Study design
This was a descriptive cross-sectional study carried out at Benue State Makurdi Medium Security Correctional Facility. Data were collected between August and September 2017.
Setting and population
Makurdi Medium Security Correctional Facility
Makurdi Medium Security Correctional Facility was commissioned in 2001 under the oversight of the Controller of Prisons, Benue State Command. Facilities comprise an administrative block, records section, gate lodge, welfare section, industrial workshop and a medical unit, as well as a prison yard with some recreational facilities (such as a football pitch). While the original proposed inmate capacity was 240, the facility currently holds around 900, the majority of whom are awaiting trial.
The medical unit has one general duty doctor, a pharmacist, a clinical psychologist, two laboratory technicians, five nurses, two Community Health Extension Workers and two auxiliary nurses. There is no psychiatrist, psychiatric nurse, social worker or occupational therapist on staff. Psychotropic medications are not available in the facility. The correctional facility reports that psychosocial services available include general counseling, exercise and skill acquisition. Health talks are also given to inmates who attend the clinic. These services are provided by health center staff. Christian organizations that visit the facility offer prayers and administer anointing oil. No service user organization or self-help group is in existence at the facility. Some inmates with mental illnesses are referred on occasion to the psychiatric clinic of the Federal Medical Centre, Makurdi for evaluation, treatment and court reports.
Sample
Sample size determination
Using the Cochran formula for populations greater than 10,000 (z2pq/d2), where precision at 5%, z=A constant at 95%, confidence interval=1.96 and N=target population and using a prevalence of 34% , the calculated sample size inflated by 10% to account for any potential retrospective withdrawal of consent resulted in a total calculated sample size of 381[25].
Eligibility criteria
Adult (age 18+) men and women were eligible for inclusion if they were inmates at the Benue State Makurdi Medium Security Correctional Facility at the time of the survey. Prisoners who did not give written informed consent to participate in the study were excluded.
Selection
From the correctional facility record, a register containing the names of all the eligible inmates was created. There were 902 names on the register. These were coded from 001 to 902. On pieces of paper, numbers ranging from 001 to 902 were written, and were then rumpled. The papers were shaken. The first 381 numbers were picked through simple random sampling by replacement. The register was restricted only to the Principal Investigator and utilized solely for the recruitment and interview process. At the end of the exercise, the master list was shredded. These steps were taken to guarantee respondent anonymity.
Instruments
The study instruments include a structured questionnaire and Patient Health Questionnaire 9 (PHQ-9). Instruments were translated from English into Tiv and then back-translated into English. The original English versions were then compared against the back-translated versions to check for accuracy. Minor differences were resolved by the bilingual translators to produce the final consensus versions that were used in this study.
Structured questionnaire
The structured questionnaire was adapted from an earlier developed prison questionnaire for Nigeria [17]. It is divided into four sections: (1) socio-demographic data, (2) forensic data, (3) experiences of prison and impact, and (4) previous medical history.
In, Section 1, socio-demographic data included questions on age, sex, educational status, employment status, income, religious affiliation, tribe, marital status, duration of marriage prior to imprisonment and number of children. Section 2 covered forensic data, including charge(s) against the participants, repeat offending (previous arrest and imprisonment, charges, frequency and reasons for repeat offending), time in prison and trial status (convicted or awaiting trial). For those convicted, we also asked about the length of sentence. For those awaiting trial, we asked about the plea, number of times in court, representation, self-assessment of the quality of representation and frequency of adjournments. Section 3 covered self-reported experience of the prison, in terms of quality of food, accommodation, clothing, general health condition, visitors, recreational facilities, educational rehabilitation, occupational rehabilitation, and freedom of worship. It also covered the impact of stay on family, occupation, relationships, the religious life of inmates and any history of mental illness. Section 4 covered prior medical and psychiatric history,
Patient Health Questionnaire 9
This is a short nine-item screening tool for symptoms of depression, which has been used in previous studies of non-specialist settings in Nigeria [26, 27]. Depression is indicated if five or more of the nine symptom criteria have been present at least “more than half the days” in the past two weeks, and one of the symptoms is depressed mood or anhedonia [28]. For the purposes of this study, those with scores ranging between zero and four were considered not to have depression.
Procedure
The selected inmates were approached by the trained research assistants to explain the study and obtain consent during period of recreation in the yard. It was explained that participation in the study was voluntary and non-participation will not affect the inmate in any way and that they are free to opt out of the study at any time they wished to. The study instruments were later administered to the selected inmates on a one-to-one basis in a private room by trained research assistants. The four research assistants were all conversant in both English and Tiv. Participants who could speak English were interviewed using the English version of the instruments, while others were interviewed using the Tiv version.
Analysis
The data generated were analyzed using the Statistical Package for the Social Sciences (SPSS) version 16 software. Frequencies and cross-tabulation of variables were generated to check for data entry errors and missing values. Descriptive statistics were calculated, including frequencies and percentages for categorial variables, and means with standard deviations for continuous variables.
Ethics
Approval for the study was obtained from the University of Ibadan/University College Hospital Ethics and Research Committee. Necessary permissions and clearances were also obtained from the Prison Command Authorities. Only those who provided consent to be interviewed were recruited. The prison inmates were informed that they were completely free to refuse participation, though most welcomed it as an opportunity to contribute to the improvement of health facilities in the prison. The participants were given toiletries and soft beverages to thank them for their time. However, these were judged to be modest enough so as to avoid undue influence to the decision to participate.