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Table 1 Power scenarios for the neonatal outcome

From: Trial protocol OPPTIMUM– Does progesterone prophylaxis for the prevention of preterm labour improve outcome?

fFN+

fFN-

Subjects (fFN+/fFN-) [Total]

Power

40%

10%

375/750 (1125)

81%

  

400/800 (1200)

83%

  

425/850 (1275)

85%

45%

13%

375/750 (1125)

88%

  

400/800 (1200)

90%

  

425/850 (1275)

92%

50%

15%

375/750 (1125)

93%

  

400/800 (1200)

94%

  

425/850 (1275)

95%