Further Evidence of Psychometric Performance of the Self-care of Diabetes Inventory in Adults With Type 1 and Type 2 Diabetes

De Maria M, Fabrizi D, Luciani M, Caruso R, Di Mauro S, Riegel B, Barbaranelli C, Ausili D. Further Evidence of Psychometric Performance of the Self-care of Diabetes Inventory in Adults With Type 1 and Type 2 Diabetes. Ann Behav Med. 2021 Sep 24:kaab088. doi: 10.1093/abm/kaab088. Epub ahead of print. PMID: 34559189.

Abstract

Background: The Self-care of Diabetes Inventory (SCODI) is a theory-based tool that measures self-care, a key strategy in the appropriate treatment of diabetes. However, despite the clinical differences between people with Type 1 Diabetes Mellitus (T1DM) and Type 2 Diabetes Mellitus (T2DM), the psychometric properties of the SCODI were only tested in mixed samples.

Purpose: This study aims to test the psychometric performances of the SCODI in two separate groups of adults with T1DM and T2DM.

Methods: This is a secondary analysis from two previous multicentre cross-sectional observational studies involving patients with T1DM (n = 181) and T2DM (n = 540). We tested dimensionality with confirmatory factor analysis and reliability with a multidimensional model-based coefficient for every scale of the SCODI: self-care maintenance, self-care monitoring, self-care management, and self-care self-efficacy.

Results: We found that the SCODI showed the same dimensionality, with minimal variation in factor loadings for each factor and each scale among T1DM and T2DM groups. High reliability for each scale in both groups was also found (self-care maintenance: T1DM = 0.86, T2DM = 0.83; self-care monitoring: T1DM = 0.84, T2DM = 1.00; self-care management: T1DM = 0.87, T2DM = 0.86; self-care self-efficacy: T1DM = 0.88; T2DM = 0.86).

Conclusion: The SCODI can be used for measuring self-care in people with T1DM, T2DM, or mixed groups using identical scoring procedures. Considering the well-known differences between Type 1 and Type 2 diabetes diseases and patients' characteristics, our results support the generalizability of the self-care theory on which the instrument is based.

De Maria M、Fabrizi D、Luciani M、Caruso R、Di Mauro S、Riegel B、Barbaranelli C、Ausili D. 《成人1型与2型糖尿病患者糖尿病自我护理量表（Self-care of Diabetes Inventory, SCODI）的心理测量学性能补充证据》，发表于《行为医学年鉴（Ann Behav Med）》，2021年9月24日，文章编号kaab088，DOI: 10.1093/abm/kaab088，提前在线出版，PMID: 34559189。

【摘要】
背景：糖尿病自我护理量表（Self-care of Diabetes Inventory, SCODI）是一款基于理论的评估工具，用于测评自我护理行为——这是糖尿病规范治疗的核心策略。尽管1型糖尿病（Type 1 Diabetes Mellitus, T1DM）与2型糖尿病（Type 2 Diabetes Mellitus, T2DM）患者存在显著临床差异，但此前仅在混合样本中对SCODI的心理测量学属性开展过检验。

研究目的：本研究旨在分别在1型糖尿病与2型糖尿病成人患者两个独立队列中，验证SCODI的心理测量学性能。

研究方法：本研究为二次分析，数据来源于两项既往多中心横断面观察性研究，分别纳入1型糖尿病患者181例、2型糖尿病患者540例。我们针对SCODI的四个维度——自我护理维持、自我护理监测、自我护理管理以及自我护理自我效能，分别通过验证性因子分析检验其结构效度，并基于多维度模型系数评估各维度的信度。

研究结果：结果显示，SCODI在1型与2型糖尿病组中具备一致的结构效度，各因子及维度的因子载荷差异极小。同时两组各维度均表现出良好的信度（自我护理维持：T1DM组0.86，T2DM组0.83；自我护理监测：T1DM组0.84，T2DM组1.00；自我护理管理：T1DM组0.87，T2DM组0.86；自我护理自我效能：T1DM组0.88，T2DM组0.86）。

研究结论：SCODI可采用统一的计分流程，用于测评1型糖尿病、2型糖尿病患者或混合样本的自我护理水平。鉴于1型与2型糖尿病及其患者特征间存在公认的差异，本研究结果支持该量表所依托的自我护理理论具备普适性。