Table 3

ORs for depression by current smoking and secondhand smoke exposure

VariablesOR(95% CI)OR*(95% CI)OR†(95% CI)
Male and female
Current smoking
 (1 cigarette or less per day/no)1.57(1.44 to 1.72)1.54(1.41 to 1.69)‡1.44(1.31 to 1.59)§
 (2–9 cigarettes per day/no)1.77(1.65 to 1.90)1.58(1.47 to 1.70)‡1.50(1.40 to 1.62)§
 (10 or more cigarettes per day/no)2.27(2.07 to 2.49)1.89(1.71 to 2.10)‡1.69(1.51 to 1.88)§
Secondhand smoke exposure
 (1–4 days per week/no)1.27(1.22 to 1.32)1.25(1.20 to 1.30)‡1.22(1.17 to 1.27)§
 (5 or more days per week/no)1.68(1.60 to 1.76)1.54(1.47 to 1.61)‡1.36(1.29 to 1.43)§
Male
Current smoking
 (1 cigarette or less per day/no)1.44(1.29 to 1.62)1.30(1.16 to 1.47)1.27(1.12 to 1.43)
 (2–9 cigarettes per day/no)1.87(1.73 to 2.03)1.49(1.37 to 1.62)1.43(1.31 to 1.57)
 (10 or more cigarettes per day/no)2.51(2.25 to 2.80)1.82(1.61 to 2.05)1.61(1.42 to 1.82)
Secondhand smoke exposure
 (1–4 days per week/no)1.28(1.21 to 1.34)1.26(1.20 to 1.33)1.24(1.18 to 1.32)
 (5 or more days per week/no)1.49(1.38 to 1.61)1.44(1.34 to 1.56)1.31(1.21 to 1.42)
Female
Current smoking
 (1 cigarette or less per day/no)2.65(2.29 to 3.08)2.16(1.85 to 2.52)1.88(1.61 to 2.19)
 (2–9 cigarettes per day/no)2.78(2.48 to 3.12)1.97(1.74 to 2.23)1.76(1.55 to 1.99)
 (10 or more cigarettes per day/no)3.80(3.11 to 4.65)2.50(2.01 to 3.11)2.17(1.73 to 2.74)
Secondhand smoke exposure
 (1–4 days per week/no)1.25(1.18 to 1.32)1.23(1.16 to 1.29)1.18(1.12 to 1.25)
 (5 or more days per week/no)1.68(1.57 to 1.79)1.61(1.51 to 1.72)1.39(1.30 to 1.50)

  • *Adjusted for age and alcohol consumption.

  • †Additionally adjusted for age, alcohol consumption, socioeconomic status, stress and family live together.

  • ‡Adjusted for age, sex and alcohol consumption.

  • §Additionally adjusted for age, sex, alcohol consumption, socioeconomic status, stress and family live together.