Table 8 Labour and birth outcomes for the recruited women, by subgroups
Outcome | Subgroup (relevant births in intervention; control groups) | Intervention | Control | Risk ratio [95% CI] |
|---|---|---|---|---|
VBAC (% of all births with known mode of birth that were VBAC)a | Trial as a whole (1165; 775) | 385 (33.0) | 223 (28.8) | 1.16 [1.01, 1.33] |
Germany (458; 280) | 179 (39.1) | 113 (40.4) | 1.00 [0.84, 1.20] | |
Ireland (361; 241) | 125 (34.6) | 65 (26.1) | 1.34 [1.04, 1.74] | |
Italy (346; 246) | 81 (23.4) | 45 (18.3) | 1.31 [0.93, 1.84] | |
Vaginal birth before previous CS (104; 54) | 51 (49.0) | 26 (48.1) | 0.99 [0.70, 1.40] | |
No vaginal births before previous CS (1061; 721) | 334 (31.5) | 197 (27.3) | 1.17 [1.01, 1.36] | |
Prior VBAC (74; 32) | 54 (73.0) | 25 (78.1) | 0.98 [0.77, 1.25] | |
No prior VBAC (1091; 743) | 331 (30.3) | 198 (26.6) | 1.15 [0.99, 1.34] | |
Recruitment at < 30 weeks (621; 459) | 178 (28.7) | 123 (26.8) | 1.14 [0.92, 1.41] | |
Recruitment at 30–32 weeks (104; 44) | 28 (26.9) | 15 (34.1) | 0.65 [0.38, 1.11] | |
Recruitment at ≥33 weeks (438; 270) | 178 (40.6) | 85 (31.5) | 1.21 [0.99, 1.48] | |
BMI (< 25.00) (555; 307) | 208 (37.5) | 113 (36.8) | 1.06 [0.89, 1.26] | |
BMI (25–29.99) (347; 268) | 103 (29.7) | 72 (26.9) | 1.06 [0.81, 1.38] | |
BMI (> 29.99) (201; 175) | 52 (25.9) | 33 (18.9) | 1.34 [0.91, 1.96] | |
Age (< 40 years) (1074; 701) | 354 (33.0) | 210 (30.0) | 1.11 [0.97, 1.28] | |
Age (≥40 years) (91; 71) | 31 (34.1) | 13 (18.3) | 1.96 [1.10, 3.49] | |
Spontaneous onset of labour (% of all women who went into labour who had a spontaneous onset of labour)b | Trial as a whole (527; 330) | 445 (84.4) | 281 (85.2) | 0.99 [0.93, 1.05] |
Germany (240; 171) | 185 (77.1) | 136 (79.5) | 0.98 [0.88, 1.08] | |
Ireland (182; 103) | 157 (86.3) | 92 (89.3) | 0.96 [0.87, 1.06] | |
Italy (105; 56) | 103 (98.1) | 53 (94.6) | 1.04 [0.97, 1.11] | |
Vaginal birth before previous CS (57; 50) | 50 (87.7) | 24 (80.0) | 1.07 [0.83, 1.38] | |
No vaginal births before previous CS (470; 300) | 395 (84.0) | 257 (85.7) | 0.98 [0.92, 1.04] | |
Prior VBAC (56; 29) | 44 (78.6) | 21 (72.4) | 1.02 [0.78, 1.32] | |
No prior VBAC (471; 301) | 401 (85.1) | 260 (86.4) | 0.98 [0.92, 1.04] | |
Recruitment at < 30 weeks (255; 186) | 226 (88.6) | 161 (86.6) | 1.01 [0.92, 1.09] | |
Recruitment at 30–32 weeks (42; 22) | 33 (78.6) | 19 (86.4) | 0.97 [0.73, 1.30] | |
Recruitment at ≥33 weeks (229; 122) | 186 (81.2) | 101 (82.8) | 0.98 [0.88, 1.08] | |
BMI (< 25.00) (277; 158) | 237 (85.6) | 137 (86.7) | 0.99 [0.91, 1.08] | |
BMI (25–29.99) (151; 106) | 127 (84.1) | 90 (84.9) | 0.97 [0.86, 1.09] | |
BMI (> 29.99) (76; 57) | 60 (78.9) | 46 (80.7) | 0.95 [0.78, 1.14] | |
Age (< 40 years) (489; 311) | 414 (84.7) | 265 (85.2) | 0.99 [0.93, 1.05] | |
Age (≥40 years) (38; 19) | 31 (81.6) | 16 (84.2) | 1.04 [0.82, 1.31] |