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Table 1 Clinical characteristics

From: Effect of team training and monitoring on the rate of failed mid and low cavity vacuum extraction: a hospital based intervention study

  Period 0 (n = 328) Period 1 (n = 370) Period 2 (n = 376) All N = 1074  
Age, years§ 31 (5) 31 (5) 30 (5) 31 (5) pa NS
pb < 0.05
pc NS
BMI ≥ 30 24 (9) 42 (12) 37 (10) 103 (10) NS
Height cm ≤ 1,55 9 (3) 27 (7) 20 (5) 56 (6) pa < 0.05
pb NS
pc NS
Nulliparous 264 (80) 297 (80) 294 (78) 855 (80) NS
GL, days# 283 (276–289) 283 (276–288) 280 (273–287) 281 (275–287) pa NS
pb < 0.01
pc < 0.01
Duration 1st stage min
median#
480 (300–690) 540 (360–750) 480 (300–660) 510 (330–690) pa < 0.05
pb < 0.01
pc NS
Duration 2nd stage min
median#
120 (60–210) 150 (60–210) 165 (90–230) 150 (60–210) pa < 0.05
pb NS
pc < 0.01
Epidural 245 (75) 283 (77) 297 (79) 825 (77) NS
Oxytocin 304 (93) 348 (94) 354 (94) 1006 (94) NS
Indication dystocia 168 (51) 227 (62) 202 (54) 597 (56) pa < 0.01
pb < 0.05
pc NS
Fetal head station mid 190 (58) 248 (68) 231 (61) 678 (62) Pa < 0.01
pb NS
pc NS
Birthweight ≥ 4500 g 10 (3) 15 (4) 9 (2) 34 (3) NS
Position non-OAP 37 (11) 52 (14) 54 (15) 143 (13) NS
Duration > 15 min* 15 (5) 44 (12) 21 (6) 80 (7) pa < 0.01
pb < 0.01
pc NS
Nr pulls > 6* 34 (11) 43 (12) 23 (6) 100 (10) pa NS
pb < 0.01
pc < 0.05
Cup detachment > 1* 24 (7) 15 (4) 10 (3) 49 (5) pa NS
pb NS
pc < 0.01
  1. §t-test mean (sd) #Wilcoxon Rank sum and Kruskal-Wallis median (25–75). All others Chi2
  2. a = period 0 vs 1, b = period 1 vs 2, c = period 0 vs 2
  3. *Variables part of the composite secondary outcome variable complicated extraction