Table 2 RR for asthma hospitalization in childhood according to birth weight, gestational age, and fetal growth
From: Birth weight, gestational age, fetal growth and childhood asthma hospitalization
Fetal development variables | Cases | Cumulative incidence (%) | Crude RR | Adjusted RR* (95% CI) |
|---|---|---|---|---|
Birth weight | ||||
<1000 g | 542 | 8.35 | 3.03 | 2.33 (2.14-2.53) |
1000-1499 g | 897 | 5.93 | 2.21 | 1.81 (1.68-1.95) |
1500-1999 g | 1,423 | 4.51 | 1.69 | 1.48 (1.40-1.57) |
2000-2499 g | 3,823 | 3.67 | 1.38 | 1.33 (1.28-1.38) |
2500-2999 g | 14,992 | 2.98 | 1.12 | 1.15 (1.12-1.17) |
3000-3499 g | 41,716 | 2.73 | 1.02 | 1.05 (1.04-1.07) |
3500-3999 g | 44,451 | 2.67 | 1 | 1 (ref) |
4000-4499 g | 19,371 | 2.73 | 1.02 | 0.99 (0.97-1.01) |
4500-4999 g | 4,037 | 2.89 | 1.08 | 1.03 (0.99-1.06) |
≥5000 g | 531 | 2.87 | 1.08 | 1.01 (0.92-1.11) |
Birth weight per 1000-g decrease | - | - | 1.18 | 1.17 (1.15-1.18) |
Gestational age | ||||
22-28 weeks | 737 | 8.07 | 2.89 | 2.26 (2.10-2.43) |
29-32 weeks | 1,416 | 5.16 | 1.88 | 1.63 (1.54-1.73) |
33-36 weeks | 6,471 | 3.50 | 1.28 | 1.26 (1.22-1.29) |
37-38 weeks | 23,062 | 2.98 | 1.09 | 1.10 (1.09-1.12) |
39-41 weeks | 91,055 | 2.73 | 1 | 1 (ref) |
42-45 weeks | 9,042 | 2.37 | 0.86 | 0.98 (0.95-1.00) |
GA per reduced week | - | - | 1.07 | 1.05 (1.04-1.06) |
Fetal growth | ||||
SGA | 4,878 | 3.38 | 1.23 | 1.20 (1.16-1.24) |
AGA | 121,741 | 2.76 | 1 | 1 (ref) |
LGA | 5,164 | 3.18 | 1.15 | 1.05 (1.02-1.09) |
Z-score per decreased of SD | - | - | 1.00 | 1.03 (1.02-1.04) |