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Table 4 Sample Size and Power Considerations for Observational Assessments: BERA

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 Mean
Difference
Standard
Deviation
N per
Group (Analysis)
Total N
(Analysis)
Inflate
Total for 10% LTFU
Inflate
Total for 20% LTFU
0.91 0.5 points 0.7 46 92 102 115
0.86 0.5 points 0.7 39 78 87 98
0.80 0.5 points 0.7 34 68 76 85
0.92 1 point 0.7 13 26 29 33
0.86 1 point 0.7 11 22 24 28
0.81 1 point 0.7 10 20 22 25