Table 4

Logistic regression models for predictors of high smoking persistence†

TotalYounger men (18–39)Older men (40+)
OR (95% CI)OR (95% CI)OR (95% CI)
Survey year
 2010 (vs 2008)1.77 (1.29 to 2.41)*2.22 (1.46 to 3.37)*1.46 (0.89 to 2.39)
Time-in-sample (vs once)
 Twice1.02 (0.77 to 1.33)1.21 (0.85 to 1.72)0.82 (0.52 to 1.28)
 Three times0.41 (0.27 to 0.61)*0.32 (0.18 to 0.56)*0.49 (0.26 to 0.92)*
Age (vs referent)
 18–291.71 (0.95 to 3.08)1.11 (0.76 to 1.62)
 30–391.57 (0.94 to 2.63)Referent
 40–491.17 (0.69 to 1.99)1.24 (0.69 to 2.20)
 50–590.97 (0.55 to 1.70)1.01 (0.57 to 1.81)
 60+ReferentReferent
Marital status
 Without partner (vs with partner)0.68 (0.50 to 0.93)*0.66 (0.45 to 0.96)*0.77 (0.44 to 1.35)
Education
 College or more (vs high school or less)1.58 (1.25 to 2.00)*1.42 (1.05 to 1.93)*1.95 (1.32 to 2.88)*
Household income, KRW/year
 30 million+ (vs below 30 million)1.01 (0.80 to 1.29)1.18 (0.87 to 1.61)0.77 (0.51 to 1.17)
Good self-rated health
 Yes (vs no)0.95 (0.75 to 1.21)0.94 (0.69 to 1.29)0.97 (0.65 to 1.46)
Worries about health effect of smoking
 Yes (vs no)0.80 (0.64 to 1.00)*0.83 (0.62 to 1.12)0.72 (0.51 to 1.03)
Attempting smoking cessation
 Ever (vs never)0.78 (0.59 to 1.04)1.02 (0.71 to 1.46)0.49 (0.30 to 0.81)*
Smoked cigarettes per day (vs ≤10)
 11–201.18 (0.92 to 1.51)1.14 (0.84 to 1.56)1.28 (0.83 to 1.99)
 ≥212.40 (1.62 to 3.57)*3.57 (1.91 to 6.68)*2.09 (1.17 to 3.71)*
Purchased cigarette price, KRW/per pack‡
 Higher vs 2500 vs lower1.18 (0.92 to 1.52)1.41 (0.96 to 2.06)1.03 (0.73 to 1.46)
Awareness of cigarette warning labels
 Yes (vs no)1.01 (0.81 to 1.27)0.91 (0.68 to 1.22)1.19 (0.82 to 1.72)
Notice antismoking advertising or information
 Yes (vs no)0.90 (0.69 to 1.17)1.10 (0.79 to 1.54)0.61 (0.38 to 0.98)*
Local stop-smoking services use
 Yes (vs no)0.73 (0.50 to 1.06)0.94 (0.55 to 1.62)0.58 (0.34 to 1.00)*
Smoke-free workplace and restaurants
 Yes (vs no)0.90 (0.70 to 1.16)1.02 (0.73 to 1.43)0.74 (0.49 to 1.12)
  • *p<0.05.

  • †Defined by the individual's price to quit being greater than the overall median (5854KRW).

  • ‡Coded as ordinal levels of 2 (higher), 1 (2500) and 0 (lower), respectively.

  • KRW, Korean Won.