Table 2

Asthma outcomes by gestational age group at ages 7 and 11

Wheezing in the last 12 monthsGestational age groups
<32 weeks;
very preterm
32–33 weeks;
moderate preterm
34–36 weeks;
late preterm
37–38 weeks;
early term
39–41 weeks;
full term
At 7 yearsn=103n=110n=629n=2417n=8939
 n (%)25 (22.2)23 (20.6)79 (13.7)304 (12.3)1033 (11.4)
 OR unadjusted (95% CI)2.22 (1.26 to 3.90)2.01 (1.18 to 3.41)1.23 (0.90 to 1.67)1.09 (0.94 to 1.26)1
 Fully adjusted OR (95% CI)*2.04 (1.12 to 3.72)1.85 (1.11 to 3.10)1.19 (0.86 to 1.64)1.06 (0.92 to 1.23)1
At 11 yearsn=106n=106n=618n=2327n=8533
 n (%)22 (17.1)21 (20.5)78 (12.5)283 (11.5)976 (11.1)
 OR unadjusted (95% CI)1.65 (0.96 to 2.82)2.06 (1.13 to 3.76)1.14 (0.82 to 1.58)1.04 (0.87 to 1.23)1
 Fully adjusted OR (95% CI)*1.64 (0.93 to 2.91)1.84 (1.04 to 3.25)1.12 (0.81 to 1.54)1.03 (0.87 to 1.22)1
Currently on asthma medication
At 7 yearsn=103n=110n=629n=2417n=8939
 n (%)10 (12.8)8 (7.8)40 (5.8)127 (5.4)389 (4.3)
 OR unadjusted (95% CI)3.29 (1.45 to 7.44)1.90 (0.88 to 4.16)1.38 (0.95 to 2.00)1.27 (1.02 to 1.58)1
 Fully adjusted OR (95% CI)*3.01 (1.25 to 7.28)1.71 (0.82 to 3.55)1.35 (0.92 to 1.97)1.24 (0.99 to 1.56)1
At 11 yearsn=106n=106n=618n=2327n=8533
 n (%)11 (12.4)13 (14.5)39 (5.0)134 (5.5)425 (4.9)
 OR unadjusted (95% CI)2.75 (1.28 to 5.91)3.29 (1.60 to 6.80)1.03 (0.71 to 1.50)1.13 (0.90 to 1.41)1
 Fully adjusted OR (95% CI)*2.73 (1.24 to 6.02)2.96 (1.48 to 5.91)1.00 (0.69 to 1.47)1.12 (0.89 to 1.41)1
  • Unweighted counts and survey-weighted proportions reported.

  • *Adjusted for child’s sex, ethnicity and age at interview; household’s national statistics socioeconomic classification, maternal age at delivery, lone parent family and alcohol use during pregnancy.