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Table 3 Comparison of indicators related to exposure to environmental tobacco smoke in indoor places, before and after the "Tobacco control law" came into force, by tobacco consumption. Population aged 18 to 64 years. Madrid Region, Spain

From: Impact of the "Tobacco control law" on exposure to environmental tobacco smoke in Spain

  Period after the law versus period prior to the law in non-smokers Period after the law versus period prior to the law in current smokers
  Odds ratio 95% CI p-value Odds ratio 95% CI p-value
Exposure at home a       
Someone regularly smoking at home 0.86d 0.69 to 1.08 0.171 0.78d 0.60 to 1.03 0.080
Time of exposure (daily)       
   No or sporadic exposure 1e    1e   
   < 1–3 hours 1.14 0.84 to 1.54 0.403 0.87 0.63 to 1.22 0.427
   More than 3 hours 0.56 0.34 to 0.93 0.020 0.68 0.45 to 1.04 0.078
Exposure at indoor workplaces b       
Close exposure (tobacco smoke reaches their workplace) 0.13d 0.09 to 0.19 < 0.001 0.15d 0.10 to 0.25 < 0.001
Time of exposure (daily)       
   No or sporadic exposure 1e    1e   
   < 1–3 hours 0.10 0.06 to 0.17 < 0.001 0.11 0.05 to 0.24 < 0.001
   More than 3 hours 0.14 0.09 to 0.22 < 0.001 0.10 0.06 to 0.18 < 0.001
Exposure in bars and restaurants c       
Environmental tobacco smoke in bars       
   None 1e    1e   
   Low level 0.60 0.38 to 0.95 0.029 0.49 0.24 to 0.99 0.047
   Fairly high level 0.29 0.18 to 0.46 < 0.001 0.33 0.16 to 0.67 0.002
   Very high level 0.18 0.11 to 0.29 < 0.001 0.12 0.05 to 0.27 < 0.001
Environmental tobacco smoke in restaurants       
   None 1e    1e   
   Low level 0.30 0.22 to 0.39 < 0.001 0.33 0.22 to 0.49 < 0.001
   Fairly high level 0.21 0.15 to 0.30 < 0.001 0.30 0.17 to 0.51 < 0.001
   Very high level 0.11 0.06 to 0.20 < 0.001 0.11 0.03 to 0.35 < 0.001
  1. a Households with more than one person
  2. b People who work in indoor places away from home
  3. c People who have visited such premises in the last month
  4. d Binary logistic regression. Odds ratios adjusted by sex, age, number of people in the household (only for exposure at home) and educational level. Reference categories: Nobody regularly smokes at home; No close exposure at workplace
  5. e Multinomial logistic regression. Odds ratios adjusted by the same variables as in the binary logistic regression models. First category = 1 is the reference category
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