Skip to main content

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