Table 4.
Characteristics of participants and non-participants born very preterm or with extremely low birthweight.
| Participants (n = 50) | Non-participants (n = 98) | P-value | |
|---|---|---|---|
| Male/female, n | 24/26 | 50/48 | 0.08 |
| Cohort 1/2/3, n | 21/16/18 | 28/19/51 | |
| BW, g, mean (SD) | 961 (225) | 896 (178) | |
| GA, weeks, median (IQR) | 27 (2) | 27 (2) | 0.3 |
| Days on ventilator, mean (SD) | 8 (10) | 8 (9) | 0.9 |
| Days on CPAP, mean (SD) | 28 (14) | 31 (19) | 0.6 |
| Days on O2 supplement, mean (SD) | 51 (37) | 57 (42) | 0.4 |
| Moderate/severe BPD, n | 28% | 45% | 0.04 |
| Prenatal steroid treatment, n | 48% | 60% | 0.3 |
| Postnatal steroid treatment, n | 18% | 25% | 0.3 |
| Surfactant, n | 40% | 52% | 0.2 |
Cohort 1, born 1982–1985; cohort 2, born 1991–1992; cohort 3, born 1999–2020; BW, birthweight; GA, gestational age; IQR, interquartile range; CPAP, continuous positive airway pressure; O2, oxygen; BPD, bronchopulmonary dysplasia (classified as moderate/severe BPD if need for supplemental O2 or CPAP at 36 weeks of gestation).