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作 者:陈新林[1] 古模发[2] 何伟玲[3] 刘慧[2] 黎建军[2] 莫传伟[1] 徐谦[1]
机构地区:[1]广州中医药大学基础医学院预防医学和卫生统计学教研室,广东广州510006 [2]中山大学肿瘤防治中心放疗科.华南肿瘤学国家重点实验室,广东广州510060 [3]中山大学第一附属医院胃肠外科,广东广州510080
出 处:《中华肿瘤防治杂志》2013年第18期1380-1384,共5页Chinese Journal of Cancer Prevention and Treatment
基 金:国家自然科学基金(81272575);广东省科技计划(2010B080701015);广东省医学科研基金(B2013163)
摘 要:目的:使用条目反应理论(itemresponsetheory,IRT)对鼻咽癌患者生存质量(qualityoflifefornasopharyngealcarcinoma,QOL—NPC)量表进行评价,了解QOL-NPC量表的微观表现,了解每个条目的计量心理学特征。方法:采用横断面研究,使用QOL—NPC量表调查387例鼻咽癌患者,对身体机能(physicaldomain,PH)、心理精神状况(psycholog—icaldomain,PS)、社会关系(socialdomain,SO)和不良反应领域(sideeffectdomain,SE)4个维度的条目构建部分评分模型,评价模型的信度系数,估计每个条目的阈值参数和残差,对性别、年龄和其他慢性病进行项目功能差异(differentiali—ternfunctioning,DIF)分析。结果:除了SO维度的信度系数为0.670外,其他维度的信度系数均〉0.8。条目PH2、PS5、PS6、S02、S03、S05、SE2、SE5、SE6和SE11的阈值出现颠倒情况,其他条目均未出现颠倒情况。条目的平均阈值位于-0.487-1.107,最大的为条目SE1(1.107),最小的为条目SE10(-0.487)。标准化残差绝对值〉2.5的条目有PH7、PS4、PS5和SE5,其余条目残差绝对值均〈2.5。DIF分析结果显示,所有的条目在性别、年龄和其他疾病均无一致性DIF和非一致性DIF。结论:QOL-NPC量表部分条目的拟合优度较差,出现颠倒的阈值,需要进一步完善。OBJECTIVE: To use item response theory (IRT) to analyze quality of life scale among nasopharyngeal carcinoma patients (QOL NPC), and understand the psychometric characteristic of QOL-NPC scale. METHODS: The cross-sectional study was used. Totally 387 nasopharyngeal carcinoma (NPC) patients were face-to-face interviewed with the QOL-NPC scale. Partial credit model was used to evaluated all items for each dimension (PH,PS,SO and SE dimen- sion). The reliability coefficient of each dimension,the threshold parameter and residual of each item were calculated. Dif- ferential item functioning (DIF) of each item among different gender,age,other diseases were tested. RESULTS: The reli- ability coefficient of all dimensions were greater than 0. 80, except SO dimension (0. 670). An ordered set of response threshold for almost each item was got, except for the item PH2,PS5,PS6, SO2, SO3, SO5, SE2, SE5, SE6 and SEll, and the others were not. The mean threshold parameters were between - 0. 487 and 1. 107, with the maximum item SE1 (1. 107) and the minimum item SE10 (-0. 487). The standardized residuals which were greater than 2.5 included item PH7, PS4,PS5 and SE5, the other standardized residuals were samller than 2.5. All the items didn't have uniform DIF or nonuniform DIF. CONCLUSIONS: IRT can provide accurate quantitative analysis on each item. Some items of QOL-NPC wasn't good, therefore it's necessary to improve.
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