TABLE 1

Characteristics of research subjects (mean, 95% CI)




All Subjects (n = 14)

African-Americans (n = 7)

Whites (n = 7)

p
Age 37.7 (31.6-43.9) 40.3 (31.9-48.7) 35.1 (23.9-46.4) 0.39
Gender (% men) 86% 86% 86%
Body weight (kg) 84.0 (74.0-93.9) 89.0 (72.9-105.1) 78.9 (63.5-94.4) 0.29
Usual brand 7 M/7 NM 5 M/2 NM 2 M/5 NM
Cigarettes/day 25.2 (21.3-29.1) 25.3 (21.1-29.5) 25.1 (16.9-33.4) 0.97
Admission plasma cotinine (ng/ml) 286 (221-351) 313 (194-432) 259 (172-347) 0.39
Years smoking 17.5 (11.9-23.1) 17.1 (7.7-26.6) 17.9 (8.7-27.1) 0.90
Fagerström Score 6.7 (5.5-7.8) 6.3 (4.5-8.0) 7.2 (5.2-9.2) 0.40
FTC nicotine of usual brand 1.1 (0.9-1.2) 1.2 (0.9-1.4) 1.0 (0.7-1.3) 0.25
FTC tar of usual brand 15.8 (12.9-18.7) 16.7 (13.7-19.6) 15.0 (8.7-21.3) 0.55
FTC CO of usual brand
15.2 (13.7-16.6)
16.3 (14.0-18.7)
14.0 (12.1-15.9)
0.07
  • M, menthol; NM, nonmenthol; FTC, Federal Trade Commission machine-determined yield.