bComparison of GA, BW and ROP between the 2 NICUs
| Variables | Menelik II (n=158) | TASH (n=44) | P value |
| Screened for ROP | |||
| Mean GA (weeks) | 32.41±1.77 | 32.13±2.1 | 0.631 |
| Mean BW (g) | 1671.83±424.64 | 1497.81±422.86 | 0.483 |
| Severe ROP, n (%) | 9 (5.7%) | 4 (9.1%) | 0.42 |
| Mean GA (weeks) | 30.7±1.7 | 28±0 | 0.681 |
| Mean BW (g) | 1255±280 | 1135±191 | 0.322 |
BW, birth weight; GA, gestational age; NICUs, neonatal intensive care units; ROP, retinopathy of prematurity; TASH, Tikur Anbessa Specialized Hospital.