Assessment of biopsychosocial complexity and health care needs: Measurement properties of the INTERMED self-assessment version

Arianne K.B. Van Reedt Dortland*, Lilian L. Peters, Annette D. Boenink, Jan H. Smit, Joris P.J. Slaets, Adriaan W. Hoogendoorn, Andreas Joos, Corine H.M. Latour, Friedrich Stiefel, Cyrille Burrus, Marie Guitteny-Collas, Silvia Ferrari

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

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 IMSAwithin 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 a; 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 a = 0.80) were satisfactory. Intraclass correlation coefficient between IMSA and IM total scores was.78 (95% CI =.75-.81). Correlations of the IMSAwith 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.

Original languageEnglish
Pages (from-to)485-492
Number of pages8
JournalPsychosomatic Medicine
Volume79
Issue number4
DOIs
Publication statusPublished - 2017

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