BDNF and psychiatric disorder: No association was found for cocaine consumption (p = 0.519), older age (p = 0.864), having sons (p = 0.483), marital status (married vs. single, p = 0.482; and divorced vs. single; p = 0.608), employment (p = 0.320), psychopharmaceuticals intake (p = 0.324), previous psychiatric hospitalization (p = 0.817), previous psychiatric disorder diagnosis (p = 0.308), smoking habit (p = 0.285) and higher BDNF levels (p = 0.366).