Table 3

Tobit regression models for predictors of price to quit

TotalYounger men (18–39)Older men (40+)
β (95% CI)β (95% CI)β (95% CI)
Survey year
 2010 (vs 2008)0.15 (0.05 to 0.25)*0.19 (0.06 to 0.32)*0.11 (−0.05 to 0.27)
Time-in-sample (vs once)
 Twice0.04 (−0.05 to 0.13)0.11 (−0.01 to 0.22)−0.05 (−0.20 to 0.10)
 Three times−0.17 (−0.30 to −0.04)*−0.22 (−0.38 to −0.05)*−0.13 (−0.33 to 0.07)
Age (vs referent)
 18–290.21 (0.02 to 0.40)*0.02 (−0.14 to 0.10)
 30–390.23 (0.06 to 0.39)*Referent
 40–490.06 (−0.11 to 0.23)0.08 (−0.11 to 0.27)
 50–590.01 (−0.18 to 0.18)0.02 (−0.17 to 0.20)
 60+ReferentReferent
Marital status
 Without partner (vs with partner)−0.14 (−0.24 to −0.04)*−0.16 (−0.27 to −0.04)*−0.09 (−0.27 to 0.10)
Education
 College or more (vs high school or less)0.14 (0.06 to 0.21)*0.11 (0.02 to 0.21)*0.19 (0.07 to 0.32)*
Household income, KRW/year
 30 million+ (vs below 30 million)0.02 (−0.06 to 0.10)0.05 (−0.05 to 0.15)−0.04 (−0.17 to 0.09)
Good self-rated health
 Yes (vs no)−0.04 (−0.12 to 0.04)−0.03 (−0.13 to 0.07)−0.04 (−0.17 to 0.09)
Worries about health effect of smoking
 Yes (vs no)−0.13 (−0.20 to −0.05)*−0.13 (−0.22 to −0.03)*−0.13 (−0.25 to −0.01)*
Attempting smoking cessation
 Ever (vs never)−0.01 (−0.10 to 0.09)0.09 (−0.02 to 0.20)−0.18 (−0.34 to −0.03)*
Smoked cigarettes per day (vs ≤10)
 11–200.05 (−0.03 to 0.13)0.04 (−0.06 to 0.13)0.07 (−0.07 to 0.21)
 ≥210.35 (0.22 to 0.47)*0.41 (0.23 to 0.59)*0.32 (0.13 to 0.50)*
Purchased cigarette price, KRW/per pack†
 Higher vs 2500 vs lower0.13 (0.05 to 0.21)*0.24 (0.12 to 0.35)*0.04 (−0.07 to 0.15)
Awareness of cigarette warning labels
 Yes (vs no)−0.04 (−0.11 to 0.03)−0.07 (−0.16 to 0.03)0.01 (−0.11 to 0.13)
Notice antismoking advertising or information
 Yes (vs no)−0.00 (−0.09 to 0.08)0.05 (−0.06 to 0.15)−0.08 (−0.25 to 0.07)
Local stop-smoking services use
 Yes (vs no)−0.14 (−0.26 to −0.02)*−0.18 (−0.35 to −0.01)*−0.09 (−0.26 to 0.08)
Smoke-free workplace and restaurants
 Yes (vs no)−0.07 (−0.16 to 0.01)−0.03 (−0.14 to 0.07))−0.12 (−0.26 to 0.01)
  • *p<0.05.

  • †Coded as ordinal levels of 2 (Higher), 1 (2500) and 0 (Lower), respectively.

  • KRW, Korean Won.