An examination of the frequency of substance use across the sample indicated that alcohol and cannabis were the two most common substances used 30-days prior to hospitalization, with 540 (67.0%) and 237 (30.0%) patients respectively reporting use of these substances within 30-days of admission (see Table 2). Heroin was used by a small proportion (N = 148, 18.0%) of patients and the use of other substances was minimal. Few differences were observed with regard to the proportion of patients who used substances 30-days prior to hospitalization. Equivalent proportions of patients with bipolar, depressive, and schizophrenia-spectrum disorders reported using alcohol and cannabis (all p < .379). A greater proportion of patients with depressive and schizophrenia-spectrum disorders reported using heroin within 30-days of hospitalization, compared to patients with bipolar disorders (see Table 2).
