TY - JOUR

T1 - Construct validation and the Rasch model: functional ability of healthy elderly people.

AU - Avlund, K

AU - Kreiner, S

AU - Schultz-Larsen, K

N1 - Keywords: Activities of Daily Living; Aged; Classification; Cohort Studies; Factor Analysis, Statistical; Female; Geriatric Assessment; Humans; Likelihood Functions; Male; Models, Statistical; Multivariate Analysis; Questionnaires; Reproducibility of Results; Sensitivity and Specificity

PY - 1993

Y1 - 1993

N2 - The purpose of this study was to test the construct validity of a measure of functional ability, developed with the intention of achieving a high degree of variability and capacity for discriminating among a group of healthy elderly people. Data were collected from 734 70-year-old people in Denmark in the county of Copenhagen. Functional ability was measured with the traditional activities of daily living and with a classification system developed specially for healthy elderly people. Construct validity was tested by the Rasch model for item analysis, addressing specifically the internal validity by assessing the homogeneity of items under different conditions. The results show that the proposed measure of functional ability is a combination of six different dimensions, divided into 3 types: mobility function, lower limb function and upper limb function. With regard to these three types decreased functional ability can appear by either tiredness or reduced speed.

AB - The purpose of this study was to test the construct validity of a measure of functional ability, developed with the intention of achieving a high degree of variability and capacity for discriminating among a group of healthy elderly people. Data were collected from 734 70-year-old people in Denmark in the county of Copenhagen. Functional ability was measured with the traditional activities of daily living and with a classification system developed specially for healthy elderly people. Construct validity was tested by the Rasch model for item analysis, addressing specifically the internal validity by assessing the homogeneity of items under different conditions. The results show that the proposed measure of functional ability is a combination of six different dimensions, divided into 3 types: mobility function, lower limb function and upper limb function. With regard to these three types decreased functional ability can appear by either tiredness or reduced speed.

M3 - Journal article

C2 - 8310276

VL - 21

SP - 233

EP - 246

JO - Acta socio-medica Scandinavica

JF - Acta socio-medica Scandinavica

SN - 1403-4948

IS - 4

ER -