Gestational age (GA) | Weight | Male:female ratio | |
Normal | 27.6 weeks ±2.04 | 1025 g ±311 | 15:12 |
Grade I | 27.4 weeks ±2.6 | 1030 g ±302 | 6:8 |
Grade II | 26.1 weeks ±1.6 | 906 g ±205 | 7:7 |
Grade III | 26.9 weeks ±2.1 | 964 g ±276 | 6:8 |
Grade IV | 25.6 weeks ±1.5 | 877 g ±253 | 10:4 |
When GA was recorded with both weeks and days in patient records, GA was rounded down at 3 days and rounded up at 4 days.