Table 2.

Characteristics of Nonsmokers, Tobacco-only Smokers, and Marijuana Smokers: NHANES III, 1988 to 1994

Variable	Nonsmokers (n =4,789)	Tobacco Smokers (n =1,525)	Marijuana Smokers (n =414)
Gender, % male*†	36.6	50.0	77.0
Race, % white*†	65.3	73.6	78.8
Education*†
<12 years	22.0	34.9	27.6
12 years	32.4	39.2	39.2
>12 years	45.6	25.9	33.1
Mean age, y (±SE)*†	34.7 (0.31)	41.5 (0.52)	31.2 (0.65)
Marital status, % married*†	83.7	75.0	79.8
Income, %*†
<$10,000	15.8	22.3	17.6
$10,000 to $29,000	34.2	37.7	49.7
$30,000 to $59,000	23.1	19.6	18.2
>$59,000	26.9	20.3	14.5

^*Nonsmokers versus marijuana smokers, P<.05.

^†Nonsmokers versus tobacco smokers, P<.05.

NHANES III, third National Health and Nutrition Examination Survey; SE, standard error.