Psychometric Assessment of the Chinese Version of the Indian Vision Functioning Questionnaire Based on the Method of Successive Dichotomizations.

ABSTRACT:

Purpose

The purpose of this study was to assess whether a Chinese translated version of the 33-item Indian Vision Function Questionnaire (IND-VFQ-33) forms a valid measurement scale and to evaluate its psychometric properties based on the method of successive dichotomizations (MSD).

Methods

The English version of the IND-VFQ-33 was translated, back translated, and cross-culturally adapted for use in China. It was interviewer administered to patients with cataracts. MSD, a polytomous Rasch model that estimates ordered thresholds, was used to assess and optimize psychometric properties of the overall scale and three subscales separately.

Results

One hundred and seventy-nine patients provided complete responses. After the removal of 2 misfitting items, a revised 31-item

SUBMITTER: Gao R 

PROVIDER: S-EPMC8196417 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature