Table 2

Current smoking and secondhand smoke exposure according to depression

Depression
VariablesNo N (%)Yes N (%)χ2p Value†
Male and female
Current smoking
 Never smoked45 771 (69.1)20 884 (30.9)
 1 cigarette or less per day1266 (57.6)984 (42.4)
 2–9 cigarettes per day2543 (54.2)2233 (45.8)
 10 or more cigarettes per day902 (46.8)1060 (53.2)973.499<0.001***
Secondhand smoke exposure
 No exposure31 491 (70.6)13 425 (29.4)
 1–4 days per week13 147 (64.9)7188 (35.1)
 5 or more days per week5844 (56.7)4548 (43.3)791.501<0.001***
Male
Current smoking
 Never smoked23 500 (74.7)8022 (25.3)
 1 cigarette or less per day969 (66.4)512 (33.6)
 2–9 cigarettes per day2043 (59.8)1371 (40.2)
 10 or more cigarettes per day754 (51.8)702 (48.2)703.657<0.001***
Secondhand smoke exposure
 No exposure17 233 (74.9)5826 (25.1)
 1–4 days per week7123 (69.5)3098 (30.5)
 5 or more days per week2910 (63.2)1683 (36.8)302.983<0.001***
Female
Current smoking
 Never smoked22 271 (63.7)12 862 (36.3)
 1 cigarette or less per day297 (38.0)472 (62.0)
 2–9 cigarettes per day500 (36.9)862 (63.1)
 10 or more cigarettes per day148 (28.8)358 (71.2)780.817<0.001***
Secondhand smoke exposure
 No exposure14 258 (65.6)7599 (34.4)
 1–4 days per week6024 (59.6)4090 (40.4)
 5 or more days per week2934 (51.0)2865 (49.0)438.810<0.001***
  • ***p<0.001.

  • †By χ2 test.