The PCI in our study included three important components: (1) psychological crisis intervention; (2) case management with active and assertive follow-up; and (3) psychiatric consultations. Some specific psychological interventions can reduce the rate of suicide attempts (
16,
17). Psychological crisis intervention has become the most widely used time-limited treatment modality (
18), and problem-solving, an important component of crisis intervention, could decrease suicide attempts (
19,
20).
Case management services have recently been studied for patients with suicide risks. Kim et al. in Korea evaluated the long and short-term effects of case management on suicide prevention; in this study, case managers provided weekly interviews in a four-week case management service. In the long term, they found no difference in the time to suicide re-attempt between the control group and individuals receiving case management service (
21). However, unlike our study, the case manager was a social worker, and the service did not include any psychological crisis intervention or psychiatric consultation.
Other programs incorporate some crisis resolution interventions, follow-ups, and case management services. Crisis resolution and treatment groups in the home have been introduced in England. They aim to evaluate all patients considered for acute hospitalization (including those with suicide risk) to offer intensive home treatment rather than hospital admission if possible. The main features included 24-hour accessibility, intensive contact, and case management in the community, with visits twice daily if needed (
22). Internationally, the most extensive implementation of crisis resolution home treatment teams (CRT) has been in the UK. These teams provide a hospital-at-home service for acute episodes of mental disorders. Furthermore, most CRT teams also provide gate-keeping functions for admissions into psychiatric services and facilitate early discharge into the community (
23).
In Australia, the northern crisis assessment and treatment team (NCATT) provides multidisciplinary 24-hour community assessment and treatment of psychiatry emergencies. The patients can ring at any time. For admission, all agencies (except NAMHS rehabilitation services) must first refer to NCATT. In this service, if the patient is planning to receive outpatient care, he/she can be visited up to twice daily (
24). Also, a study in Australia comparing the efficacy of intensive case management with usual treatment for suicide attempters following discharge from psychiatric care revealed that this service could reduce the risk of suicide re-attempt. Like our study, in this service, there was a high dropout rate (
25).
In Japan, through the ACTION-J study, the effectiveness of an assertive case management service has been evaluated to prevent suicide re-attempts. In this approach, the case manager facilitates the care of the patient after an attempt by periodic contact, collection of information about the patient's status, psychological education, collaboration with psychiatrists and primary care physicians, referrals for outpatient treatment, coordination of the use of social resources, and usage of internet-based services (
26,
27). This study showed that case management services following emergency admission for a suicide attempt could reduce the rate of repeat self-harm (
13). In this study, contrary to our service, patients had been visited on a fixed schedule. In our PCI service, the frequency of contact was variable (at least one visit weekly) based on the patient's condition and the clinician's clinical judgment.
Morthorst et al. applied an alternative case management model for suicide attempters. The intervention was provided as case management with crisis intervention, problem-solving, motivational support, and actively assisting patients to and from scheduled appointments. The trial found no significant difference between the group receiving the intervention and the group receiving treatment as usual in suicide repetition rates (
28).
Chen et al. in Taiwan evaluated the effectiveness of case management in preventing suicide re-attempts. In their study, a case manager, mainly a psychiatric nurse, coordinated the services. Their study showed that case management service appears to be effective in preventing suicide repetition (
12). In this service, case management is principally done via telephone conversations and home visits as a secondary option.
The Brimblecombe et al. study that evaluated home treatment as an alternative to hospitalization found that 21% were admitted to the hospital before home treatment was finished. Notably, 'risk to self' was the most common reason for hospitalization (
29). Alba Pale et al. in Barcelona designed home treatment and crisis intervention as an alternative approach to hospitalization. They found home treatment was an alternative to hospital admission (
30). As seen in these studies, home care could be an important part of the case management service, but it was impossible in our study because of a lack of resources.
In Iran, Malakouti et al. established a charge-free "Suicide Prevention Consultation Office" (SPCO) for persons with suicide attempts, patients with depressive disorders, and any individuals at risk of suicide. The main task was to make immediate contact with suicide attempters at Emergency Department and provide five consultation sessions and educational brochures to the patients and their families. The intervention phase included the treatment process in primary health care and education for general practitioners; these interventions were done for one year and showed some reductions in suicide risk (
31). Furthermore, active telephone follow-up and case management can markedly reduce the risk of suicide re-attempt (
9,
32,
33). In our model, a close follow-up that occurs through both psychiatry visits and telephone contacts can be associated with increased patient adherence to PCI and perhaps reduced suicide thoughts and attempts.
As noted above, our discharge criteria included a lowered risk for suicide in two consecutive visits. Resolving the risk of suicide in our study implies that patients had low suicide risk in two consecutive visits, based on clinical interview and risk assessment according to a physician's clinical judgment. After discharge from our service, patients were referred to the conventional outpatient service for continuity of care.
We have realized that a significant proportion of patients who were considered dropped-out experienced resolved suicidal risk, but since they did not attend two consecutive sessions, we included them as dropped-out subjects.
There are barriers to the implementation and sustainability of novel programs, especially in low-resource settings, which may include, among many others, inadequate financial resources to cover the expenses and wages of the service providers, the challenges of the integration of a new program into the existing services, and the attitudes of the other hospital's staff and patients/families.
The study's major limitations included the lack of a control group and the short follow-up period. Also, satisfaction was assessed in a convenience sample of reachable persons, which could not represent all participants. Moreover, it would be much better to assess patients' satisfaction with more reliable methods and obtain the opinion of different stakeholders. Another limitation was difficulties working with suicidal patients, influencing the decision-making process and limiting the researchers' ability to control the setting or define or measure the outcomes.
5.1. Conclusions
Taken together, we can argue that the suicide risk and the need for hospitalization were resolved for many patients who otherwise needed hospital care. A randomized controlled trial is mandated to ascertain the efficacy of this service compared with the existing services.
In the future, we would revise our service based on the findings of the current pilot study and conduct more studies employing a controlled design, such as a formal implementation-effectiveness study, to assess the outcomes and effectiveness of the PCI. If effective, we can think of expanding the coverage of the PCI to include pediatric patients, self-mutilation with no or low risk for suicide, traumatic crises such as physical and sexual abuse, and domestic violence. It is important to draft guidelines to define appropriate candidates for PCI and describe the most appropriate interventions.