Table 1

Power calculations for sample of 120

Difference between groups

Power


70% × 60%

21%

70% × 50%

61%

70% × 45%

80%

70% × 40%

92%

60% × 50%

20%

60% × 40%

59%

60% × 35%

79%

60% × 30%

92%

50% × 40%

20%

50% × 30%

61%

50% × 25%

82%

40% × 30%

21%

40% × 20%

67%

40% × 15%

88%

30% × 20%

24%

30% × 15%

50%

30% × 10%

79%

20% × 15%

11%

20% × 10%

33%

20% × 5%

70%


Oldham et al. BMC Family Practice 2004 5:9   doi:10.1186/1471-2296-5-9

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