Core services of intensive case management for people with mental illness: A network analysis.

Background: In intensive case management (ICM), users receive a wide variety of services of varying content, which makes it difficult to understand the global features of ICM programs.
Aims: The aim of this study was to examine the features of ICM programs using network analysis.
Methods: A total of 233 ICM users in two Japanese medical institutions were recruited to participate. All received services were recorded for 2 months. In the network analysis, nodes represented types of ICM services and edges between two nodes depicted when over 5% of participants received both types of services.
Results: We found high centrality values for 'H5. Hospital-based counseling', 'O13. Outreach support for mental health medications', 'H13. Hospital-based support for mental health medication', 'T5. Counseling via telecommunication', 'H3. Hospital-based coordination of services in the medical institution' and 'T2. Coordination of services with other institutions via telecommunication'. These results indicated that these services were associated with various other types of services. Social functioning was related to 'O13. Outreach support for mental health medication', whereas need for ICM was related to 'H13. Hospital-based support for mental health medications', 'T5. Counseling via telecommunication' and 'T2. Coordination of services with other institutions via telecommunication'.
Conclusion: Based on these findings, we speculated that there are at least five types of core services in ICM: regular face-to-face contact, outreach services, hospital-based services, easy contacts and coordination. These findings clarified the features of ICM programs, which may help improve the understanding of case managers' practice.