 320 256 320 640
0.85 219 274 219 274 548
0.80 192 240 192 240 480