患者报告结局测量信息系统身体功能简表6b的测量学检验

Validation of the psychometric properties of the simplified Chinese version of PROMIS Physical Function Short Form 6 b

目的为国内癌症患者提供简便有效的身体活动能力自评量表。方法对患者报告结局测量信息系统(PROMIS)身体功能简表6b进行翻译和文化调适,形成中文版PROMIS身体功能简表6b;对240例癌症患者进行调查,检验简表的测量学属性。结果中文版PROMIS身体功能简表6b为6个条目的单维度结构,验证性因子分析,χ^(2)/df=2.260,CFI=0.983,TLI=0.971,SRMR=0.029,RMSEA=0.072;效标效度为r s=0.668,P<0.01;条目间最大标准化残差矩阵-0.349~0.184,Rasch分析模型单维度解释量为80.8%,各条目与总分相关系数为0.71~0.89,受试者信度为0.86,条目难度分布不存在重合;内部一致性Cronbach′sα系数=0.892;被试者填表时间1.0~1.5 min。结论中文版PROMIS身体功能简表6b具有良好结构效度、内容效度、受试者信度及效标效度,条目难度分布合理,内部一致性信度良好,答题便捷;可用于国内癌症患者身体活动能力自评。

Objective To provide a simplified and effective scale to measure self-reported physical function of cancer patients in China.Methods The PROMIS(v2.0)Physical Function Short Form 6b was translated into simplified Chinese and culturally adapted.Then 240 cancer patients were investigated to evaluate its psychometric properties.Results The Simplified Chinese version of PROMIS(v2.0)Physical Function Short Form 6b was a unidimensional scale containing 6 items.Confirmatory factor analysis supported a one-factor structure(χ^(2)/df=2.260,CFI=0.983,TLI=0.971,SRMR=0.029,and RMSEA=0.072).The criterion validity using the physical functioning dimension of SF-36 as the criterion was 0.668(P<0.01).The largest standardized residual covariance between items ranged from-0.349 to 0.184.The Rasch model explained 80.8%of the variance in the data.The item to total correlation coefficients ranged from 0.71 to 0.89,and the person reliability was 0.86.The item maps showed no overlap of the item difficulties.The Cronbach′sαcoefficient was 0.892.Participants could complete the short form in 1.0 to 1.5 minutes.Conclusion The simplified Chinese version of PROMIS(v2.0)Physical Function Short Form 6b has acceptable construct validity,content validity,person reliability and criterion validity,and shows reasonable distribution of item difficulties.It also has satisfactory internal consistency reliability and is convenient for filling out.It can be used as a self-report measure of physical function of cancer patients in China.