Table 2.
Neonatal characteristics of infants and their relation with ROP development
| Variable | Category | No ROP % (n = 88) | ROP % (n = 27) | P value |
|---|---|---|---|---|
| Gestational age (weeks) | Mean ± SD | 30.7 ± 1.4 | 29.4 ± 1.3 | < 0.0010* |
| Gestational age group | ≤ 30 weeks | 29 (55.8%) | 23 (44.2%) | < 0.0010* |
| > 30 | 59 (93.7%) | 4 (6.3%) | ||
| Birth weight (grams) | Mean ± SD | 1382.5 ± 253.3 | 1185.0 ± 308.3 | 0.0012* |
| Birth weight group | < 1000 g | 4 (44.5%) | 5 (55.5%) | 0.0085* |
| 1000–1500 g | 53 (74.6%) | 18 (25.4%) | ||
| > 1500 g | 31 (91.2%) | 3 (8.8%) | ||
| Type of pregnancy | Singleton | 14 (73.7%) | 5 (26.3%) | 0.75 |
| Multiple gestation | 74 (77.1%) | 22 (22.9%) | ||
| Multiple gestation | Twin | 23 (82.1%) | 5 (17.9%) | < 0.0010* |
| Triplet | 30 (85.7%) | 5 (14.3%) | ||
| Quadruplet | 21 (75%) | 7 (25%) | ||
| Quintuplet | 0 | 5 (100%) | ||
| Sibling | Sibling affected by ROP | 10 (37%) | 17 (63%) | < 0.0010* |
| Sibling not affected by ROP | 61 (97%) | 2 (3%) | ||
| Level of HB at birth (g/dl) | Mean ± SD | 15.7 ± 1.8 | 14.9 ± 2.6 | 0.043* |
% within the same variable group
*significant at p value less than 0.05
ROP Retinopathy of Prematurity
SD Standard Deviation
HB hemoglobin