DELIVERY INTERVENTION/ CHARASTERISTICS | Unadjusted OR (95% CI) | Adjusted OR (95% CI) | Adjusted p-value |
---|---|---|---|
Mode of delivery | |||
Normal vaginal birth | 1 | ||
Forceps | 9.48 (6.18-14.55) | 22.55 (9.05-56.22) | ≤ 0.001 |
Vacuum assistance | 5.40 (4.98-5.86) | 7.37 (6.26-8.67) | ≤ 0.001 |
Episiotomy | 2.54 (2.35-2.73) | 1.95 (1.77-2.13) | ≤ 0.001 |
Episiotomy and vaginal delivery | 1 | ||
Episiotomy and forceps | 3.02 (2.41-3.80) | 0.21 (0.07-0.59) | 0.003 |
Episiotomy and vacuum assistance | 2.34 (2.24-2.44) | 0.40 (0.33-0.49) | ≤ 0.001 |
Maternal age (years) | |||
≤ 19 | 1 | ||
20-29 | 1.29 (1.02-1.64) | 1.39 (1.09-1.77) | 0.008 |
30-39 | 1.18 (0.92-1.30) | 1.37 (1.07-1.74) | 0.01 |
≥ 40 | 0.83 (0.59-1.17) | 1.01 (0.71-1.44) | 0.95 |
Birth weight (g) | |||
≤ 2999 | 1 | ||
3000-3499 | 1.69 (1.42-2.02) | 1.66 (1.40-1.98) | ≤ 0.001 |
3500-3999 | 2.40 (2.02-2.84) | 2.36 (2.00-2.80) | ≤ 0.001 |
≥ 4000 | 2.87 (2.72-3.86) | 3.22 (2.70-3.83) | ≤ 0.001 |
Amniotomy | 0.95 (0.89-1.03) | 0.91 (0.84-0.98) | 0.01 |
Augmentation with oxytocin | 1.89 (1.75-2.04) | 1.12 (1.07-1.27) | ≤ 0.001 |
Epidural analgesia | 1.96 (1.82-2.11) | 1.37 (1.26-1.49) | ≤ 0.001 |
*Spinal analgesia | 0.68 (0.54-0.85) | 0.77 (0.61-0.96) | 0.02 |
Nitrous oxide gas | 1.03 (0.96-1.11) | 0.87 (0.80-0.93) | ≤ 0.001 |
*Occiput posterior presentation | 7.95 (5.89-10.74) | 2.07 (1.52-2.81) | ≤ 0.001 |
Time of day | |||
8-23.59 | 1 | ||
00.00-7.59 | 0.85 (0.78-0.92) | 0.89 (0.82-0.97) | 0.01 |
Months | |||
All months excluding July | 1 | ||
July | 0.86 (0.75-0.98) | 0.85 (0.74-0.97) | 0.02 |