Table 5– Effects of pre-term# and sex- and age-specified z-score of body mass index on respiratory outcomes
Written questionnaireVideo questionnaire
Ever wheeze
 Pre-term0.95 (0.80–1.12)0.95 (0.76–1.18)
 Not pre-term1.07** (1.04–1.10)1.10** (1.07–1.13)
Current wheeze
 Pre-term1.08 (0.76–1.54)0.89 (0.53–1.49)
 Not pre-term1.06* (1.01–1.11)1.07* (1.00–1.14)
Night wheeze
 Pre-term0.82 (0.52–1.30)0.94 (0.70–1.27)
 Not pre-term1.01 (0.95–1.08)1.05* (1.01–1.10)
Severe wheeze
 Pre-term0.96 (0.54–1.70)0.93 (0.74–1.15)
 Not pre-term1.03 (0.95–1.12)1.08** (1.05–1.11)
Wheeze with exercise
 Pre-term1.05 (0.87–1.25)1.12 (0.97–1.29)
 Not pre-term1.16** (1.13–1.19)1.17** (1.14–1.19)
Asthma
 Pre-term0.90 (0.72–1.14)
 Not pre-term1.02 (0.99–1.06)
Night cough
 Pre-term1.02 (0.89–1.17)1.26* (1.04–1.54)
 Not pre-term1.08** (1.05–1.10)1.13** (1.10–1.17)
  • Data are presented as OR (95% CI). All models were adjusted for parental education level, number of smokers at home, incense burning, active smoking, alcohol use and history of rhinitis and eczema. #: pre-term denotes gestational age <37 weeks. *: p<0.05; **: p<0.01.