Assessment of Biopsychosocial Complexity and Health Care Needs: Measurement Properties of the INTERMED Self-Assessment Version.

OBJECTIVE: The INTERMED Self-Assessment questionnaire (IMSA) was developed as an alternative to the observer-rated INTERMED (IM) to assess biopsychosocial complexity and health care needs. We studied feasibility, reliability, and validity of the IMSA within a large and heterogeneous international sample of adult hospital inpatients and outpatients as well as its predictive value for health care use (HCU) and quality of life (QoL). METHODS: A total of 850 participants aged 17 to 90 years from five countries completed the IMSA and were evaluated with the IM. The following measurement properties were determined: feasibility by percentages of missing values; reliability by Cronbach α; interrater agreement by intraclass correlation coefficients; convergent validity of IMSA scores with mental health (Short Form 36 emotional well-being subscale and Hospital Anxiety and Depression Scale), medical health (Cumulative Illness Rating Scale) and QoL (Euroqol-5D) by Spearman rank correlations; and predictive validity of IMSA scores with HCU and QoL by (generalized) linear mixed models. RESULTS: Feasibility, face validity, and reliability (Cronbach α = 0.80) were satisfactory. Intraclass correlation coefficient between IMSA and IM total scores was .78 (95% CI = .75-.81). Correlations of the IMSA with the Short Form 36, Hospital Anxiety and Depression Scale, Cumulative Illness Rating Scale, and Euroqol-5D (convergent validity) were -.65, .15, .28, and -.59, respectively. The IMSA significantly predicted QoL and also HCU (emergency department visits, hospitalization, outpatient visits, and diagnostic examinations) after 3- and 6-month follow-up. Results were comparable between hospital sites, inpatients and outpatients, as well as age groups. CONCLUSIONS: The IMSA is a generic and time-efficient method to assess biopsychosocial complexity and to provide guidance for multidisciplinary care trajectories in adult patients, with good reliability and validity across different cultures.

[Evaluation of the German Version of the "INTERMED-Self-Assessment"-Questionnaire (IM-SA) to Assess Case Complexity]. / Evaluation der deutschsprachigen Version des "INTERMED-Self-Assessment"- Fragebogens (IM-SA) zur Erfassung von Patienten mit komplexem Versorgungsbedarf.

INTRODUCTION: The INTERMED- interview (IM-CAG=INTERMED complexity assessment grid) is a well validated instrument for the identification of complex patients in need of integrated health care (score ≥21). The IM-SA (INTERMED self-assessment)-questionnaire, derived from the INTERMED- interview, was developed in cooperation with the international INTERMED group in order to facilitate its use in various clinical settings and to foster the patients' perspective on health-care needs. METHODS: The German version of the IM-SA was evaluated in a clinical sample (n=136) of psychosomatic outpatients and compared to the IM-CAG. Construct validity was examined by analyzing the correlations of the IM-SA with quality-of-life (SF-36) and anxiety/depression (HADS). Sensitivity and specificity for the identification of complex patients were examined by using ROC (Receiver Operating Characteristic) analysis. RESULTS: The correlations between the total score and the subscales of the IM-SA, compared to the INTERMED, were high (total score r=0.79 (95%-KI: [0.70; 0.85]). Cronbach's α was 0.77, and construct validity was high (SF-36 mental component score: r=-0.57; HADS Depression: r=0.59). The IM-SA total score was significantly lower compared to IM-CAG, mainly because of low IM-SA scores in the somatic domain. According to ROC analysis, the IM-SA-cut-off for identifying complex patients has to be lowered (score ≥17). DISCUSSION: The IM-SA can be used as an instrument to identify complex patients in need of integrated bio-psycho-social care. CONCLUSION: The IM-SA is a reliable instrument to be used in various clinical settings to identify complex patients and to provide integrated, bio-psycho-social care.