TABLE 1

Characteristics of the Baseline and Analytic Samples

Baseline SampleAnalytic Sample
Adolescent demographicsn = 559n = 406
 Gender
  Male267 (47.8)194 (47.8)
  Female292 (52.2)212 (52.2)
 Race
  Non-Hispanic white474 (84.8)350 (86.2)
  Nonwhite85 (15.2)56 (13.8)
 Baseline age, mean (SD)14.0 (1.7)14.2 (1.6)
Parent demographics
 Gender
  Male124 (22.2)85 (20.9)
  Female435 (77.8)321 (79.1)
 Race
  Non-Hispanic white474 (84.8)351 (86.4)
  Nonwhite85 (15.2)55 (13.6)
 Baseline age, mean (SD)39.6 (1.9)39.6 (1.9)
 Marital status
  Married402 (71.9)298 (73.4)
  Unmarried157 (28.1)108 (26.6)
 Educational attainment
  ≥College degree105 (18.8)70 (17.2)
  <College education454 (81.2)336 (82.8)
 Household income
  <$60 000/y255 (45.6)183 (45.1)
  ≥$60 000/y304 (54.4)223 (54.9)
Parental smoking
  Nonsmoker220 (40.0)167 (41.7)
  Former daily or weekly smoker176 (31.9)126 (31.5)
  Current, nondependent71 (12.9)47 (11.8)
  Current, dependent84 (15.2)60 (15.0)
  • Some cells do not at up to the total sample size due to sporadic missing data for <5% of participants for individual variables. Values are n (%) unless otherwise noted.