Table 2.

Associations between smoking discontinuation and potential predictors in novice adolescent smokers, NDIT study, 1999–2005a

Potential predictorORcrude95% CIORadj95% CICovariates included in multivariable model
Sociodemographic
 SexAge, depression symptoms, participate in vigorous physical activity, worrying about weight, use tobacco products other than cigarettes
  Female (ref)
  Male1.831.36–2.461.761.28–2.41
 Age (years)b0.930.83–1.041.271.09–1.49Sex, other nicotine dependence symptoms, withdrawal symptoms, no. cigarettes smoked per month in past 3 months, illicit drug use, time since smoking initiation
 Language spoken at homeAge, sex, tolerance of smoking in local corner store, tolerance of smoking in local restaurant
  Other (ref)
  French0.860.62–1.210.990.67–1.47
 Single-parent familyAge, sex
  No (ref)
  Yes0.730.48–1.090.760.50–1.15
 Parent(s) university-educatedAge, sex, tolerance of smoking in local corner store
  No (ref)
  Yes1.310.94–1.831.230.87–1.75
Psychosocial indicators
 Family stressb0.650.49–0.850.730.55–0.96Age, sex, depression symptoms, non–family-related stress
 Non–family-related stressb0.780.63–0.970.900.71–1.14Age, sex, family stress, depression symptoms, worrying about weight
 Depression symptomsb0.920.77–1.091.150.94–1.40Age, sex, family stress, non–family-related stress, worrying about weight, self-esteem, self-medication
 Impulsivityb0.990.86–1.140.970.83–1.13Age, sex, tolerance of smoking in local restaurant
 Novelty-seekingb0.900.74–1.090.910.74–1.10Age, sex, impulsivity
 Self-esteemb1.380.93–2.051.280.85–1.93Age, sex, depression symptoms
 Worrying about weightAge, sex, depression symptoms, non–family-related stress
  No (ref)
  Yes0.560.43–0.720.630.47–0.85
 Cigarette package warnings make me afraid to smokeAge, sex
  No (ref)
  Yes1.371.05–1.801.441.10–1.89
 Cigarette ads make me want to smokeAge, sex, other ND symptoms
  No (ref)
  Yes0.670.46–0.990.780.50–1.21
OverweightAge, sex
 No (ref)
 Yes0.730.53–1.010.700.50–0.97
AsthmaAge, sex
 No (ref)
 Yes0.970.65–1.460.960.63–1.47
Lifestyle indicators
 Alcohol useAge, sex
  No (ref)
  Yes0.950.70–1.290.940.69–1.29
 Use tobacco products other than cigarettesAge, sex
  No (ref)
  Yes1.020.81–1.280.900.70–1.15
 Illicit drug useAge, sex, other nicotine dependence symptoms, time since smoking initiation
  No (ref)
  Yes0.430.33–0.570.500.37–0.68
 Participate in light physical activity (LPA)b1.000.96–1.041.020.98–1.06Age, sex
 Participate in moderate physical activity (MPA)b1.001.0–1.021.000.99–1.01Age, sex, participate in vigorous physical activity
 Participate in vigorous physical activity (VPA)b1.021.00–1.041.000.98–1.03Age, sex, participate in moderate physical activity, participate in team sports
 Participate in team sportsAge, sex, participate in vigorous physical activity
  No (ref)
  Yes1.521.16–1.991.441.07–1.92
 TV per week (hours)b1.021.00–1.041.010.99–1.03Age, sex
Smoking and nicotine dependence indicators
 Time since smoking initiationb0.830.79–0.880.950.89–1.02Age, sex, friends smoke, other nicotine dependence symptoms, self-medication, withdrawal symptoms, no. cigarettes smoked per month in past 3 months, illicit drug use
 No. cigarettes smoked per month in past 3 monthsb0.99c0.99–1.001.000.99–1.00Age, sex, other nicotine dependence symptoms, self-medication, withdrawal symptoms, time since smoking initiation
 Toleranceb0.540.37–0.790.640.41–0.99Age, sex, other nicotine dependence symptoms, self-medication
 Other nicotine dependence symptomsb0.910.88–0.940.950.91–0.99Age, sex, tolerance, self-medication, withdrawal symptoms, time since smoking initiation, no. cigarettes smoked per month in past 3 months, cigarette ads make me want to smoke, illicit drug use
 Self-medicationb0.890.84–0.940.980.91–1.06Age, sex, depression symptoms, parent(s) smoke, tolerance, other nicotine dependence symptoms, withdrawal symptoms, no. cigarettes smoked per month in past 3 months, time since smoking initiation
 Withdrawal symptomsb0.770.69–0.860.920.79–1.07Age, sex, other nicotine dependence symptoms, self-medication, no. cigarettes smoked per month in past 3 months, time since smoking initiation
Context-level indicators
Social environment
 Parent(s) smokeAge, sex, self-medication
  No (ref)
  Yes0.710.55–0.920.770.57–1.02
 Sibling(s) smokeAge, sex
  No (ref)
  Yes0.810.62–1.080.820.61–1.09
 Friends smokeAge, sex
  No (ref)
  Yes0.690.45–1.030.730.48–1.12
 Teachers/school staff smoke oftenAge, sex, tolerance of smoking in local restaurant
  No (ref)
  Yes0.860.61–1.220.930.64–1.34
Neighborhood indicators
 Tolerance of smoking at schoolAge, sex, tolerance of smoking in local corner store
  Low/moderate (ref)
  High0.920.68–1.230.800.59–1.10
 Tolerance of smoking in local corner storesb0.690.44–1.100.730.37–1.45Age, sex, tolerance of smoking in local restaurant, tolerance of smoking at school, language spoken at home, parent(s) university-educated
 Tolerance of smoking in local restaurantsb1.830.87–3.861.450.53–3.95Age, sex, tolerance of smoking in local corner store, language spoken at home, impulsivity, teachers/school staff smoke often
  • aThere were 3,862 to 3,921 person-surveys contributed by 248 to 257 participants.

  • bOR indicates the factor by which the 3-month odds of smoking discontinuation changes per one unit change in the given predictor variable. Because all ORs are derived based on unstandardized regression coefficients, the magnitude of the associations cannot be compared across predictors.

  • cModel converged 8 of 10 times.