- Characteristics of fetal outcomes.
| Variables | Total | Mother age <40 years | Mother age ≥40 years | Fisher’s exact test | OR (95% CI) |
|---|---|---|---|---|---|
| n (%) | |||||
| Birth weight | |||||
| <2500 g | 792 (18.3) | 308 (14.3) | 484 (22.4) | <0.0001 | 1.731 (1.479-2.026) |
| 2500-3599 g | 2271 (52.6) | 1314 (60.9) | 957 (44.3) | <0.0001 | 0.509 (0.451-0.574) |
| 3600-4500 g | 1202 (27.8) | 534 (24.8) | 668 (30.9) | <0.0001 | 1.358 (1.188-1.552) |
| >4500 g | 53 (1.2) | - | 53 (2.5) | - | - |
| NICU admission | |||||
| Yes | 256 (5.9) | 72 (3.3) | 184 (8.5) | <0.0001 | 2.693 (2.036-3.560) |
| No | 4062 (94.1) | 2084 (96.7) | 1978 (91.5) | 0.096 | 0.371 (0.281-0.491) |
| Apgar score | |||||
| Normal | 4161 96.4) | 2087 (96.8) | 2074 (95.9) | 0.840 | 0.779 (0.565-1.074) |
| Abnormal | 110 (2.5) | 25 (1.2) | 85 (3.9) | <0.0001 | 3.488 (2.224-5.471) |
| Abnormality | |||||
| None | 4004 (92.7) | 2015 (93.5) | 1989 (92.0) | 0.681 | 0.805 (0.639-1.013) |
| Down syndrome | 15 (0.3) | - | 15 (0.7) | - | - |
| Others | 299 (6.9) | 141 (6.5) | 158 (7.3) | 0.326 | 1.127 (0.890-1.426) |
| Viability | |||||
| Live birth | 4271 (98.9) | 2112 (98.0) | 2159 (99.9) | 0.472 | 14.993 (4.648-48.359) |
| Still birth | 47 (1.1) | 44 (2.0) | 3 (0.1) | <0.0001 | 0.067 (0.021-0.215) |
The values presented as number and percentages (%). Fisher’s extract test utilized to see whether there was a significant difference between groups. OR: odds ratio, CI: confidence interval, NICU: neonatal intensive care unit