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Table 2 Various indicators of exposure to ETS among adults non-smokers (n = 1118) in Aleppo, Syria.

From: Extent of exposure to environmental tobacco smoke (ETS) and its dose-response relation to respiratory health among adults

  Non-smokers with CO≤10 ppm n (%)
Spouse's smoking (cigarettes and waterpipe) 351 (43.7)*
Parental smoking  
   None 374 (33.5)
   Father 591 (52.9)
   Mother 36 (3.2)
   Both 117 (10.5)
Number of household smokers  
   Cigarettes ≥ 1 smoker 543 (48.6)
   Waterpipe ≥ 1 smoker 47 (4.2)
   Both ≥ 1 smoker 108 (9.7)
Past year regular exposure to other's smoke 769 (68.8)
Past week sensory irritation from ETS exposure  
   Sometimes 188 (16.8)
   Many times 103 (9.2)
Past week hours spent daily with smokers  
   At home  
≤ 1 hour/day 651 (58.2)
>1 hour/day 467 (41.8)
   At other places  
≤ 1 hour/day 795 (71.1)
>1 hour/day 323 (28.9)
Exposure to smoking at workplace  
   Yes/well ventilated 205 (58.9)*
   Yes/poor ventilated 32 (9.2)*
Average cigarettes smoked daily in the house  
   1–10 cig/day 438 (39.2)
   > 10 cig/day 281 (25.1)
Average waterpipes smoked daily in the house  
   1–2 waterpipe/day 33 (3.0)
   > 2 waterpipe/day 8 (0.7)
House policy regarding smoking  
   Smoking is not allowed at all 40 (3.6)
   Smoking is allowed for only few guests 137 (12.3)
   Smoking is allowed only in special places 106 (9.5)
   Smoking is not restricted at all 812 (72.6)
   Differs between cigarettes and waterpipes 23 (2.1)
  1. * Calculated from the number of non-smokers who are currently married (n = 803), or employed (n = 348)