Construction of a knowledge-attitude-practice scale of venous thromboembolism prevention in pregnant and lying-in women and its reliability and validity test
DENG Chen, WANG Li-jia
Third Xiangya Hospital of Central South University, Changsha, Hunan 410006, China
Abstract：Objective To develop a knowledge-attitude-practice scale of venous thromboembolism (VET) prevention in pregnant and lying-in women, and to test its reliability and validity. Methods A preliminary item pool was constructed by literature retrieval and expert focus interview. After two rounds of expert consultation, the item pool was further modified to form a preliminary scale, and a preliminary survey was conducted. The convenience sampling method was adopted to select pregnant and lying-in women who visited department of obstetrics of a third-grade class-A hospital in Changsha from September to October 2021 as the research subjects. Four methods including critical ratio method, correlation coefficient method, Cronbach's α coefficient method and factor analysis method were employed to pick out the items, and the final decision was made based on the specialty. The reliability and validity of the scale were tested. Results A total of 308 valid questionnaires were retrieved. The scale with 53 items was formed, including 28 items concerning knowledge dimension, 16 items concerning attitude dimension and 9 items concerning behavior dimension. Cronbach's α coefficients of knowledge, attitude, practice and total amount scale were 0.969, 0.961, 0.870 and 0.964, respectively. The split reliability was 0.912, 0.901, 0.701 and 0.694, respectively. The retest reliability was 0.816, 0.679, 0.715 and 0.799, respectively. As for content validity index (CVI), item-level CVI (I-CVI) ranged from 0.83 to 1, which were all greater than 0.780. Among scale-level CVI (S-CVI), average scale-level CVI (S-CVI/Ave) was 0.96, and universal agreement scale-level CVI(S-CVI/UA) was0.83. As for structural validity, exploratory factor analysis results showed that the cumulative contribution rate of the 8-factor model was 73.532%. The results of confirmatory factor analysis displayed that root mean square error of approximation (RMSEA), increnental fit index (IFI), Tacker-Lewis index (TLI) and comparative fit index (CFI) were 0.086, 0.850, 0.841 and 0.849, respectively. As for convergence validity, the factor load of each item was greater than 0.3, average variance extracted (AVE) of each latent variable was greater than 0.5, and construct reliability (CR) was greater than 0.8. As for discriminant validity, the dimensions of knowledge, attitude and behavior were significantly correlated, and the correlation coefficient was positive and less than 0.5 as well as AVE square root. Conclusion The scale has good reliability and validity, and can be used for the investigation and evaluation of VTE prevention in pregnant and lying-in women.
邓琛, 王丽佳. 孕产妇VTE预防知信行量表的构建及信效度检验[J]. 实用预防医学, 2022, 29(5): 626-631.
DENG Chen, WANG Li-jia. Construction of a knowledge-attitude-practice scale of venous thromboembolism prevention in pregnant and lying-in women and its reliability and validity test. , 2022, 29(5): 626-631.
2022, Vol. 29 
