Table 2.
The relative hazards of initiating ecstasy use after first initiating marijuana, cocaine and heroin use, respectively (12-21 year olds). Results from separate Cox proportional hazards models with time-dependent covariates, NSDUH 2002-3.
| Drug Initiation | Model 1 | Model 2 | Model 3 | Model 4 | Model 5 | Model 6 |
|---|---|---|---|---|---|---|
| Hazard ratio1 (95%CI) |
Hazard ratio2 (95%CI) |
Hazard ratio3 (95%CI) |
Hazard ratio4 (95%CI) |
Hazard ratio5 (95%CI) |
Hazard ratio6 (95%CI) |
|
| Marjuana Use | ||||||
| Yes | 36.7 (32.0-42.0) | 29.2 (25.5-33.5) | --- | --- | --- | --- |
| No | 1.0 | 1.0 | ||||
| Cocaine Use | ||||||
| Yes | 8.9 (8.1-9.8) | 5.9 (5.3-6.5) | --- | 9.2 (8.4-10.1) | 6.0 (5.4-6.6) | --- |
| No | 1.0 | 1.0 | ||||
| Heroin Use | ||||||
| Yes | 8.8 (6.9-11.2) | 5.1 (4.0-6.5) | --- | 8.0 (6.1-10.4) | 4.7 (3.6-6.1) | --- |
| No | 1.0 | 1.0 | ||||
| 12-17 year olds only | ||||||
| Marjuana Use | ||||||
| Yes | 36.0 (29.4-44.2) | 23.8 (19.3-29.4) | --- | --- | --- | --- |
| No | 1.0 | 1.0 | ||||
| Cocaine Use | ||||||
| Yes | 13.9 (11.3-17.2) | 6.2 (5.0-7.7) | --- | 14.1 (11.3-17.5) | 6.1 (4.9-7.7) | --- |
| No | 1.0 | 1.0 | ||||
| Heroin Use | ||||||
| Yes | 16.3 (10.7-24.3) | 6.8 (4.5-10.4) | --- | 12.8 (7.6-21.4) | 5.5 (3.4-9.0) | --- |
| No | 1.0 | 1.0 | ||||
| 18-21 year olds only | ||||||
| Marjuana Use | ||||||
| Yes | 36.9 (30.7-44.3) | 31.7 (26.3-38.1) | 31.3 (26.1-37.7) | --- | --- | --- |
| No | 1.0 | 1.0 | 1.0 | |||
| Cocaine Use | ||||||
| Yes | 8.1 (7.3-8.9) | 6.0 (5.4-6.7) | 5.9 (5.3-6.5) | 8.4 (7.5-9.3) | 6.1 (5.5-6.8) | 6.0 (5.4-6.7) |
| No | 1.0 | 1.0 | 1.0 | |||
| Heroin Use | ||||||
| Yes | 7.0 (5.2-9.5) | 4.6 (3.4-6.3) | 4.5 (3.3-6.1) | 7.0 (5.1-9.6) | 4.7 (3.4-6.4) | 4.5 (3.3-6.2) |
| No | 1.0 | 1.0 | 1.0 |
1
adjusted for race and sex.
2
adjusted for race, sex and deviant behaviors.
3
adjusted for race, sex, deviant behaviors, and depressive and panic symptoms (mental healthy symptoms only available for those 18 and older).
4
adjusted for race, sex and marijuana initiation.
5
adjusted for race, sex, marijuana initiation and deviant behaviors.
6
adjusted for race, sex, marijuana initiation, deviant behaviors, and depressive and panic symptoms (mental healthy symptoms only available for those 18 and older).