Table 2.
Differences in adverse neonatal outcomes among groups with different interpregnancy intervals
| Variables | Total | Interpregnancy interval (mon) | χ2 | P | |||
|---|---|---|---|---|---|---|---|
| < 12 | 12–23 | 24–59 | ≥ 60 | ||||
| Preterm birth | 1294 (16.9) | 82 (23.4) | 161 (17.0) | 371 (14.6) | 680 (17.8) | 22.3 | < 0.001 |
| Low birth weight | 930 (12.1) | 64 (18.3) | 114 (12.1) | 261 (10.3) | 491 (12.8) | 22.5 | < 0.001 |
| Macrosomia | 357 (4.7) | 13 (3.7) | 50 (5.3) | 118 (4.6) | 176 (4.6) | 1.5 | 0.661 |
| Small for gestational age | 419 (5.5) | 25 (7.1) | 44 (4.7) | 128 (5.0) | 222 (5.8) | 4.8 | 0.184 |
| Large for gestational age | 1373 (17.9) | 53 (15.1) | 156 (16.5) | 470 (18.5) | 694 (18.1) | 3.7 | 0.289 |
| 1-min Apgar score ≤ 7 | 342 (4.5) | 29 (8.3) | 41 (4.3) | 92 (3.6) | 180 (4.7) | 16.8 | 0.001 |