| Non-referred |  | Referred |  |
---|---|---|---|---|
Unadjusted n ≤ 538* | Adjusted n ≤ 538* | Unadjusted n ≤ 477* | Adjusted n ≤ 477* | |
OR (95%CI) | OR (95%CI) | OR (95%CI) | OR (95%CI) | |
Mode of delivery* | ||||
 Spontaneous | ||||
 Assisted birth# | 1.25 (0.71–2.19) | 1.14 (0.63–2.07) | 0.97 (0.64–1.47) | 0.94 (0.60–1.47) |
Birthweight (in percentiles)* | ||||
 p ≥ 10 | ||||
 p > 10 | 0.51 (0.21–1.24) | 0.51 (0.21–1.24) | 0.90 (0.46–1.76) | 0.93 (0.47–1.84) |
Perineum* | ||||
 Not ruptured | ||||
 Ruptured | 0.97 (0.58–1.62) | 1.05 (0.61–1.80) | 0.53 (0.30–0.95) | 0.50 (0.27–0.95) |
 Episiotomy | 1.55 (0.89–2.71) | 1.53 (0.80–2.94) | 0.49 (0.27–0.89) | 0.48 (0.24–0.95) |
Haemorrhage* | ||||
 No | ||||
 Yes | 0.91 (0.34–2.47) | 0.97 (0.37–2.78) | 0.50 (0.21–1.15) | 0.52 (0.22–1.21) |
Place of birth  Home/birth centre |  |  |  |  |
 Hospital | 1.34 (0.87–2.05) | 1.36 (0.87–2.12) | NA | NA |
Transfer during labour* | ||||
 No | ||||
 Yes | 1.34 (0.87–2.06) | 1.31 (0.85–2.03) | NA | NA |
Induction of labour* | ||||
 No | ||||
 Yes | NA | NA | 1.87 (1.20–2.92) | 1.86 (1.17–2.95) |
Medical pain relief* | ||||
 No | ||||
 Yes | 2.06 (1.34–3.20) | 1.98 (1.24–3.17) | 1.40 (0.93–2.11) | 1.38 (0.88–2.15) |
Log duration of dilatations in hours | 1.20 (1.04–1.38) | 1.20 (1.04–1.38) | 1.03 (0.87–1.21) | 1.03 (0.87–1.21) |
Log duration of expulsion in minutes | 1.06 (0.83–1.36) | 1.06 (0.83–1.36) | 0.91 (0.70–1.20) | 0.91 (0.70–1.20) |