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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%