854 © The Author(s) 2020. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com. Research Methods Measuring family caregivers’ experience of interprofessional care for patients and families: development of the Japanese version of the Caregivers’ Experience Instrument Gen Nakayama a, , Shoichi Masumoto b, *, Junji Haruta c,d, and Tetsuhiro Maeno c a Department of Primary Care and Medical Education, Graduate School of Comprehensive Human Sciences, b Department of Family Medicine, General Practice and Community Health, Faculty of Medicine and c Department of Primary Care and Medical Education, Faculty of Medicine, University of Tsukuba, Tsukuba, Japan and d Medical Education Center, School of Medicine, Keio University, Tokyo, Japan *Correspondence to Shoichi Masumoto, Department of Family Medicine, General Practice and Community Health, Faculty of Medicine, University of Tsukuba, 1-1-1 Tenno-dai, Tsukuba, Ibaraki 305-8575, Japan; E-mail: smash422@md.tsukuba.ac.jp Abstract Background: Improving individuals’ experience of care is now a critical goal of health care systems. Although a number of instruments have been developed to measure experience of care, few instruments measure family caregivers’ experience of interprofessional care for patients and families. Objective: To develop the Japanese version of the Caregivers’ Experience Instrument (J-IEXPAC CAREGIVERS) and to investigate its validity in assessing quality of integrated care for both patients with chronic conditions and their family caregivers, from the caregivers’ perspective, in Japan. Methods: We used a cross-sectional questionnaire survey to test the validity and internal consistency of J-IEXPAC CAREGIVERS. Four hundred family caregivers were recruited in three municipalities. We evaluated the feasibility, structural validity, internal consistency and hypothesis testing for construct validity of the scale. Results: A total of 274 (68.5%) questionnaires were analysed. Confrmatory factor analysis showed acceptable model ft for the hypothesized two-factor model according to ft indices, as identifed for the original version: attention for the patient and attention for the caregiver. Cronbach’s alpha for score in J-IEXPAC CAREGIVERS with 12 items was high (0.92). Spearman’s rank correlation coeffcient between overall caregiver satisfaction and J-IEXPAC CAREGIVERS score was 0.71. Family caregivers who experienced home-visit services had signifcantly (P = 0.001) higher total scores than those who did not. Conclusions: This pilot study showed that the J-IEXPAC CAREGIVERS is valid and reliable. This scale can be useful for evaluating quality of integrated care, with focus on family caregivers and patients with chronic conditions in Japan. Key words: Caregivers, chronic disease, health care quality assurance, health services evaluation, integrated care, people-centred care Family Practice, 2020, Vol. 37, No. 6, 854–861 doi:10.1093/fampra/cmaa059 Advance Access publication 26 June 2020 Downloaded from https://academic.oup.com/fampra/article/37/6/854/5863180 by guest on 01 March 2022