“…Details on the included studies are presented in Table 1. Of the 16 publications included in the pooled analysis, two [32,35] were conducted among inpatients (n = 1,794), one [36] was conducted in an outpatient setting (n = 72), two [40,42] were conducted in mixed samples (n = 5,295) and eleven [31,33,34,36,37,39,41,[43][44][45]47] included community patients (n = 151,673). Only three studies [32,34,38] (n = 933) reported the prevalence of participants that smoked, and 47.8% of patients with MDD in these studies were smokers.…”