DSSI-23量表用于农村老年人社会支持研究的信度效度分析

目的 分析DSSI-23量表用于农村老年人社会支持研究的信度和效度。方法 采用分层整群随机抽样法，抽取广元市702例60岁及以上、无严重听力障碍及精神问题的农村老年人作为调查对象，采用内部一致性信度、折半信度、内容效度、集合效度、区分效度和结构效度对DSSI-23量表的信度效度进行分析。结果 DSSI-23量表总的内部一致性信度为0.881；折半信度为0.918；各条目得分（除条目3）与总分的相关系数（r)均大于0.35（P<0．01）；集合效度与区分效度定标实验成功率均为100%；对量表的理论模型进行验证性因子分析发现，χ2/df=6.884，比较拟合指数(CFI)=0.807，拟合优度指数(GFI)=0.850，估计误差均方根(RMSEA)=0.092。结论 DSSI-23量表用于农村老年人社会支持研究的信度较好，但其结构效度较差，个别条目需进行适当的调整。

Reliability and Validity of DSSI-23 Scale in a Rural Elderly Population

Objective To determine the reliability and validity of the Duke Social Support Index (DSSI)-23 scale in a rural elderly population. Methods A stratified cluster random sampling strategy was adopted to select 702 rural participants aged 60 years or over in Guangyuan. Those with severe hearing disorders or mental problems were excluded. The reliability and validity of DSSI-23 scale were evaluated using internal consistency, split-half reliability，content validity, convergent validity, discriminant validity and structure validity. Results The DSSI-23 had a Cronbach’s α efficient of 0.881 and 0.918 split-half reliability. Item-scale correlation coefficients exceed 0.35 （P <0．01）, except for item three．Satisfactory (100%) convergent validity and discriminant validity were found. Confirmatory Factor Analysis (CFA) demonstrated unsatisfactory fit with the theoretical model of the scale:χ2/df=6.884， CFI=0.807，GFI=0.850，RMSEA=0.092. Conclusion DSSI-23 scale has good reliability in the elderly population, but unsatisfactory validity．Further adjustments of the scale are needed.