肿瘤患者置入 PICC 知信行量表的信效度评价

目的：对初步构建的肿瘤患者置入PICC知识、态度、行为量表进行项目分析及信效度评价。方法采用横断面调查，通过极端组法、相关分析和因子分析三种方法联合筛选初始量表的条目，保留条目为30个，对其信效度进行评价。结果知识、态度、行为问卷的Cronbach ’ s α系数分别为0．729，0．826，0．765，折半信度分别为0．705，0．774，0．735。量表总体的Cronbach’sα系数为0．834，折半信度为0．725。量表的内容效度各条目与所属领域的相关系数知识部分为0．346～0．584，态度部分为0．652～0．735，行为部分为0．567～0．673。探索性因子分析根据理论模型提取3个公因子，经两次因子分析和正交旋转，得到24个条目的3个共同因子的累积方差贡献率为40．388％，各条目的因子负荷值均＞0．4，共同度均＞0．2。结论自行编制的肿瘤患者置入PICC量表经严格的心理测量学分析后，信效度较好，具有一定的临床应用价值，但仍需进一步完善。

Reliability and validity on the knowledge,attitude and behavior scale in cancer patients with PICC

Objective To analyze and evaluate the reliability and validity of a 30-items initial survey scale concerning the knowledge , attitude and behavior in cancer patients with peripherally inserted central catheters （ PICC） .Methods The initial items were analyzed and thirty items were screened out by combining extreme group discrimination method , correlation analysis and factor analysis .The reliability and validity of 30-items survey scale was also evaluated .Results The Cronbach’s alpha coefficients of knowledge , attitude, and behavior were respectively 0.729, 0.826 and 0.765, the split-half reliability of knowledge , attitude, and behavior were 0.705, 0.774 and 0.735, the Cronbach’s alpha coefficients of overall scale was 0.834, and the split-half reliability of overall scale was 0.725.The correlation coefficients of each item in content validity of knowledge, attitude, and behavior were among 0.346-0.584, 0.652-0.735 and 0.567-0.673.According to the theoretical model , three common factors were extracted by exploratory factor analysis .By using two factor analysis and orthogonal rotation , the cumulative variance contribution rate of three common factors from 24 items was 40.388%, factor loading value of each item was more than 0.4 and communality of each item was more than 0.2.Conclusions Self-designed survey scale of the cancer patients with PICC has met the criteria of statistics after rigorous psychometric analysis , and has the potential to be used in clinic but also still needs for further improvement .