[In-patients suicide: epidemiology and prevention]

Few studies have been devoted to in-patients' suicides. This covers all suicides that occurred during hospitalisation, whatever the place (inside or outside the institution) and often, for psychiatric in-patients, suicides carried out within 24 hours after leaving the institution.

However, the incidence of suicide in hospital is high, higher than that observed in the general population. It is 250 per 100,000 admissions in psychiatric hospitals and 1.8 per 100,000 admissions in general hospitals, which is four to five times more than in general population. Five to 6.5% of suicides are committed in the hospital: 3 to 5.5% occur in psychiatric hospitals and about 2% in general hospitals. Many risk factors for suicide were identified in this context. The accessibility to one or more means of suicide (water, rail, high floor [third floor or beyond], knives, possibility of hanging...) is a recognized factor in psychiatric institutions. In the psychiatric environment, hospitalisation period also determines the risk of suicide: it is highest during the 1st week of hospitalisation and within 2 weeks after leaving. The same is true for the conditions of care: inadequate supervision, the underestimation of the risk of suicide by teams, poor communication within the teams and the lack of intensive care unit promote suicide risk. The controlled studies conducted in a psychiatric environment distinguish two periods for identifying risk factors. The first period is the time of hospitalisation. Are recognized as risk factors: the existence of suicidal personal history (but also family) and attempted suicide shortly before admission, the diagnosis of schizophrenia or mood disorder (non-controlled studies also emphasize the importance of alcoholic comorbidity), being hospitalised without consent, living alone, absence from the service without permission. The second period covers the time-period immediately following the hospitalisation. For this period, risk factors are: the existence of personal history of suicide and suicidal ideation or attempt of suicide shortly before admission (but also attempt of suicide during hospitalisation), the existence of relational difficulties, the existence of stress or loss of employment, living alone, a decision on leaving the hospital unplanned and lack of contact with nursing in the immediate postdischarge period. In general hospitals, the chronicity and severity of the somatic disease, the personality of the patient and the existence of a psychiatric comorbidity are the suicidal factors most often quoted. Furthermore, we also found only a low rate of psychiatric consultation during the hospitalisation of patient who will commit suicide. Among the countries which have a national program of suicide prevention, only England registered the question of the in-patients suicide among its priorities. The elements of a prevention policy appear however in certain scientific publications and some programs of local or regional initiative. These elements can be grouped under five items: securing the hospital environment, optimisation of the care of the patients at suicidal risk, training of the medical teams in the detection of the risk and in the care of the suicidal subjects, involvement of the families in the care and implementation of post-event procedures following a completed suicide or an attempt.