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. Author manuscript; available in PMC: 2020 Mar 20.
Published in final edited form as: Chem Res Toxicol. 2018 Aug 6;31(8):643–645. doi: 10.1021/acs.chemrestox.8b00160

Table 1 –

Demographic Characteristics of nonusers and exclusive marijuana users in NHANES 2005-2014

Exclusive daily marijuana smokers (per day) a Exclusive ever marijuana smokers b

1-joint 2 joints 3-5 joints ≥ 6 joints Last-month Last-year Never user c
Total, N 25 27 16 5 32 100 1819
Gender, No. (%)
 Male 18 (72) 19 (68) 11 (69) 3 (60) 13 (41) 57 (57) 711 (39)
 Female 7 (28) 8 (32) 5 (31) 2 (40) 19 (59) 43 (43) 1108 (61)
Age, mean (SD), year 34 (3.1) 36 (2.8) 33 (3.5) 27 (2.6) 29 (1.7) 30 (1.3) 39 (0.4)
Race/ethnicity, No. (%)
 Non-Hispanic White 8 (32) 16 (57) 5 (31) 3 (60) 11 (34) 45 (45) 495 (27)
 Non-Hispanic Black 5 (20) 4 (18) 4 (25) 2 (40) 14 (44) 25 (25) 371 (20)
 Mexican American 3 (12) 5 (18) 2 (13) - 4 (13) 16 (16) 443 (25)
 Other race 9 (36) 2 (7) 5 (31) - 3 (9) 14 (14) 510 (28)
a

Participants who self-reported smoked marijuana or hashish daily within the last five days of the survey, but had serum cotinine levels were ≤ 10 ng/mL and never smoked at least 100 cigarettes in life & never smoked any tobacco products within the last five days of the survey.

b

Participants who self-reported ever smoked marijuana or hashish during last month and last year from the time of the survey, but had serum cotinine levels were ≤ 10 ng/mL and never smoked at least 100 cigarettes in life & never smoked any tobacco products within the last five days of the survey.

c

Participants whose serum cotinine levels were ≤ 10 ng/mL and self-reported never used marijuana or hashish & never smoked at least 100 cigarettes in life & never smoked any tobacco products within the last five days of the survey.