Table 3 Predictors of a positive THC test in survey reported non-users: Unadjusted and adjusted odds ratiosa
Unadjusted OR (95% CI) | Multivariable Adjusted OR (95% CI) | |
|---|---|---|
Demographic Characteristics | ||
Age (yrs) | ||
16–17 | Ref | |
18–19 | 1.84 (0.75, 4.47) | |
Gender | ||
Female | Ref | |
Male | 1.86 (0.89, 3.90) | |
Race/Ethnicity | ||
White, Non-Hispanic | Ref | |
Black, Non-Hispanic | 1.58 (0.69, 3.59) | |
Hispanic | 0.41 (0.10, 1.78) | |
Region | ||
South | Ref | |
Northeast | 2.65 (0.88, 7.96) | |
Midwest | 2.40 (0.93, 6.20) | |
West | 1.09 (0.37, 3.23) | |
Education level | ||
Less than high school | Ref | |
High school graduate | 1.38 (0.62, 3.04) | |
College | 0.81 (0.35, 1.89) | |
Other | 1.60 (0.18, 14.0) | |
Vocational status | ||
Employed, full time | 2.04 (0.98, 4.28) | |
Employed, part time | Ref | |
Not employed, student | 1.0 (0.36, 2.81) | |
Unemployed, not student | 2.27 (0.61, 8.45) | |
Other | 0.63 (0.14, 2.83) | |
Household income | ||
0 < $25,000 | Ref | |
$25,001 < $50,000 | 0.78 (0.33, 1.82) | |
$51,001 < $75,000 | 0.82 (0.33, 2.06) | |
$75,001 or more | 0.55 (0.23, 1.32) | |
Time of year | ||
June–August | Ref | Ref |
September–March | 2.50 (1.09, 5.76) | 3.04 (1.28, 7.24) |
Substance use | ||
Tobacco use | ||
Beyond a year/Never | Ref | Ref |
Within a month/Year | 1.07 (0.39, 2.94) | 1.11 (0.40, 3.10) |
Past 24 h | 2.65 (1.32, 5.31) | 3.49 (1.67, 7.27) |
Number of alcoholic drinks consumed in an average week | ||
0 or less than once a week | Ref | |
1–2 times | 1.16 (0.39, 3.41) | |
3–4 times | 3.55 (0.71, 17.74) | |
Self-reported age at first alcohol use (yrs) | ||
No use | Ref | |
≤ 15 | 2.39 (0.97, 5.91) | |
16–17 | 1.40 (0.58, 3.38) | |
18–19 | 0.86 (0.25, 2.96) | |
State Medical Marijuana Law (MML) characteristics | ||
States without MMLs | 3.44 (1.03, 11.49) | 3.67 (1.08, 12.46) |
States with MMLs & state-regulated dispensaries | 4.17 (1.04, 16.71) | 5.0 (1.20, 20.76) |
States with MMLs & additional leniency provisions | Ref | Ref |
Passengers (Y, N) | ||
Absent | Ref | Ref |
Present | 2.22 (1.12, 4.38) | 2.42 (1.20, 4.89) |