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Characteristics of the study population by sex
| Characteristic | Boys | Girls | p value for difference | Total | |||
|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | ||
| Total group (n = 220) | |||||||
| Gestational age (weeks) | 31.1 | 2.41 | 30.1 | 3.31 | 0.007 | 30.6 | 2.96 |
| Birth weight (g) | 1766.5 | 447.49 | 1599.9 | 560.13 | 0.016 | 1678.9 | 515.2 |
| Abdominal circumference (cm) | 24.1 | 2.66 | 23.5 | 3.36 | 0.101 | 23.8 | 3.05 |
