TABLE 1

Prevalence Estimates and PRs for NMUPD by Demographic Characteristics and Substance Use Among US High School Students, Youth Risk Behavior Surveillance System, 2011 to 2013

CharacteristicTotal SampleEver Took Prescription Drugs Without a Doctor’s Prescription
n (%)an (%)aPR95% CI
Total29 008 (100)5373 (19.3)
Sex
 Female14 329 (49.2)2382 (18.5)Referent
 Male14 606 (50.8)2718 (20.0)1.081.00–1.17
Race/ethnicity
 Whiteb11 620 (56.3)725 (20.9)Referent
 Blackb5760 (14.2)2419 (14.1)0.670.59–0.77
 Hispanic8022 (20.5)1388 (19.3)0.920.82–1.03
Grade
 97362 (27.5)989 (14.5)Referent
 106845 (25.8)1154 (17.8)1.221.05–1.42
 117317 (23.9)1400 (22.1)1.521.35–1.72
 127256 (22.9)1522 (23.5)1.621.44–1.81
Ever drank alcohol
 No8342 (31.4)276 (3.2)Referent
 Yes18 930 (68.6)4636 (26.7)8.306.95–9.92
Ever used marijuana
 No16 165 (59.7)888 (5.7)Referent
 Yes12 004 (40.3)4065 (38.9)6.826.12–7.59
Ever used inhalants
 No25 073 (89.8)3565 (15.0)Referent
 Yes2852 (10.2)1481 (57.6)3.843.56–4.13
Ever used ecstasy
 No25 457 (92.6)3481 (14.8)Referent
 Yes2167 (7.4)1516 (75.4)5.084.72–5.47
Ever used cocaine
 No26 763 (93.8)3789 (15.3)Referent
 Yes1832 (6.2)1271 (77.8)5.084.65–5.54
Ever used methamphetamines
 No27 307 (96.4)4299 (17.1)Referent
 Yes983 (3.5)749 (82.1)4.804.43–5.19
Ever used heroin
 No26 612 (97.4)4458 (17.8)Referent
 Yes712 (2.6)535 (80.8)4.534.17–4.93
Ever injected any illegal drug
 No26 831 (98.0)4519 (18.1)Referent
 Yes588 (2.0)440 (80.9)4.484.16–4.82
  • a Sample n is unweighted; percentage is weighted.

  • b Non-Hispanic.