Table 1.
Obstetrical characteristics by maternal age groups and parity
| Characteristics | Primiparous | Multiparous | ||||||
|---|---|---|---|---|---|---|---|---|
| 20 – 29 y (n=643) | ≥40 y (n=39) | RR | p | 20 – 29 y (n=1173) | ≥40 y (n=546) | RR | P | |
| Maternal age | 24.76±2.65 | 41.28±1.50 | - | NS | 26.16±2.33 | 41.53±1.62 | - | NS |
| Mean birth weight (g) | 3107.79±53 | 3161.11±47 | - | NS | 3219.74±54 | 3223.81±64 | - | <0.05 |
| Mean gestational age at birth (weeks) | 38.72±2.26 | 38.08±3.45 | - | NS | 38.78±2.07 | 38.53±2.34 | - | <0.05 |
| Parity | ||||||||
| 0 | 1931 | 39 | - | - | ||||
| 1-2 | - | - | 1925 | 159 | ||||
| 3-5 | - | - | 413 | 299 | ||||
| >5 | - | - | 8 | 88 | ||||
| Mode of delivery | ||||||||
| Vaginal | 453 (70.5%) | 21 (53.8%) | - | NS | 899 (76.6%) | 359 (66.5%) | 0.86 | <0.05 |
| Instrumental | 104 16.1%) | 3 (7.7%) | - | NS | 170 (14.4%) | 94 (17.4%) | - | NS |
| Cesarean section | 87 (13.5%) | 15 38.5%) | 2.85 | <0.05 | 107 (9.1%) | 87 (16.1%) | 1.76 | <0.05 |
y= year; RR= relative risk; NS= non significant