Table 2 Sensitivity and specificity of self-reported cannabis and alcohol use from the NRS data sample with complete pairs of self-reported use and blood test for both cannabis and alcohol, stratified by age, sex, race, and education
Cannabis use | Alcohol use | |||||
|---|---|---|---|---|---|---|
n | Sens (%) | Spec (%) | n | Sens (%) | Spec (%) | |
Overall | ||||||
All-inclusive | 4,221 | 62 | 94 | 3,022 | 88 | 47 |
Age (years) | ||||||
16–20 | 439 | 66 | 88 | 235 | 100 | 58 |
21–34 | 1,762 | 63 | 91 | 1,441 | 86 | 40 |
35–49 | 1,039 | 62 | 98 | 744 | 88 | 53 |
50–64 | 755 | 44 | 98 | 480 | 91 | 52 |
≥65 | 226 | 100 | 99 | 122 | 100 | 52 |
Sex | ||||||
Male | 2,361 | 66 | 94 | 1,714 | 90 | 40 |
Female | 1,860 | 56 | 94 | 1,308 | 83 | 57 |
Race | ||||||
White | 2,436 | 66 | 94 | 1,760 | 95 | 47 |
Black | 931 | 56 | 94 | 670 | 71 | 46 |
Hispanic | 434 | 70 | 96 | 301 | 90 | 53 |
Others | 428 | 62 | 95 | 291 | 100 | 46 |
Education | ||||||
Less than high school | 254 | 55 | 96 | 145 | 100 | 54 |
High school graduate | 970 | 63 | 95 | 646 | 82 | 53 |
Some college | 1,600 | 60 | 93 | 1,175 | 84 | 46 |
College/some graduate | 1,397 | 67 | 95 | 1,056 | 95 | 45 |