Table 3.
Sociodemographic and drug use characteristics according to whether a hair sample was provided.
| Raw Proportions | Multivariable Model | ||||
|---|---|---|---|---|---|
| Did Not Provide a Sample, % (n) |
Provided a Sample, % (n) |
Χ2 | aOR | 95% CI | |
| Age | 0.15 | ||||
| 18–24 (reference) | 45.9 (285) | 44.6 (139) | |||
| 25–40 | 54.1 (336) | 55.4 (173) | |||
| Sex | 0.24 | ||||
| Male (reference) | 52.0 (323) | 50.3 (157) | |||
| Female | 48.0 (298) | 49.7 (155) | |||
| Race/Ethnicity | 8.17 | ||||
| White (reference) | 54.1 (336) | 60.6 (189) | 1.00 | ||
| Black | 7.4 (46) | 8.3 (26) | 1.20 | (0.71, 2.04) | |
| Hispanic | 18.4 (114) | 17.6 (55) | 0.85 | (0.58, 1.25) | |
| Asian | 13.5 (84) | 7.7 (24) | 0.53* | (0.32, 0.87) | |
| Other/Mixed | 6.6 (41) | 5.8 (18) | 0.76 | (0.42, 1.38) | |
| Education | 2.11 | ||||
| High School or Less (reference) | 12.2 (76) | 14.1 (44) | |||
| Some College | 27.5 (171) | 28.9 (90) | |||
| College Degree | 44.9 (279) | 44.9 (140) | |||
| Graduate School | 15.3 (95) | 12.2 (38) | |||
| Sexual Orientation | 10.01** | ||||
| Heterosexual (reference) | 82.5 (512) | 78.2 (244) | 1.00 | ||
| Gay/Lesbian | 7.9 (49) | 5.5 (17) | 0.54 | (0.29, 1.01) | |
| Bisexual/Other Sexuality | 9.7 (60) | 16.4 (51) | 1.47 | (0.97, 2.25) | |
| Level of EDM Party Attendance | 5.29 | ||||
| Never /Couple of Times per Year (reference) | 22.2 (138) | 18.3 (57) | |||
| Every Couple of Months | 26.6 (165) | 25.6 (80) | |||
| Monthly | 17.9 (111) | 20.8 (65) | |||
| Biweekly | 18.5 (115) | 16.4 (51) | |||
| Weekly or More Often | 14.8 (92) | 18.9 (59) | |||
| Type of Venue Where Surveyed | 3.53 | ||||
| Nightclub (reference) | 72.3 (449) | 66.4 (207) | 1.00 | ||
| Festival | 27.7 (172) | 33.6 (105) | 1.39* | (1.02, 1.89) | |
| Past-Year Drug Use | |||||
| Ecstasy/MDMA/Molly | 7.41** | ||||
| No (reference) | 65.9 (409) | 56.7 (177) | 1.00 | ||
| Yes | 34.1 (212) | 43.3 (135) | 1.12 | (0.79, 1.59) | |
| LSD | 17.68*** | ||||
| No (reference) | 78.7 (489) | 66.0 (206) | 1.00 | ||
| Yes | 21.3 (132) | 34.0 (106) | 1.62* | (1.11, 2.35) | |
| Powder Cocaine | 3.92* | ||||
| No (reference) | 66.8 (415) | 60.3 (188) | 1.00 | ||
| Yes | 33.2 (206) | 39.7 (124) | 0.88 | (0.62, 1.27) | |
| Opioids (nonmedical) | 15.11*** | ||||
| No (reference) | 91.8 (570) | 83.3 (260) | 1.00 | ||
| Yes | 8.2 (51) | 16.7 (52) | 1.93** | (1.25, 2.99) | |
| Methamphetamine | 10.70*** | ||||
| No (reference) | 98.7 (613) | 95.2 (297) | 1.00 | ||
| Yes | 1.3 (8) | 4.8 (15) | 3.43** | (1.36, 8.62) | |
Note. aOR = adjusted odds ratio (controlling for all covariates); CI = confidence interval. Asterisks next to covariate name indicate significance in bivariable model. Only bivariable findings that were significant or approached significance (p < .10) were included in the multivariable model.
*
p < .05
**
p < .01
***
p < .001