Table 3.

OR for different wheezing trajectories (early-remittent wheeze, late wheeze and persistent/relapsing wheeze) by gestational age group

Asthma trajectories	Gestational 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
No wheeze (no wheezing at 3, 5, 7 and 11)	n=50 (41.3%)	n=58 (55.4%)	n=349 (61.0%)	n=1317 (66.1%)	n=4784 (67.4%)
Early-remittent wheeze (only wheeze at 3 and/or 5)	n=27 (25.2%)	n=24 (19.1%)	n=119 (19.4%)	n=324 (16.7 %)	n=1072 (15.5%)
Relative risk ratio (95% CI)*	2.72 (1.49 to 4.96)	1.52 (0.89 to 2.60)	1.38 (1.10 to 1.74)	1.11 (0.94 to 1.29)	1
Late wheeze (only wheeze at 7 and/or 11)	n=13 (8.7%)	n=11 (7.9%)	n=26 (5.7%)	n=135 (5.6%)	n=481 (6.8%)
Relative risk ratio (95% CI)*	2.19 (1.04 to 4.62)	1.42 (0.71 to 2.86)	0.91 (0.58 to 1.42)	0.85 (0.66 to 1.09)	1
Persistent/relapsing wheeze (wheeze in early life at ages 3 and/or 5, and later in life at ages 7 and/or 11)	n=29 (24.8%)	n=19 (17.6%)	n=80 (13.9%)	n=239 (11.6%)	n=761 (10.3%)
Relative risk ratio (95% CI)*	4.30 (2.33 to 7.91)	2.06 (1.16 to 2.69)	1.45 (1.09 to 1.94)	1.15 (0.97 to 1.38)	1

Unweighted counts and survey-weighted proportions reported.

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