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The Development of Physical Functioning Scale for Community-Dwelling Older Persons

Other Title
지역사회 노인의 신체기능 평가도구 개발
Authors
이, 윤환; 이, 경종; 한, 근식; 윤, 수진; 이, 연경; 김, 찬호; 김, 정림
Citation
The Korean journal of preventive medicine, 35(4):359-374, 2002
Journal Title
The Korean journal of preventive medicine; Yebang Ŭihakhoe chi; 예방의학회지
ISSN
0254-5985
Abstract
Objectives: To develop a physical functioning instrument for older adults living in the community.



Methods: A representative sample of 979 people aged 65 years or over were interviewed in-person. Of these, 199 people also completed a detailed in-hospital examination. The scale items were selected based on the frequency of endorsement, along with the item-total and inter-item correlations. The associations of the scale with their physical performance and clinical examination were analyzed to evaluate the criterion-related validity. Construct validity was assessed using factor analysis, and internal consistency through Cronbach's alpha and item-total correlations. Test-retest reliability was measured by agreement between the household survey and the repeat survey at the in-hospital examination.



Results: Initially, 23 items on the level of difficulty, ranging from no difficulty to an inability to complete a task, with the specific mobility and self-care tasks were included. Those with a high frequency of endorsement and a low inter-item or item-total correlations were excluded, resulting in a 10-item Physical Functioning (PF) scale. Equal weights were given to each item and a summated score was calculated. Significant associations were found between the PF scores and the physical performance, survey and clinical data. The scale revealed a 2-factor (mobility and self-care) structure. Cronbach's alpha was 0.92 and the item-total correlations were in the 0.63 to 0.78 range. Pearson's correlations for the test-retest ranged between 0.56 and 0.61.



Conclusions: The newly developed Physical Functioning (PF) scale showed good psychometric properties in older people. Further work, however, is needed to improve its sensitivity to discriminate higher levels of functioning, in addition to assessing its predictive value in detecting changes in health.
Keywords
AgedGeriatric assessmentMeasurementReliability and validity
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Preventive Medicine & Public Health
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