June 2023 CME Activity: Item Analysis of Functional Measure Indicators in the National Health and Nutrition Examination Survey A Cross-sectional Study-Item Analysis of Functional Measure Indicators in the National Health and Nutrition Examination Survey A Cross-sectional Study

Item Analysis of Functional Measure Indicators in the National Health and Nutrition Examination Survey A Cross-sectional Study

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Researchers conducted a study to develop a function, activities, and participation measurement scale using questions from the National Health and Nutrition Examination Survey (NHANES). The cross-sectional study collected survey data from 2512 participants within the NHANES dataset. Exploratory and confirmatory factor analyses were conducted to evaluate the factorial structure and model fit of the NHANES instrument. A multidimensional Rasch modeling approach was used to analyze the response data. The results indicated that the NHANES function, activities, and participation measure demonstrated good internal consistency, reliability, and validity in a noninstitutionalized community-dwelling population. The item analysis revealed that "stoop/crouch/kneel," "stand for long periods," and "push/pull large objects" were the most difficult items, while "walk between rooms," "use fork/knife," and "leisure at home" were the easiest. The study concluded that the NHANES measure provides a standardized method of assessing functional status in the US population and can be useful for identifying functional limitations and changes in functional status over time. Further research is recommended to examine the measure's diagnostic and prognostic accuracy in predicting risk of hospitalization and institutionalization in older adults.

Keywords

function measurement scale

activities measurement scale

participation measurement scale

NHANES dataset

cross-sectional study

Rasch modeling approach

functional status

US population

diagnostic accuracy

prognostic accuracy