Psychoactive substance abuse among inmates of a Nigerian prison population.

The objectives of the study were: (1) to assess the prevalence rate of psychoactive substance use and dependence among inmates of a Nigerian prison population within the past month; (2) to highlight how aware these prisoners were, of the various drugs of abuse; (3) to compare the findings with those of reports from abroad, and general Nigerian population samples. In mid-1995, 395 subjects (97.5% males, mean age 30.5 years) were interviewed, with a questionnaire that contained DSM-III-R criteria for dependence. About two-thirds were those on remand or awaiting trial, and the majority (70%) were accused of theft and armed robbery. Compared with Nigerian general population samples, the cohort had much higher prevalence rates of awareness and life-time use of psychoactive substances. Cannabis was the only drug regularly abused in the past month, by 26 (6.6%) subjects (all males); out of whom 11 (42.3%) satisfied DSM-III-R criteria for dependence. Use of intravenous drugs was not evident. This pattern differed markedly from the situation in industrialised countries. Cannabis abuse was significantly associated with those in prison for less than six months and on a charge of theft/armed robbery.