Background: Gestational diabetes mellitus (GDM) is a condition with significant prenatal and postnatal implications. This study aimed to validate the Summary of Diabetes Self-Care Activities (SDSCA) measure in Iranian women with GDM, focusing on its psychometric properties.

Methods: The Persian version of the SDSCA was evaluated in 180 Iranian women with GDM. Following COSMIN guidelines, the instrument was translated into Persian, and its psychometric properties were assessed, including content validity, face validity, construct validity, internal consistency, test-retest reliability, measurement error, responsiveness, and interpretability. Floor and ceiling effects were also examined.

Results: The validity assessments showed strong content validity, with a Content Validity Index (CVI) of 0.93 and a Content Validity Ratio (CVR) of 0.97. Face validity yielded an impact score of 4.38. Exploratory factor analysis (EFA) identified three factors-diet, exercise, and blood sugar testing-accounting for 57.4% of the variance. Confirmatory factor analysis (CFA) confirmed the model's excellent fit (CFI = 1.00, TLI = 0.99, NFI = 0.98, RFI = 0.96). The reliability analysis showed a Cronbach's alpha of 0.78 and a McDonald's omega of 0.91, with an intraclass correlation coefficient (ICC) of 0.92 (95% CI: 0.83-0.96). Ceiling effects were observed for blood sugar testing (26.7%), while floor effects were noted for exercise (6.7%) and blood sugar testing (6.1%). The Minimal Important Change (MIC) of 2.68 units exceeded the Smallest Detectable Change (SDC) of 1.11 units, indicating the tool's ability to detect clinically meaningful changes.

Conclusions: The Persian version of the SDSCA demonstrates strong psychometric properties, including both reliability and validity, making it a suitable tool for assessing self-care behaviors in Iranian women with GDM. Its use in future research can enhance understanding of self-management in this population.

Keywords: Cross-Sectional studies; Diabetes; Gestational; Iran; Pregnancy; Psychometrics; Self care.

© 2025. The Author(s).

背景: 妊娠糖尿病（GDM）是一种具有重要产前和产后影响的状况。本研究旨在验证总结糖尿病自我管理行为量表（SDSCA）在伊朗患有GDM女性中的效度，重点在于其心理测量学属性。

方法: 对180名患有GDM的伊朗妇女进行了SDSCA波斯语版本的评估。按照COSMIN指南，该量表被翻译成波斯语，并对其心理测量学特性进行了评价，包括内容效度、表面效度、构建效度、内部一致性、测试-重测信度、测量误差、反应性和可解释性等。还检查了低分和高分效应。

结果: 有效性评估显示了很强的内容效度，内容效度指数（CVI）为0.93，内容效度比值（CVR）为0.97。表面效度得分为4.38。探索性因素分析（EFA）确定了三个因子——饮食、运动和血糖检测，这些因子解释了57.4%的方差。验证性因素分析（CFA）证实模型具有极佳拟合度（CFI = 1.00, TLI = 0.99, NFI = 0.98, RFI = 0.96）。可靠性分析显示克朗巴哈α系数为0.78，麦克唐纳奥米伽指数为0.91，组内相关系数（ICC）为0.92 (95% CI: 0.83-0.96)。血糖检测存在高分效应（26.7%），而运动和血糖检测有低分效应（分别为6.7% 和6.1%）。最小重要变化值（MIC）为2.68单位，超过了最小可检测变化值（SDC）的1.11单位，表明该工具能够检测到临床上有意义的变化。

结论: 波斯语版本的SDSCA显示了强心理测量学特性，包括可靠性和有效性，在评估伊朗GDM女性自我管理行为方面是一个合适的工具。在未来的研究中使用它可以增强对此人群自我管理的理解。

关键词: 横断面研究；糖尿病；妊娠糖尿病；伊朗；怀孕；心理测量法；自我护理。