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Table 4 Traction forces by protocol comparing cases with primary outcome and those without primary outcome

From: Perinatal outcome after vacuum assisted delivery with digital feedback on traction force; a randomised controlled study

 

Primary outcome (n = 6)

Not primary outcome (n = 236)

p-value

Peak force (N)¹

220 ± 35

183 ± 56

0.11

Total force (N minutes)²

460 (255-833)

182 (14-1565)

<0.01

  1. ¹mean ±SD, ²median (min-max)