Table 6.
The incidence of complications during hospitalization in ELBW infants.
| < 500 g (n = 22) | 500–599 g (n = 52) | 600–699 g (n = 150) | 700–799 g (n = 372) | 800–899 g (n = 685) | 900–999 g (n = 1294) | Total (n = 2575) | p-value* | |
|---|---|---|---|---|---|---|---|---|
| RDS | ||||||||
| Assessed, n | 22 | 52 | 150 | 372 | 685 | 1294 | 2575 | |
| Diagnosed, n (%) | 21 (95.5) | 46 (88.5) | 141 (94.0) | 331 (89.0) | 579 (84.5) | 1075 (83.1) | 2193 (85.2) | < 0.001 |
| Oxygen dependency at 28 days | ||||||||
| Assessed, n | 5 | 18 | 58 | 140 | 360 | 821 | 1402 | |
| Diagnosed, n (%) | 5 (100.0) | 16 (88.9) | 46 (79.3) | 111 (79.3) | 249 (69.2) | 466 (56.8) | 893 (63.7) | < 0.001 |
| ROP | ||||||||
| Assessed, n | 5 | 22 | 71 | 187 | 412 | 819 | 1516 | |
| Diagnosed (any grade), n (%) | 1 (20.0) | 10 (45.5) | 32 (45.1) | 77 (41.2) | 155 (37.6) | 321 (39.2) | 596 (39.3) | NS |
| Diagnosed (≥ grade 3), n (%) | 0 | 8 (36.4) | 10 (14.1) | 29 (15.5) | 44 (10.7) | 62 (7.6) | 153 (10.1) | < 0.001 |
| NEC | ||||||||
| Assessed, n | 12 | 38 | 102 | 242 | 508 | 1074 | 1976 | |
| Diagnosed (any stage), n (%) | 0 | 6 (15.8) | 19 (18.6) | 32 (13.2) | 52 (10.2) | 128 (11.9) | 237 (12.0) | NS |
| Diagnosed (≥ stage IIb), n (%) | 0 | 1 (2.6) | 5 (4.9) | 5 (2.1) | 15 (3.0) | 21 (2.0) | 47 (2.4) | NS |
| IVH | ||||||||
| Assessed, n | 12 | 38 | 92 | 252 | 493 | 958 | 1845 | |
| Diagnosed (any grade), n (%) | 8 (66.7) | 15 (39.5) | 38 (41.3) | 95 (37.7) | 140 (28.4) | 246 (25.7) | 542 (29.4) | < 0.001 |
| Diagnosed (≥ grade III), n (%) | 6 (50.0) | 6 (15.8) | 16 (17.4) | 32 (12.7) | 33 (6.7) | 51 (5.3) | 144 (7.8) | < 0.001 |
| PVL | ||||||||
| Assessed, n | 12 | 38 | 92 | 252 | 493 | 958 | 1845 | |
| Diagnosed, n (%) | 0 (0) | 1 (2.6) | 5 (5.4) | 20 (7.9) | 45 (9.1) | 77 (8.0) | 148 (8.0) | NS |
RDS, respiratory distress syndrome; ROP, retinopathy of prematurity; NEC, necrotizing enterocolitis; IVH, intraventricular hemorrhage; PVL, periventricular leukomalacia; NS, no significant difference.
*Chi-square test linear-by-linear association were used to compare the groups of 500–599 g, 600–699 g, 700–799 g, 800–899 g and 900–999 g.