Table 2 Antenatal and postnatal factors according to wheeze status at follow‐up.
| Wheeze | No wheeze | OR (95% CI) | p Value | |
|---|---|---|---|---|
| n | 60 | 51 | ||
| Birth weight (g) | 831 (198) | 910 (199) | 1.22 (1.00, 1.49) | 0.05 |
| Gestational age (weeks) | 26.0 (1.5) | 27.1 (1.2) | 1.76 (1.30, 2.36) | <0.001 |
| SGA | 15% (9/60) | 27% (14/51) | 0.45 (0.18, 1.16) | 0.10 |
| Antenatal smoking | 13% (8/60) | 8% (4/51) | 1.83 (0.51, 6.49) | 0.35 |
| Males | 62% (37/60) | 51% (26/51) | 1.62 (0.75, 3.50) | 0.22 |
| Duration of ventilation (days), median (IQ) | 17 (9, 35) | 12 (3, 20) | 1.43 (1.11, 1.84) | 0.006 |
| BPD | 75% (45/60) | 49% (25/51) | 3.46 (1.51, 7.93) | 0.003 |
| Family history of atopy | 55% (33/60) | 29% (15/51) | 3.35 (1.46, 7.64) | 0.004 |
| Parental smoking at home | 37% (22/60) | 25% (13/51) | 1.66 (0.73, 3.77) | 0.23 |
Odds ratio (OR) for birth weight is per 100 g decrease in birth weight. Odds ratio for gestational age is per week decrease in gestation. Odds ratio for duration of ventilation is per 10 days increase in duration. p Values are all adjusted for study to allow for differences in baseline factors between the two study groups. The data are presented as the mean (SD) or % (n) unless otherwise stated. BPD, bronchopulmonary dysplasia; IQ, interquartile range; SGA, small for gestational age (<9th centile).