A longitudinal cross-lagged panel design was used to inspect SOC and self-reported frequency of substance use of tobacco, alcohol, and cannabis over the course of ten years.
Contrary to previous research that utilized people who used substances but did not have SMI as their comparison group (Gonzalez et al., 2007), we found that, adjusting for type and frequency of substance use, adults at risk of SMI experienced more negative consequences than people not at risk.
Boxplots were used for graphical representation of the differences in frequency of substance use.
At the same time, there was no effect of therapy on the frequency of substance misuse.
The frequency of substance use also will be related to function in general.
The main difference between HR individuals and HV was frequency of substance use.
Quantitative outcomes (frequency of substance use) were analysed using a random effects model.
Future studies examining longitudinally the substance use trajectories focusing on the frequency of substance use are warranted.
Finally, use of alcohol and drugs will be measured by asking questions about quantity and frequency of substance use.
Absconding was often described as impulsive in nature and accompanied by a high frequency of substance use.
Wilcoxon signed rank test was employed for non-normally distributed continuous variables (age of lifetime first substance use, frequency of substance use).
