Validation and psychometric properties of the self-efficacy for Appropriate Medication Use Scale in elderly Chinese pati
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RESEARCH ARTICLE
Validation and psychometric properties of the self-efficacy for Appropriate Medication Use Scale in elderly Chinese patients Jianbo Wu1 · Zhujun Tao1 · Zhongjuan Song1 · Yunxuan Zhang1 · Hua Sun2 · Jiaofeng Wang3 · Jie Shen1 Received: 4 September 2019 / Accepted: 26 September 2020 © Springer Nature Switzerland AG 2020
Abstract Background Self-efficacy for appropriate medication use is an important construct when evaluating the optimal use of medications. However, no instrument that assesses this construct in elderly Chinese patients has been shown to have valid psychometric properties.Objective To investigate the psychometric properties of the Chinese version of the self-efficacy for Appropriate Medication Use Scale in elderly patients with type 2 diabetes. Setting Geriatric patients were recruited from the endocrinology department of a tertiary hospital in Shanghai, China. Method Self-efficacy was assessed by the Chinese version of the Self-Efficacy for Appropriate Medication Use Scale in subjects who were at least 65 years old. Exploratory and confirmatory factor analyses were used to develop a psychometrically sound model of the scale. Main outcome measures Internal and test-retest reliability; convergent and discriminant validity of the scale; model fit indices of the factor model.Results The two-factor model of the self-efficacy for Appropriate Medication Use Scale was not suitable for elderly patients with respect to both item factor loadings and model fit indices. Conceptually overlapping scale items emerged when the scale was used in these patients. The final model developed appeared to achieve an ideal model fit and presented acceptable convergent and discriminant validity.Conclusions This study presented a Chinese version of the self-efficacy for Appropriate Medication Use Scale with psychometrically sound properties that will enable pharmacists, nurses and physicians to prospectively evaluate the impact of medication self-efficacy on a variety of health outcomes in elderly patients with type 2 diabetes. Keywords Appropriate medication use · China · Elderly · Psychometric properties · SEAMS · Self-efficacy · Type 2 diabetes mellitus
Impacts on practice • The Chinese edition of the self-efficacy for Appropriate
Medication Use Scale can be used as a tool in Chinese patients, but it has only been confirmed among patients
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11096-020-01167-1) contains supplementary material, which is available to authorized users. * Jie Shen [email protected] 1
Department of Pharmacy, Huadong Hospital, Fudan University, 221 West Yan’an Road, Shanghai 200040, China
2
Department of Endocrinology, Huadong Hospital, Fudan University, Shanghai, China
3
Department of Geriatrics, Huadong Hospital, Fudan University, Shanghai, China
with stroke so far and may not be suitable for use among elderly patients. • Conceptually overlapping items may occur in elderly patients when they answer scale items; these
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