Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Hazard Ratios for Onset of Psychosis, Using Frequency of Use as a Time-Dependent Covariate (Testing the Effects of Progression of Use)
| Frequency of Use | Substance | ||
|---|---|---|---|
| Cannabis | Alcohol | Tobacco | |
| None | 1.000 | 1.000 | 1.000 |
| Ever | 1.280 | 1.507 | 1.532 |
| Weekly | 1.220 | 1.459 | 1.479 |
| Daily | 1.997* | 1.212 | 1.796* |
significant difference compared to “None” reference category
