Age-related Differential Item Functioning for the Patient-Reported Outcomes Information System (PROMIS®) Physical Functioning Items.
Age-related Differential Item Functioning for the Patient-Reported Outcomes Information System (PROMIS®) Physical Functioning Items.
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DOI：
10.4172/2167-1079.1000131
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发表时间：
2013-03
期刊：
影响因子：
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通讯作者：
Sylvia H Paz;K. Spritzer;L. Morales;R. Hays
中科院分区：
文献类型：
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作者：
Sylvia H Paz;K. Spritzer;L. Morales;R. Hays
目的评价PROMIS® wave 1身体功能项目库按年龄（50岁或以上与18-49岁）划分的等效性。材料与方法共114个身体功能项目，5个反应选择，管理英语（n=1504）和西班牙语（n=640）的成年人。项目频率，平均值和标准差，项目规模的相关性，和内部一致性的可靠性进行了估计。按年龄评估项目功能差异（DIF）。结果114个条目中，有30个条目的DIF值大于或等于0.02。18-49岁的受访者的预期总分高于50岁或以上的受访者。50岁或以上与18-49岁具有相同身体功能水平的人对PROMIS®身体功能项目库中114个项目中的30个项目的反应不同。这项研究产生了重要的信息，在老年人与年轻人的身体功能项目的等效性。
PURPOSE To evaluate the equivalence of the PROMIS® wave 1 physical functioning item bank, by age (50 years or older versus 18-49). MATERIALS AND METHODS A total of 114 physical functioning items with 5 response choices were administered to English- (n=1504) and Spanish-language (n=640) adults. Item frequencies, means and standard deviations, item-scale correlations, and internal consistency reliability were estimated. Differential Item Functioning (DIF) by age was evaluated. RESULTS Thirty of the 114 items were fagged for DIF based on an R-squared of 0.02 or above criterion. The expected total score was higher for those respondents who were 18-49 than those who were 50 or older. CONCLUSIONS Those who were 50 years or older versus 18-49 years old with the same level of physical functioning responded differently to 30 of the 114 items in the PROMIS® physical functioning item bank. This study yields essential information about the equivalence of the physical functioning items in older versus younger individuals.