The prisoners are under the responsibility of the authority that decided their detention and their health are a worldwide real problem and a public health priority (Ünal et al., 2016; Lines, 2008). The death rates among prisoners are often reported to be higher than among civilians (Wobeser et al., 2002; Salive et al., 1990; Dalton, 1999). We did not find any statistics or publications on deaths in the penitentiary environment in Tunisia.
The relatively low number of deaths in our series, only 26 cases can largely be explained by the common practice of sentence suspension for medical reasons for the terminally-ill prisoners according to their disease evolution. This also partly explains the young age of our population. All the victims of our series were males. The detainee environment is known to be predominantly male and the great predominance of males in death series in penitentiary environments is often reported in literature (Gherman & Chiroban, 2015; Ünal et al., 2016; Wobeser et al., 2002). Most victims had a low socio-economic level (17 cas). This is the context of poverty which is conducive to crime committing and which often explains the detention and conviction (Yapo Etté et al., 2012; Okoye et al., 1999; Faget, 2013).
Regarding the cause of death, the majority of deaths (18/26) were of natural causes. It is related to the conditions of detention in Tunisian prisons. An April 2014 report, Prisons in Tunisia: International Standards versus Reality, by the UN Office of the High Commissioner for Human Rights, cited overcrowding, along with poor infrastructure, as the biggest problems in prisons (Kim et al., 2007). Worldwide, the literature shows a wide variety of causes of death of detainees often with a predominance of natural causes. Thus, and as in our series, in penitentiary facilities in Atlanta, Georgia, between 1974 and 1985, the majority of deaths among prisoners were due to natural causes (“Prisons in Tunisia: International Standards versus Reality”, UN Human Rights Watch report, 2014), and Saliva et al. also reported that over 68% of all deaths in the prison system of Maryland on an 11-year study period were due to diseases (Alive et al., 1989). Studies in India between 2001 and 2010 in Turkey between 2010 and 2012 also revealed that the vast majority of deaths in custody were of natural causes with 90% (Frost & Hanzlick, 1988) and 83.2% (Ünal et al., 2016). In contrast, in Canada, a study in Ontario between 1990 and 1999 showed that more than half of the deaths in custody were of violent causes (Wobeser et al., 2002).
The most common cause of natural deaths in our series was due to cancers (33.3%) followed by infections (27.8%). This correlated with the literature data. Indeed, cancer has accounted for 23.07% of natural causes after cardiovascular causes with 42.3% in a recent Turkish study (Ünal et al., 2016). Similarly in the US between 2000 and 2013, in American prisons, they found that 79.6% of deaths were secondary to natural causes, and among them 30.5% were of cardiac cause and 26.3% of tumor origin (Bardale & Dixit, 2015). Cardiovascular causes accounted for only 16.7% of natural causes in our series with two cases of myocardial infarction and pulmonary embolism. The young age of our population partly explains this low proportion compared to foreign series.
In our study there were three suicides 11.5%. In the international literature, the suicide rates among prisoners vary. Thus, a survey of all American prisons indicated that suicide is the second cause of death of prisoners, after the natural cause of death, with 12.09% (Bardale & Dixit, 2015). In contrast, in Canada, 31.16% of prisoners’ cause of deaths in Ontario between 1990 and 1999 were suicide (Wobeser et al., 2002). The mean age of suicide victims in the study were 25 years old. In the prisons of New York, 21% of deaths by suicide among prisoners concerned those aged between 25 and 29 years, and 26% were between 30 and 34 (Margaret, 2015). Also in the Finnish and Australian studies, suicide was more common in younger prisoners (Marcus & Alcabes, 1993; Joukamaa, 1997). Saliva et al. (Alive et al., 1989) reported that the relative risk of suicide among prisoners aged between 25 and 34 years was significantly higher than in any other age group.
Hanging was the means exclusively used by the prisoners of our study who committed suicide. This finding correlated with the literature data reporting that hanging is a frequent means of suicide in prisons (Wobeser et al., 2002; Yapo Etté et al., 2012; Okoye et al., 1999). The feasibility of including hanging in a closed environment may explain this finding.
The place of detention can influence suicidal detainees. In our series, the 3 suicides which occurred in prison was committed by three individuals who had already been condemned and purged their sentences. An Indian study on suicides in detention, found that more than 71% of suicides occurred in police stations and 36% of suicides occurred within 24 h following the arrest (Wobeser et al., 2002). The custody period may also influence the detainees’ passage to suicidal act. In the literature, the findings vary, the studies have shown that the mortality rate increases proportionately with the duration of the detention and other studies concluded to the contrary (Alive et al., 1989; Coffey et al., 2003; Topp, 1979).
Other than suicide, the causes of violent deaths in our study were homicides by firearms and accidents. We collected three homicide cases (11.5%). In American prisons homicides, including accidental homicide due to the use of violence by the guards, accounted for 1.9% of causes of death of prisoners between 2000 and 2013. All homicide cases in our study were involuntary, occurring as a result of gunshot wounds in the aftermath of riots and escape attempts during the revolution of 2011. No case of murder was found. Only two cases of accidental death were found. In the literature after the suicide by hanging, death by substance abuse, which includes cases of poisoning and overdose among consumers of hard drugs and homicides are the main cause of violent deaths among prisoners (Gherman & Chiroban, 2015; Wobeser et al., 2002; Smialek & Spitz, 1978).
