Cumulative probability of remission, defined as the proportion of individuals that achieve remission by a specified time point or interval [28], was obtained for the general population and across racial-ethnic groups for the first year after substance dependence onset, a decade later, and lifetime. The log-rank test was used to determine whether survival curves differed statistically across racial-ethnic groups. These projections were obtained by the standard actuarial method [29] as implemented in SAS (version 9.1.3), (SAS Institute, Cary, N.C.).
