Reliability and validity verification of the expanded prostate cancer index composite 26-item version in Chinese / 中国实用护理杂志

ABSTRACT

Objective@#To analyze the reliability and validity of the Expanded Prostate cancer Index Composite 26-item version (EPIC-26) in Chinese patients with prostate cancer.@*Methods@#Totally 402 patients with prostate cancer at the Fudan University Shanghai Cancer Center were invited to fill in the Chinese version of EPIC-26. 402 samples were divided into two parts by random number table method. 201 samples were analyzed by exploratory factor analysis and another 201 samples were analyzed by confirmatory factor analysis.@*Results@#The total Cronbach alpha coefficient of Chinese version EPIC-26 was 0.845, and the Cronbach′s α coefficient of each domain ranged from 0.576 to 0.957. The results of exploratory factor analysis showed that the Chinese version of EPIC-26 was a 5-factor model, which could explain 63.456% of the total variance. The results of confirmatory factor analysis were as follows χ2/df=1.641, GFI=0.863, AGFI=0.829, NFI=0.886, IFI=0.952, CFI=0.951, TLI=0.944, RMSEA= 0.057, which all met the standard of model fitting.@*Conclusion@#The Chinese version of EPIC-26 is a reliable and valid tool which is suitable for assessing the health-related quality of life of Chinese patients with prostate cancer.