Table 1.
Demographic characteristics of study participants
| Term healthy (n = 86) | Preterm without BPD (n = 35) | Preterm with BPD (n = 22) | |
|---|---|---|---|
| Sex, male (% male) | 46 (53%) | 23 (66%) | 16 (73%) |
| Gestational age (w) | 39.4 (37.0, 41.9) | 30.6 (24.1, 35.6) | 27.4 (24.3, 31.6) |
| Birth weight (kg) | 3.3 (2.5, 4.9) | 1.5 (0.5, 3.0) | 1.0 (0.4, 2.6) |
| Birth weight z-score | −0.12 (−2.07, 2.75) | −0.60 (−3.58, 2.29) | −0.48 (−4.03, 3.46) |
| Study weight (kg) | 4.3 (3.2, 6.4) | 4.3 (2.7, 6.8) | 3.4 (2.6, 5.6) |
| Postconceptional age (w) | 44.3 (41.7, 48.0) | 44.9 (43.4, 47.0) | 44.7 (43.3, 51.9) |
| Infants with sighs/measured infants (%) | 86/223 (39) | 35/94 (37) | 22/82 (27) |
| Number of observed sighs | 136 | 52 | 45 |
Values are described as mean (range). BPD, bronchopulmonary dysplasia.