Respiratory hospitalisation ≥3 years | Adjusted | ||
Yes | No | ||
Model 1: gestational age <32 weeks | |||
0 | 34 (4.3) | 749 (95.7) | Ref. |
1 | 14 (8.1) | 158 (91.9) | 1.74 (0.76–3.98) |
2 | 7 (12.5) | 49 (87.5) | 2.14 (0.58–7.91) |
≥3 | 14 (30.4) | 32 (69.6) | 6.89 (2.72–17.43) |
Model 2: gestational age 32–36 weeks | |||
0 | 153 (2.1) | 7277 (97.9) | Ref. |
1 | 31 (4.9) | 596 (95.1) | 2.11 (1.27–3.49) |
2 | 11 (7.7) | 132 (92.3) | 2.77 (1.17–6.52) |
≥3 | 13 (15.9) | 69 (84.2) | 7.34 (3.30–16.32) |
Model 3: gestational age >36 weeks | |||
0 | 2301 (1.8) | 126 291 (98.2) | Ref. |
1 | 249 (4.6) | 5176 (95.4) | 2.54 (2.17–2.98) |
2 | 77 (8.7) | 805 (91.3) | 3.97 (2.95–5.34) |
≥3 | 64 (16.9) | 315 (83.1) | 8.94 (6.50–12.29) |
Data are presented as n (%) or hazard ratio (95% CI), unless otherwise stated. Hazard ratios adjusted for sex, maternal asthma during pregnancy, maternal smoking during pregnancy, mode of delivery, maternal age, number of previous pregnancies, percentage of optimal birthweight, Socio-Economic Index for Area score, season of birth, Aboriginal status, presence of any birth defect and year of infant's birth. Ref.: reference.