Table 4. Correlates of Past-Year Frequent Methamphetamine Use Among Adults Aged 18-64 Yearsa .
| Correlate | Adjusted prevalence of frequent (≥100 d in past 12 mo) methamphetamine use, weighted % (95% CI) | Frequent (≥100 d in past 12 mo) methamphetamine use, ARR (95% CI) |
|---|---|---|
| NSDUH year | ||
| 2015 | 41.56 (25.55-47.83)b | 0.82 (0.68-0.99)b |
| 2016 | 43.90 (37.18-50.85) | 0.87 (0.71-1.06) |
| 2017 | 42.40 (35.15-49.99) | 0.84 (0.70-1.01) |
| 2018 | 45.97 (39.55-52.53) | 0.91 (0.76-1.10) |
| 2019 | 50.44 (43.09-57.76) | 1 [Reference] |
| Age group, y | ||
| 18-23 | 34.75 (28.41-41.68) | 1 [Reference] |
| 24-34 | 41.19 (36.34-46.22) | 1.19 (0.97-1.45) |
| 35-49 | 46.47 (41.13-51.89)b | 1.34 (1.09-1.64)b |
| 50-64 | 55.74 (46.10-64.96)b | 1.60 (1.24-2.08)b |
| HBV or HCV | ||
| Yes | 57.94 (47.65-67.58)b | 1.33 (1.10-1.60)b |
| No | 43.69 (39.78-47.68) | 1 [Reference] |
| STI in past year | ||
| Yes | 56.76 (48.29-64.85)b | 1.29 (1.09-1.54)b |
| No | 43.91 (39.83-48.08) | 1 [Reference] |
| MDE in past year | ||
| Yes | 40.04 (33.93-46.48)b | 0.84 (0.71-0.99)b |
| Did not answer | 30.89 (16.86-49.62) | 0.65 (0.38-1.10) |
| No | 47.56 (43.24-51.92) | 1 [Reference] |
| Alcohol use and use disorder in past year | ||
| Alcohol use disorder | 34.96 (28.38-42.18)b | 0.74 (0.60-0.92)b |
| No alcohol use disorder, but had alcohol use | 48.91 (44.23-53.60) | 1.04 (0.89-1.20) |
| No alcohol use | 47.19 (40.85-53.62) | 1 [Reference] |
| Cocaine use in past year | ||
| Yes | 33.48 (27.89-39.57)b | 0.66 (0.55-0.80)b |
| No | 50.45 (45.88-55.02) | 1 [Reference] |
| Hallucinogen use in past year | ||
| Yes | 54.65 (48.36-60.79)b | 1.28 (1.12-1.47)b |
| No | 42.70 (38.51-47.01) | 1 [Reference] |
| Methamphetamine use, MUD, or injection in past year | ||
| Use without MUD or injection | 32.59 (28.12-37.41) | 1 [Reference] |
| MUD without injection | 53.84 (47.82-59.76)b | 1.65 (1.42-1.92)b |
| Injection regardless of MUD | 52.68 (45.50-59.75)b | 1.62 (1.35-1.94)b |
Abbreviations: ARR, adjusted risk ratio; HBV, hepatitis B virus; HCV, hepatitis C virus; MDE, major depressive episode; MUD, methamphetamine use disorder; NSDUH, National Survey on Drug Use and Health; STI, sexually transmitted infection.
a
Data source: the 2015 to 2019 NSDUH.4
b
Each estimate was statistically significantly different from the estimate of the reference group within the same cell. The final multivariable multinomial logistic regression model included all of the variables presented in this table. Covariates shown in Table 2 and Table 3, but not in Table 4, were not associated with the outcome and were removed from the final model.