Abstract

Volume.124 Number.10

Original article : Clinical science

Development of the Low-Vision-Specific Function and Activities of Daily Living Measure (LVFAM)
Mineko Ono1,2, Yoshimi Suzukamo2, Shinshi Chin3, Ikumi Takatsu4, Tomoko Samezima5, Hisae Nakamura6, Hiroko Tanji1, Yoshitaka Yamagata7, Shin-ichi Izumi2
1 Visual Science Course, Department of Rehabilitation, Faculty of Medical Science and Welfare, Tohoku Bunka Gakuen University
2 Department of Physical Medicine and Rehabilitation, Tohoku University Graduate School of Medicine
3 Asahigaoka Eye Clinic
4 Department of Rehabilitation, Tohoku University Hospital
5 Department of Ophthalmology, Nippon Medical School Hospital
6 Department of Ophthalmology, Kansai Medical University
7 Yamagata Eye Clinic

Purpose: Although activities of daily living (ADL) are widely used as an index for evaluating rehabilitation, there is no ADL evaluation index for low-vision individuals in Japan. The present study aimed to develop an ADL evaluation index for low-vision individuals.
Subjects and methods: We gathered data from literature reported within and outside of Japan on ADL measurement in low-vision individuals as well as questionnaires in similar fields. We compared the data with the content of "activities" in the International Classification of Functioning, Disability and Health (ICF) to come up with a provisional index comprising 28 items related to "daily vision function" and 9 items related to "daily life activities." We used the provisional index to survey 186 low-vision individuals and then performed Rasch analysis. After performing Rasch analysis on each item during the scoring stage, we calculated the item difficulty and goodness-of-fit statistics for each parameter to determine the goodness-of-fit with the Rasch model. We also calculated converted values to create an interval scale of 0-100 points.
Results: Rasch analysis indicated that the scoring stage comprised 3 stages for the daily vision function parameters and 4 stages for the daily life activity parameters. After excluding items that did not fit the Rasch model, the evaluation index comprised 22 daily vision function items and 9 daily life activity items.
Conclusion: We successfully developed the low-vision-specific function and ADL measure (LVFAM) to perform evaluations based on the two stages of daily vision function and daily life activities.
Nippon Ganka Gakkai Zasshi (J Jpn Ophthalmol Soc) 124: 783-793, 2020.

Key words
Activities of daily living (ADL), ADL measure, Low-vision individuals, Rasch analysis, Rasch model, International Classification of Functioning, Disability and Health (ICF)
Reprint requests to
Mineko Ono, C. O., Ph. D. Visual Science Course, Department of Rehabilitation, Faculty of Medical Science and Welfare. 6-45-1 Kunimi, Aoba-ku, Sendai, 981-8551, Japan