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Table 2 Association between smoking status (current, former and secondhand smoke (SHS)) and depressive symptoms

From: Active smoking and exposure to secondhand smoke and their relationship to depressive symptoms in the Korea national health and nutrition examination survey (KNHANES)

Smoking status Depression
No Yes ORa (95 % CI)
N (Weighted %) N (Weighted %)  
Men    
 Smoking status    
 Current    
 No exposure to SHS 3,859 (26.6) 470 (29.8) 1.15 (0.86–1.55)
 SHS at home only 526 (3.7) 85 (6.5) 1.42 (0.92–2.18)
 SHS at workplace only 3,120 (26.2) 339 (25.4) 1.13 (0.83–1.54)
 SHS at both home and workplace 525 (5.0) 75 (6.0) 1.03 (0.69–1.55)
 Former    
 No exposure to SHS 1,752 (10.0) 156 (8.7) 1.01 (0.72–1.41)
 SHS at home only 68 (0.5) 14 (0.7) 1.27 (0.56–2.88)
 SHS at workplace only 907 (7.3) 84 (6.5) 1.17 (0.79–1.71)
 SHS at both home and workplace 51 (0.5) 3 (0.3) 0.59 (0.16–2.16)
 Never    
 No exposure to SHS 1,409 (10.6) 123 (8.1) 1.00 (ref)
 SHS at home only 102 (1.0) 10 (1.0) 1.10 (0.46–2.65)
 SHS at workplace only 889 (7.6) 85 (5.7) 1.12 (0.76–1.64)
 SHS at both home and workplace 96 (1.0) 11 (1.3) 2.05 (0.83–5.10)
Women    
 Smoking status    
 Current    
 No exposure to SHS 630 (4.2) 217 (6.4) 1.25 (1.00–1.56)
 SHS at home only 283 (2.0) 131 (4.4) 1.43 (1.04–1.96)
 SHS at workplace only 214 (1.7) 68 (2.4) 1.26 (0.87–1.83)
 SHS at both home and workplace 142 (1.1) 56 (2.2) 1.57 (0.96–2.55)
 Former    
 No exposure to SHS 283 (2.0) 70 (2.3) 1.04 (0.72–1.51)
 SHS at home only 50 (0.4) 17 (0.9) 2.32 (1.04–5.16)
 SHS at workplace only 71 (0.6) 22 (1.0) 1.60 (0.82–3.13)
 SHS at both home and workplace 22 (0.2) 6 (0.3) 1.73 (0.53–5.62)
 Never    
 No exposure to SHS 9,932 (56.4) 1,985 (48.8) 1.00 (ref)
 SHS at home only 1,782 (12.0) 459 (14.4) 1.25 (1.08–1.43)
 SHS at workplace only 1,993 (13.3) 373 (11.0) 0.99 (0.84–1.17)
 SHS at both home and workplace 805 (6.0) 191 (5.9) 1.12 (0.99–1.40)
  1. aAdjusted for age, marital status, education, employment status, self-reported stress, self-rated health, alcohol dependence (AUDIT) and past diagnosis of depression by physicians
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