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Table 3 Participant Characteristics

From: Design, baseline characteristics, and retention of African American light smokers into a randomized trial involving biological data

  Summary statistics Sample size (n)
Demographic Variables   
   Age, mean [SD] yr 46.5 (11.3) 540
   Women, n (%) 357 (66.1) 540
   Married or living with partner, n (%) 166 (30.8) 539
   Monthly family income < $1800, n (%) 327 (60.7) 539
   Education ≥ High school, n (%) 454 (84.2) 539
   Weight, mean [SD] 195.5 (52.9) 539
   BMI, mean [SD] 31.1 (7.9) 539
Psychosocial Variables   
   Depression (CESD-10), mean [SD] 7.7 (5.2) 539
   Stress (PSS-4), mean [SD] 5.2 (3.2) 539
Tobacco Related Variables   
   Serum cotinine in ng/ml., mean [SD] 275.8 (155.8) 536
   Exhaled carbon monoxide in p.p.m., mean [SD] 16.4 (10.0) 411
   Cigarettes per day, mean [SD] 8.0 (2.5) 540
   Time to first cigarette, ≤30 minutes, n (%) 390 (72.2) 540
   FTND, mean [SD] 3.2 (1.7) 540
   Smoke menthol cigarettes, n (%) 452 (83.7) 540
   Number of previous 24 hour quit attempts in the past year, mean [SD] 3.7 (7.7) 540
   Use of pharmacotherapy during the most recent quit attempt, n (%) 133 (24.2) 511
   Age of first cigarette, mean [SD] yr 17.6 (5.9) 538
   Age started smoking regularly, mean [SD] 21.1 (7.1) 538
   Motivation to quit, mean [SD] 9.7 (0.8) 540
   Confidence to quit, mean [SD] 7.9 (2.4) 540
   Smoke-free household, n (%) 132 (24.4) 540