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.
Relationship between estimated values of log(k) and β for each group, based on separate estimates of the CGT and DDT models (2-factor model).
| Group | r (linear) | p-value (linear) | ρ (rank) | p-value (rank) |
|---|---|---|---|---|
| Control | .10 | .23 | .11 | .19 |
| Heroin | −.02 | .83 | −.04 | .74 |
| Amphetamine | .14 | .22 | .23 | .06 |
| Polysubstance | −.02 | .83 | .02 | .87 |
