Table 1

 Baseline characteristics of Massachusetts youth cohort* by strength† of local restaurant smoking regulation

n = 2623n = 1584n = 605n = 434
*Cohort includes only youths who were not established smokers (that is, had smoked fewer than 100 cigarettes in their life) at baseline.
†Strength of local restaurant smoking regulation was defined as strong if it banned smoking completely in all restaurants with no variances, medium if it banned smoking but allowed variances or restricted smoking to enclosed, separately ventilated areas, and weak if it required only designated smoking areas or did not restrict smoking at all.
‡Mean percentage shown in each column.
Individual level variables
Age at baseline (years)
    Non-Hispanic white212677.887.287.7
Smoking status
    Non-susceptible non-smoker158161.760.055.3
    Susceptible non-smoker45315.319.321.4
    Current smoker813.32.23.7
Peer smoking
    No close friend smokes194273.676.472.6
    At least one close friend smokes68126.423.627.4
Exposure to anti-smoking messages at school
Household level variables
Household smoking
    No adult smoker in household180466.970.273.5
    Adult smoker in household81933.129.826.5
Education of adult informant
    Not college graduate136756.449.145.6
    College graduate121543.650.954.4
Household income
Town level variables
Percentage of town residents who are college graduates‡42.939.147.750.3
Percentage of town “yes” vote on Question 1‡
Percentage of town residents who are white‡87.985.491.991.9
Percentage of town residents who are youths‡24.624.724.923.6
Number of restaurants