Table 1

Association between tobacco smoking by the parents and symptoms of asthma, eczema and rhinoconjunctivitis at 6–7 and 13–14 years of age

SymptomTobacco questionAge group
6–7 years13–14 years
Current wheezeCurrent paternal smoking1.17 (1.12 to 1.21)1.20 (1.15 to 1.24)
Current maternal smoking1.28 (1.22 to 1.34)1.32 (1.26 to 1.37)
Mother smoked first year of life1.36 (1.29 to 1.43) *
Current wheeze (video)Current paternal smoking * 1.22 (1.15 to 1.29)
Current maternal smoking * 1.41 (1.32 to 1.49)
Severe asthma symptomsCurrent paternal smoking1.23 (1.16 to 1.30)1.26 (1.20 to 1.32)
Current maternal smoking1.32 (1.24 to 1.41)1.38 (1.31 to 1.45)
Mother smoked first year of life1.44 (1.33 to 1.55) *
Asthma everCurrent paternal smoking1.11 (1.06 to 1.15)1.08 (1.04 to 1.12)
Current maternal smoking1.26 (1.20 to 1.32)1.20 (1.16 to 1.25)
Mother smoked first year of life1.34 (1.27 to 1.42) *
Current eczema symptomsCurrent paternal smoking1.09 (1.04 to 1.13)1.19 (1.14 to 1.25)
Current maternal smoking1.15 (1.09 to 1.21)1.22 (1.16 to 1.28)
Mother smoked first year of life1.20 (1.13 to 1.27) *
Current rhinoconjunctivitisCurrent paternal smoking1.08 (1.04 to 1.13)1.15 (1.11 to 1.19)
Current maternal smoking1.12 (1.06 to 1.18)1.20 (1.15 to 1.25)
Mother smoked first year of life1.17 (1.10 to 1.24) *
Eczema without wheezeCurrent paternal smoking1.06 (1.01 to 1.11)1.15 (1.09 to 1.20)
Current maternal smoking1.10 (1.03 to 1.17)1.12 (1.05 to 1.18)
Mother smoked first year of life1.11 (1.04 to 1.19) *
Rhinoconjunctivitis without wheezeCurrent paternal smoking1.04 (0.99 to 1.09)1.11 (1.07 to 1.16)
Current maternal smoking1.05 (0.98 to 1.12)1.11 (1.06 to 1.16)
Mother smoked first year of life1.05 (0.98 to 1.13) *
  • Data are OR (95% CI) and are adjusted for gender, language, region and Gross National Income (GNI) category.

  • * Data not collected.