Table 1 Perinatal characteristics of babies eligible for the case–control study
Perinatal characteristics | ROP group (n = 33) | Control group (n = 33) | P-value |
|---|---|---|---|
Gestational age(weeks) (Mean ± SD) | 29.5 ± 2.0 | 29.4 ± 2.0 | 0.803 |
Boys | 16 (48.5) | 16(48.5) | 1.000 |
Birth weight (g) (Mean ± SD) | 1206.1 ± 279.8 | 1128.8 ± 255.6 | 0.246 |
Small for gestational age | 4 (12.1) | 4 (12.1) | 1.000 |
Multiple pregnancy | 8 (24.2) | 6 (18.2) | 0.547 |
Apgar score (Mean ± SD) | |||
1 min | 7.2 ± 1.3 | 7.2 ± 1.2 | 0.921 |
5 min | 8.8 ± 0.8 | 8.9 ± 0.7 | 0.507 |
Perinatal asphyxia | 13 (39.4) | 15 (45.5) | 0.686 |
oxygen supplementation | |||
< 7 days | 8 (24.2) | 12 (36.4) | 0.284 |
> 7 days | 22 (66.7) | 17 (51.5) | 0.211 |
Blood transfusion | 18 (54.5) | 17 (51.5) | 0.805 |