Unadjusted OR ( 95%CI) p-value Adjusteda OR ( 95%CI) p-value
Respiratory tract infections  in the last 12 months  
No SHS reference   reference  
SHS in utero 1.66 (0.94 - 2.93) p=0.08 1.46 (0.48 - 4.40) p=0.50
Current SHS 1.27 (0.98 - 1.63) p=0.07 1.17 (0.77 - 1.77) p=0.46
Both in utero and current SHS 1.07 (0.69 - 1.67) p=0.75 1.00 (0.50 - 1.98) p=0.99
Wheezing ever
No SHS reference   reference  
SHS in utero 1.36 (0.75 - 2.47) p=0.32 0.82 (0.25 - 2.73) p=0.75
Current SHS 1.14 (0.87 - 1.50) p=0.35 1.14 (0.73 - 1.77) p=0.57
Both in utero and current SHS 1.30 (0.82 - 2.04) p=0.26 1.17 (0.57 - 2.39) p=0.67
Recent wheeze
No SHS reference   reference  
SHS in utero 1.05 (0.47 - 2.37) p=0.90 0.86 (0.18 - 4.17) p=0.85
Current SHS 0.97 (0.67 - 1.41) p=0.89 0.93 (0.51 - 1.69) p=0.82
Both in utero and current SHS 0.71 (0.35 - 1.44) p=0.34 0.66 (0.21 - 2.02) p=0.46
Asthmab
No SHS reference   reference  
SHS in utero 0.99 (0.34 - 2.89) p=0.97 3.01 (0.25 - 35.75) p=0.38
Current SHS 1.50 (0.86 - 2.62) p=0.15 2.20 (0.86 - 11.84) p=0.08
Both in utero and current SHS 0.99 (0.46 - 2.15) p=0.98 2.28 (0.44 - 11.67) p=0.32
aAnalysis adjusted for: age, gender, birth weight, gestational age, complications during pregnancy or birth, breastfeeding, child vitamin D supplementation, presence of one/more sibling(s), day-care attendance, highest parental education, and atopy in the family
bN=1073 children ≥ 6 years of age included in the analysis. *p<0.05
Table 2: Associations between SHS exposure and, respiratory tract infections in the last 12 months, wheezing ever, recent wheeze, and asthma.
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