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Table 2 Comparison of indicators related to exposure to environmental tobacco smoke in indoor places, before and after the "Tobacco control law" came into force. 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 prior to the law October-November 2005 n = 1750a Period after the law January-July 2006 n = 1252a Period after the law versus period prior to the law
  n % 95% CI n % 95% CI Odds ratio 95% CI p-value
Exposure at home b          
Someone regularly smoking at home 579 34.3 32.1 to 36.6 354 30.5 27.9 to 33.2 0.84e 0.71 to 1.00 0.044
Time of exposure (daily)          
   No or sporadic exposure 1310 77.7 75.7 to 79.7 922 79.8 77.4 to 82.1 1f   
   > 0–3 hours 235 13.9 12.3 to 15.7 171 14.8 12.8 to 17.0 1,00 0.80 to 1.25 0.998
   More than 3 hours 140 8.3 7.0 to 9.7 62 5.4 4.1 to 6.8 0.65 0.47 to 0.90 0.009
Regular smokers who smoke at home 330 61.3 57.1 to 65.5 237 61.6 56.5 to 66.4 1.07e 0.81 to 1.42 0.641
Exposure at indoor workplaces c          
Close exposure (tobacco smoke reaches their workplace) 412 40.5 37.5 to 43.6 66 9.0 7.0 to 11.3 0.14e 0.11 to 0.19 < 0.001
Time of exposure (daily)          
   No or sporadic exposure 553 54.5 51.4 to 57.6 669 91.1 88.9 to 93.1 1f   
   > 0–3 hours 193 19.0 16.6 to 21.6 24 3.3 2.1 to 4.8 0.11 0.07 to 0.17 < 0.001
   More than 3 hours 269 26.5 23.8 to 29.3 41 5.6 4.0 to 7.5 0.12 0.09 to 0.18 < 0.001
Regular smokers who smoke at work 197 57.9 52.5 to 63.2 27 10.6 7.1 to 15.1 0.08e 0.05 to 0.13 < 0.001
Exposure in bars and restaurants d          
Environmental tobacco smoke in bars          
   None 46 3.0 2.2 to 3.9 86 8.1 6.6 to 10.0 1f   
   Low level 484 31.2 28.9 to 33.6 495 46.9 43.9 to 50.0 0.54 0.37 to 0.80 < 0.001
   Fairly high level 640 41.3 38.8 to 43.8 359 34.0 31.2 to 37.0 0.30 0.20 to 0.44 < 0.001
   Very high level 381 24.6 22.4 to 26.8 115 10.9 9.1 to 12.9 0.16 0.10 to 0.24 < 0.001
Environmental tobacco smoke in restaurants          
   None 157 11.9 10.2 to 13.8 294 32.4 29.4 to 35.6 1f   
   Low level 798 60.4 57.7 to 63.1 476 52.5 49.2 to 55.8 0.31 0.25 to 0.39 < 0.001
   Fairly high level 261 19.8 17.6 to 22.0 114 12.6 10.5 to 14.9 0.24 0.18 to 0.32 < 0.001
   Very high level 105 7.9 6.5 to 9.5 22 2.4 1.5 to 3.7 0.11 0.07 to 0.19 < 0.001
  1. a Total sample size. Differs according to variables used
  2. b Households with more than one person
  3. c People who work in indoor places away from home
  4. d People who have visited such premises in the last month
  5. e Binary logistic regression. Odds ratios adjusted by sex, age, number of people in the household (only for exposure at home), consumption of tobacco, and educational level. Reference categories: Nobody regularly smokes at home; Regular smokers who do not smoke at home; No close exposure at workplace; Regular smokers who do not smoke at work
  6. f Multinomial logistic regression. Odds ratios adjusted by the same variables as in the binary logistic regression models. First category = 1 is the reference category