Table 2. Neonatal outcome in each group of maternal age.
| Outcomes | Maternal age (years) | Overall | P-value | P-value for Trend | ||
|---|---|---|---|---|---|---|
| 15–20 | 21–35 | 36–55 | ||||
| N | 117 | 6,199 | 1,382 | 7,698 | ||
| Composite outcomea, N (%) | 49/117 (41.9) | 2,507/6,199 (40.4) | 581/1,382 (42.0) | 3,137/7,698 (40.8) | 0.53 | 0.35 |
| Mortality | 7/117 (6.0) | 297/6,199 (4.8) | 67/1,382 (4.8) | 371/7,698 (4.8) | 0.84 | 0.90 |
| NEC ≥ stage II | 4/117 (3.4) | 282/6,199 (4.5) | 61/1,382 (4.4) | 347/7,698 (4.5) | 0.83 | 0.99 |
| Moderate & severe BPD | 39/117 (33.3) | 1,650/6,183 (26.7) | 393/1,378 (28.5) | 2,082/7,678 (27.1) | 0.12 | 0.45 |
| Brain damageb | 11/98 (11.2) | 561/5,459 (10.3) | 121/1,229 (9.8) | 693/6,786 (10.2) | 0.85 | 0.59 |
| Severe IVHb | 8/98 (8.2) | 350/5,428 (6.4) | 84/1,221 (6.9) | 442/6,747 (6.6) | 0.70 | 0.77 |
| cPVLb | 4/102 (3.9) | 305/5,681 (5.4) | 59/1,277 (4.6) | 368/7,060 (5.2) | 0.47 | 0.40 |
| Severe ROPb | 5/105 (4.8) | 362/5,845 (6.2) | 90/1,295 (6.9) | 457/7,245 (6.3) | 0.67 | 0.39 |
| Sepsis | 6/117 (5.1) | 572/6,199 (9.2) | 126/1,382 (9.1) | 704/7,698 (9.1) | 0.31 | 0.68 |
a, composite Outcome included death or at least one of any morbidity including NEC ≥ Stage II, Moderate & Severe BPD, Brain damage, Severe ROP, and sepsis. b, morbidity among newborns who have been screened. NEC, necrotizing enterocolitis; BPD, bronchopulmonary dysplasia; IVH, intraventricular hemorrhage; cPVL, cystic periventricular leukomalacia; ROP, retinopathy of prematurity.