Table 4

Adjusted ORs (95% CI) for respiratory symptoms in relation to secondhand smoke (SHS) exposure in 2006 and 2008*

Place of SHS exposureYearSHS exposure in the past 7 daysp Value§
None1–3 days4–7 daysPer day increase
At home200610.89 (0.61 to 1.29)1.09 (0.79 to 1.50)1.00 (0.89 to 1.19)0.88
200810.93 (0.67 to 1.50)1.19 (1.00 to 1.50)1.07 (0.95 to 1.20)
Outside home200611.20 (1.00 to 1.44)2.06 (1.34 to 3.18)1.35 (1.14 to 1.58)0.62
200811.08 (0.90 to 1.30)1.54 (1.20 to 1.98)1.20 (1.07 to 1.34)
Anywhere200611.15 (0.96 to 1.38)1.42 (1.11 to 1.80)1.18 (1.05 to 1.33)0.54
200811.05 (0.88 to 1.25)1.40 (1.14 to 1.70)1.14 (1.05 to 1.23)
  • * Adjusting for age, sex, grade, place of birth, parental smoking status and clustering effect of schools.

  • Additionally adjusted for SHS exposure outside home.

  • Additionally adjusted for SHS exposure at home.

  • § p For interaction term between year of survey and SHS exposure categories.