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Please use this identifier to cite or link to this item: http://hdl.handle.net/10564/3583

Title: Development of a self-efficacy questionnaire, 'Insulin Therapy Self-efficacy Scale (ITSS)', for insulin users in Japanese: The Self-Efficacy-Q study.
Other Titles: インスリン使用患者における新規Self-efficacy質問紙(ITSS)の開発に関する臨床研究
Authors: Nakaue, Junko
Koizumi, Miyuki
Nakajima, Hiroki
Okada, Sadanori
Mohri, Takako
Akai, Yasuhiro
Furuya, Miyuki
Hayashino, Yasuaki
Sato, Yasunori
Ishii, Hitoshi
Keywords: Insulin therapy
Insulin Therapy Self-efficacy Scale (ITSS)
Issue Date: Mar-2019
Publisher: John Wiley & Sons Australia, Ltd
Citation: Journal of diabetes investigation Vol.10 No.2 p.358-366 (2019 Mar)
Abstract: AIMS/INTRODUCTION: Although patient self-efficacy is known to affect adherence to therapy, no available tool measures self-efficacy of insulin therapy administration while addressing the entire therapeutic process and management. In light of this, we developed the 'Insulin Therapy Self-efficacy Scale (ITSS)'. MATERIALS AND METHODS: Development of the ITSS involved three phases: (i) item generation and creation of a questionnaire draft; (ii) testing and correcting the items through interviews with patients; and (iii) a multicenter, single-arm study to validate the questionnaire. RESULTS: A factor analysis and Cronbach's α both confirmed good internal consistency in the patients' confidence regarding the following four factors: the insulin injection procedure, insulin titration, glycemic control and ability to cope with hypoglycemia. Reproducibility was confirmed using weighted κ statistics and intraclass correlations. Good concurrent validity was confirmed with two other questionnaires. The ITSS score was also found to correlate with several patient characteristics and clinical parameters, as well as with a better adherence to injected insulin therapy 6 months later, suggesting the predictive validity of this scale. CONCLUSIONS: The ITSS is a reliable and valid tool for assessing and quantifying patients' self-efficacy. The ITSS estimation of self-efficacy can predict a patient's glycemic control and future adherence to insulin therapy. These characteristics will ensure the usefulness of the ITSS in ensuring a successful therapeutic process for patients and physicians.
Description: 博士(医学)・甲第711号・平成31年6月26日
© 2018 The Authors. Journal of Diabetes Investigation published by Asian Association for the Study of Diabetes (AASD) and John Wiley & Sons Australia, Ltd.
This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License (https://creativecommons.org/licenses/by-nc-nd/4.0/), which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
URI: http://hdl.handle.net/10564/3583
ISSN: 20401116
Academic Degrees and number: 24601A711
Degree-granting date: 2019-06-26
Degree name: 博士(医学)
Degree-granting institutions: 奈良県立医科大学
Appears in Collections:2019年度

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