Characteristics for the 57 infants with tidal flow–volume measures assessed by three independent raters
| Boys | 36 (63.2) |
| Gestational age at birth (weeks) | 39.8 (36.6–42.9) |
| Birthweight (kg) | 3.6 (2.8–4.9) |
| Birth length (cm) | 51 (48.0–56.0) |
| Weight at 3 months (kg) | 6.2 (4.57–8.18) |
| Length at 3 months (cm) | 62 (56.5–67.9) |
Data are presented as n (%) or mean (range).