2型糖尿病患者饮食行为依从性影响因素量表的编制及信效度检验

Development of Influence Factors of Dietary Behavior Compliance Scale for Patients with Type 2 Diabetes Mellitus and Its Reliability and Validity

目的开发"2型糖尿病患者饮食行为依从性影响因素量表",并检验其信效度。方法根据文献回顾法,参考《健康心理学》,依据计划行为理论编制量表初期条目池。通过2轮评议以及10例患者的小范围预测试评定量表的内容效度,形成初始版2型糖尿病患者饮食行为依从性影响因素量表。预试验和大样本测试均通过便利抽样的方法选取哈尔滨市3所三级甲等医院、2所社区卫生服务中心的280例和336例符合标准的患者进行测试。并采用探索性因子分析、验证性因子分析及相关系数法检验量表的信效度。结果探索性因子分析共提取4个公因子,KMO为0.824,总体方差的累计贡献率为67.777%;量表的Cronbachα系数为0.885,各维度Cronbachα系数在0.718~0.924,维度间相关系数在0.104~0.510,维度与总量表的相关系数在0.573~0.793,间隔2周后的重测信度为0.915;验证性因子分析结果显示近似误差均方根为0.060,比较拟合指数为0.967,提示模型的拟合程度好。最终形成包括4个维度、17个条目的正式版量表。结论本研究开发的"2型糖尿病患者饮食行为依从性影响因素量表"具有良好的信效度,可用于评估工具应用于临床实践中。

Objective To develop a Influence Factors of Dietary Behavior Compliance Scale for Patients with Type 2 Diabetes Mellitus （T2DM-CFIDBS） and test its reliability and validity. Methods After literature review, initial item pool of the scale was identified based on theory of planned behavior and Health Psychology. After 2 rounds of discussion and a small-scale testing of the content validity of the scale, the initial version of the scale was formed. Pilot trial and large-sample test were conducted among 280 and 336 patients respectively. The reliability and validity of the scale were tested with exploratory factor analysis, confirmatory factor analysis and correlation coefficient method. Results Four common factors were exacted by exploratory factor analysis and KMO value was 0.824. Accumulative contribution rate of overall variance was 67.777%; Cronbach Alpha coefficient of the scale 0.885 and that of each dimension ranged from 0.718 to 0.924. Correlation coefficient of dimensions ranged from 0.104 to 0.510 and that of dimensions and total scale from 0.573 to 0.793. Test-retest reliability was 0.915 and confirmatory factor analysis showed that root mean square error approximation of 0.060 and comparative fit index of 0.967 indicated good fitting degree. The final version of the scale included 4 dimensions with 17 items. Conclusion T2DM-CFIDBS presents good reliability and validity and could be applied in clinical practice.