Is intensive case management screening sheet score associated with service intensity?

Aims Since April 2020, the new Japanese mental health system has used the Intensive Case Management Screening Sheet (ICMSS) to identify patients’ needs for case management services. This study aimed to examine the association between ICMSS score and service intensity and compare the magnitude of association between ICMSS score and service intensity with other scales. Methods We recruited patients who received case management services from a staff member in a psychiatric outpatient service, psychiatric day‐care program, or outreach team based at one psychiatric hospital. Case management service needs and functioning were assessed using ICMSS, Global Assessment Functioning (GAF), and Personal and Social Performance (PSP). The case manager also documented all services received by the participant for 2 months. The association between each scale and service duration was examined. Furthermore, the magnitude of the association between each scale and service intensity was compared. Results Overall, 138 participants were included in the analysis. The most common diagnosis was schizophrenia. Mean total service duration was weakly but significantly correlated with ICMSS (Spearman's ρ = 0.320), GAF (ρ = −0.198), and PSP (ρ = −0.275) scores. Poisson's regression models and postestimation testing showed that the coefficient for ICMSS score (B = 0.144; 95% CI = 0.141, 0.148) was significantly larger than the coefficients for GAF (B = −0.017, 95% CI = −0.017, −0.016, χ2 = 15.70, P
The type and level of case management services should be determined based not only on the Intensive Case Management Screening Sheet (ICMSS) score but also on the needs of each patient and shared decision‐making between the patient and case manager.