ELDERLY SATISFACTION TOWARDS THE INTEGRATED HEALTH POST (ES-IHP) QUESTIONNAIRES: VALIDATION USING RASCH MODELING
Integrated Health Post for the elderly (Posbindu) has been carried out to improve the health status of the elderly, but Posbindu’s utilization is still unsatisfactory. Satisfaction of the elderly towards the health care provided at the Posbindu contributed to their adherence. So far there is no instrument to measure the level of elderly satisfaction. The objectives of the study were to develop and assess the validity and reliability of the elderly satisfaction towards the integrated health post questionnaire using Rasch modeling. A cross-sectional study was carried out on 202 elderly from 16 Posbindu in Bandung, Indonesia. This study was performed from August to December 2019. The questionnaire was developed from a qualitative study, consisted of 36 items that covered the satisfaction concepts of structure, process, and output. Nine analytic tests were carried out, namely, the person fit order, person reliability, Cronbach's alpha, item reliability, item fit order, separation, the Wright map analysis, rating scale, and the differential item functioning as implemented by the Winstep version 3.73 software. Overall, the questionnaire demonstrated promising results. The overall value of person reliability was 0.93 with Cronbach's alpha of 0.96 and the value of item reliability was 0.94. However, 3 items were misfits and should be considered to be revised or removed. Further studies involving various regions in Indonesia should be carried out before this questionnaire is used in Indonesia
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