Characteristics at birth for children with follow up data at 2 years obtained at 22–28 months corrected gestational age by mode of ventilation
| Variable | HFOV (N = 176) | CV (N = 197) | p Value |
|---|---|---|---|
| Values are mean (SD) or number/total (%). | |||
| *Denominator is the number of mothers/pregnancies. | |||
| †Postmenstrual age. | |||
| ‡Cranial ultrasound scans after day 14. | |||
| HFOV, High frequency oscillatory ventilation; CV, conventional ventilation. | |||
| Birth weight (g) | 882 (208) | 914 (210) | 0.14 |
| Gestational age (weeks) | 26.7 (1.4) | 26.8 (1.3) | 0.38 |
| Birthweight SDS | −0.58 (1.01) | −0.47 (1.03) | 0.30 |
| Male | 95/176 (54%) | 107/197 (54%) | 0.95 |
| Multiple birth | 36/176 20%) | 50/197 (25%) | 0.26 |
| Mother smoked in pregnancy* | 41/149 (28%) | 43/170 (25%) | 0.65 |
| Postnatal steroids | 54/174 (31%) | 52/195 (27%) | 0.36 |
| Chronic lung disease at 36 weeks† | 103/176 (59%) | 115/197 (58%) | 0.98 |
| Oxygen dependent at discharge | 39/176 (22%) | 44/195 (23%) | 0.93 |
| Major cranial abnormality‡ | 15/158 (9%) | 24/188 (13%) | 0.34 |