Table 2.

Subject demographics and tobacco use history items (N = 349–359)

CharacteristicsNumber of subjects (%)
Site, N = 359
 Oregon208 (57.9)
 Minnesota112 (31.2)
 West Virginia39 (10.9)
Gender, N = 357
 Male345 (96.6)
Race, N = 357
 White, non-Hispanic331 (92.7)
 Other26 (7.3)
Annual personal income, N = 356
 <$15K130 (36.5)
 15K–30K54 (15.2)
 >30K172 (48.3)
Smoked at least 100 cigarettes, N = 350
 Yes181 (51.7)
 No169 (48.3)
Mean (SD)Median (min/max)
Age, y37.1 (12.6)37 (18/89)
Age when first used snuff17.7 (8.5)16 (4/55)
Number of years using snuff daily13.9 (11.9)10.5 (0/69)
Dependence score8.1 (3.7)8.0 (0/17)
Median dip weight (g)2.3 (1.5)1.9 (0.3/8.8)
Tins per week3.6 (2.2)3 (0.5/14)
Mean dips per day7.0 (3.5)6 (1/25)
Mean duration per dip (minutes)69.3 (42.0)56.9 (4.2/229.2)
Mean daily dip duration (hours)6.8 (3.9)6.5 (0.4/17.4)
TNE, nmol/mg creatinine72.8 (70.9)54.6 (0.1/510.9)
Total NNAL, pmol/mg creatinine3.29 (3.77)2.23 (0.04/29.91)
Total NNN, pmol/mg creatinine0.284 (3.374)0.059 (0.003/63.068)