Age groups | ||||||||
---|---|---|---|---|---|---|---|---|
All teenagers | < 16 years | 16-17 years | 18-19 years | |||||
Characteristics | Crude | Adjusted† | Crude | Adjusted† | Crude | Adjusted† | Crude | Adjusted† |
Spontaneous onset delivery | 1.23 (1.19-1.27) | 1.17 (1.13-1.21) | 1.00 (0.78-1.28) | 0.92 (0.72-1.18) | 1.27 (1.17-1.38) | 1.18 (1.09-1.28) | 1.22 (1.17-1.27) | 1.17 (1.13-1.22) |
Induced delivery | 0.90 (0.86-0.93) | 0.92 (0.88-0.96) | 0.93 (0.68-1.29) | 0.95 (0.69-1.32) | 0.86 (0.78-0.95) | 0.91 (0.82-1.00) | 0.90 (0.86-0.95) | 0.92 (0.88-0.97) |
Normal vaginal delivery | 1.29 (1.25-1.33) | 1.70 (1.64-1.75) | 1.18 (0.92-1.51) | 1.61 (1.26-2.06) | 1.34 (1.25-1.45) | 1.80 (1.66-1.94) | 1.28 (1.23-1.33) | 1.67 (1.61-1.74) |
Forceps | 0.88 (0.73-1.06) | 0.56 (0.46-0.68) | 0.99 (0.25-3.98) | 0.67 (0.17-2.68) | 0.57 (0.33-0.98) | 0.34 (0.19-0.60) | 0.95 (0.78-1.17) | 0.61 (0.50-0.76) |
Vacuum extraction | 0.91 (0.87-0.95) | 0.59 (0.56-0.62) | 0.86 (0.59-1.25) | 0.50 (0.34-0.74) | 0.88 (0.78-0.98) | 0.54 (0.49-0.61) | 0.92 (0.87-0.97) | 0.60 (0.57-0.63) |
CS, all | 0.71 (0.69-0.75) | 0.61 (0.58-0.64) | 0.85 (0.63-1.16) | 0.65 (0.47-0.88) | 0.70 (0.63-0.77) | 0.58 (0.52-0.64) | 0.72 (0.68-0.75) | 0.61 (0.58-0.64) |
CS elective 1999-2010‡ | 0.55 (0.50-0.61) | 0.57 (0.51-0.63) | 1.74 (1.11-2.73) | 1.54 (0.96-2.48) | 0.52 (0.41-0.66) | 0.52 (0.41-0.67) | 0.54 (0.48-0.60) | 0.56 (0.50-0.63) |
CS acute 1999-2010‡ | 0.79 (0.73-0.84) | 0.62 (0.58-0.67) | 0.73 (0.42-1.27) | 0.47 (0.27-0.83) | 0.83 (0.72-1.07) | 0.64 (0.55-0.75) | 0.78 (0.72-0.84) | 0.62 (0.57-0.67) |
GA < 28 weeks | 1.93 (1.57-2.37) | 1.61 (1.31-2.00) | 4.86 (1.81-13.01) | 4.44 (1.66-11.92) | 2.65 (1.78-3.93) | 2.23 (1.48-3.35) | 1.71 (1.35-2.17) | 1.42 (1.11-1.83) |
GA < 32 weeks | 1.61 (1.43-1.81) | 1.37 (1.21-1.55) | 2.46 (1.17-5.20) | 2.25 (1.06-4.74) | 2.25 (1.78-2.84) | 1.90 (1.50-2.41) | 1.46 (1.26-1.66) | 1.24 (1.07-1.43) |
GA < 37 weeks | 1.33 (1.27-1.40) | 1.14 (1.08-1.20) | 2.57 (1.94-3.42) | 2.15 (1.60-2.87) | 1.53 (1.38-1.70) | 1.28 (1.15-1.42) | 1.26 (1.20-1.33) | 1.09 (1.03-1.15) |
GA 37 – 41 weeks | 0.91 (0.88-0.95) | 1.03 (0.99 -1.06) | 0.62 (0.49-0.79) | 0.71 (0.55-0.90) | 0.83 (0.77-0.89) | 0.93 (0.86-1.01) | 0.94 (0.91-0.98) | 1.06 (1.02-1.10) |
GA ≥42 weeks | 0.92 (0.88-0.97) | 0.85 (0.81-0.89) | 0.87 (0.60-1.27) | 0.84 (0.57-1.22) | 0.96 (0.87-1.07) | 0.91 (0.81-1.01) | 0.91 (0.87-0.96) | 0.84 (0.80-0.89) |
Epidural analgesia¥ | 1.76 (1.72-1.81) | 1.08 (1.05-1.11) | 1.80 (1.49-2.18) | 1.00 (0.82-1.22) | 1.91 (1.81-2.02) | 1.10 (1.03-1.16) | 1.73 (1.68-1.78) | 1.08 (1.05-1.11) |
Perineal rupture grade 1-2¥ | 0.60 (0.58-0.62) | 0.52 (0.50-0.54) | 0.66 (0.51-0.86) | 0.48 (0.37-0.64) | 0.56 (0.52-0.61) | 0.47 (0.43-0.52) | 0.61 (0.58-0.63) | 0.53 (0.51-0.55) |
Perineal rupture grade 3-4¥ | 0.57 (0.51-0.64) | 0.43 (0.38-0.49) | 0.52 (0.19-1.39) | 0.34 (0.13-0.91) | 0.62 (0.47-0.81) | 0.45 (0.34-0.59) | 0.56 (0.49-0.64) | 0.43 (0.37-0.49) |
Preeclampsia | 1.12 (1.03-1,23) | 0.94 (0.86-1.03) | 1.64 (0.93-2.91) | 1.23 (0.67-2.25) | 1.06 (0.86-1.31) | 0.92 (0.74-1.14) | 1.13 (1.02-1.24) | 0.94 (0.85-1.04) |
Abruptio placentae | 1.31 (1.11-1.55) | 1.19 (0.99-1.41) | 0.57 (0.08-4.05) | 0.59 (0.08-4.17) | 1.46 (1.01-2.10) | 1.34 (0.93-1.94) | 1.29 (1.07-1.56) | 1.17 (0.96-1.41) |
Placenta praevia | 0.34 (0.21-0.55) | 0.37 (0.23-0.59) | 2.53 (0.63-10.15) | 2.72 (0.68-10.93) | 0.11 (0.02-0.79) | 0.12 (0.02-0.83) | 0.35 (0.21-0.60) | 0.38 (0.22-0.64) |
PPH > 1000 ml (VD) | 0.73 (0.67-0.79) | 0.70 (0.64-0.76) | 0.70 (0.37-1.31) | 0.61 (0.33-1.15) | 0.76 (0.63-0.91) | 0.71 (0.60-0.85) | 0.72 (0.66-0.79) | 0.70 (0.64-0.76) |
PPH > 1000 ml (CS) | 0.93 (0.63-1.36) | 0.98 (0.66-1.44) | N/A | N/A | 1.74 (0.90-3.38) | 1.71 (0.88-3.33) | 0.77 (0.48-1.23) | 0.75 (0.47-1.20) |