Table 1 Distributions of the baseline characteristics of the three US National Data Systems aged 16 years and older: drivers from the 2013-14 National Roadside Survey of Alcohol and Drug Use (NRS), US population from the 2013-14 National Survey on Drug Use and Health (NSDUH), homicide victims from the 2013 National Violent Death Reporting System (NVDRS)
Data source | NRS n = 11,314 Frequency (%) | NSDUH n = 43,465 Frequency (%) | NVDRS n = 4,110 Frequency (%) |
|---|---|---|---|
Age (years) | |||
16–20 | 1,069 (11.7) | 3,817 (8.8) | 489 (11.9) |
21–34 | 3,640 (39.8) | 10,414 (24.0) | 1,813 (44.1) |
35–49 | 2,310 (25.2) | 10,751 (24.7) | 997 (24.3) |
50–64 | 1,621 (17.7) | 10,755 (24.7) | 581 (14.1) |
≥65 | 515 (5.6) | 7,728 (17.8) | 230 (5.6) |
Missing | 2,158 | 0 | 0 |
Sex | |||
Male | 6,382 (58.3) | 20,970 (48.2) | 3,340 (81.3) |
Female | 4,566 (41.7) | 22,495 (51.8) | 770 (18.7) |
Missing | 365 | 0 | 0 |
Race | |||
White | 4,952 (55.0) | 28,458 (65.5) | 1,229 (29.9) |
Black | 2,196 (24.4) | 5,131 (11.8) | 2,306 (56.1) |
Hispanic | 1,074 (11.9) | 6,622 (15.2) | 376 (9.1) |
Others | 776 (8.6) | 3,254 (7.5) | 199 (4.8) |
Missing | 2,316 | 0 | 0 |
Education | |||
Less than high school | 715 (7.8) | 5,616 (12.9) | 887 (38.0) |
High school graduate | 2,115 (23.1) | 12,441 (28.6) | 1,055 (45.2) |
Some college | 3,222 (35.2) | 11,365 (26.1) | 248 (10.6) |
College/some graduate | 3,106 (33.9) | 14,043 (32.3) | 145 (6.2) |
Missing | 2,156 | 0 | 1,775 |
Self-reported alcohol use | |||
Yes | 3,811 (58.4) | 23,904 (55.0) | - |
No | 2,720 (41.6) | 19,561 (45.0) | - |
Missing | 4,783 | 0 | 4,110 |
Oral alcohol test | |||
Positive | 234 (2.8) | - | - |
Negative | 8,149 (97.2) | - | - |
Missing | 2,931 | 43,465 | 4,110 |
Blood alcohol test | |||
Positive | 137 (2.7) | - | 1,027 (44.7) |
Negative | 4,926 (97.3) | - | 1,268 (55.3) |
Missing | 6,251 | 43,465 | 1,815 |
Self-reported cannabis use | |||
Yes | 905 (11.7) | 3,417 (7.9) | - |
No | 6,813 (88.3) | 40,048 (92.1) | - |
Missing | 3,596 | 0 | 4,110 |
Oral cannabis test | |||
Positive | 864 (10.3) | - | - |
Negative | 7,519 (89.7) | - | - |
Missing | 2,931 | 43,465 | 4,110 |
Blood cannabis test | |||
Positive | 555 (11.0) | - | 663 (46.8) |
Negative | 4,494 (89.0) | - | 755 (53.2) |
Missing | 6,265 | 43,465 | 2,692 |