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Updated: Jun 12, 2026

Oral Health Assessment by Lay Personnel for Older Adults
Published on: February 2, 2020
Rasch analysis of the Geriatric Oral Health Assessment Index
Marco Franchignoni1, Andrea Giordano, Luca Levrini
1Dental School, Faculty of Medicine and Surgery, University of Insubria, Varese, Italy.
Abstract:
The aim of this study was to perform a psychometric analysis on the Geriatric Oral Health Assessment Index (GOHAI) using Rasch analysis, a modern statistical approach for examining rating scale data. Eighty-five subjects, long-term residents of a nursing home, were analysed using the GOHAI. The mean GOHAI score (range 0-48) was 11. Two of the five rating categories (1 = seldom; 3 = often) did not comply with the Rasch criteria for category functioning. After collapsing rating categories into a three-level rating scale (0 = never; 1 = sometimes; 2 = often/always), the new model met the set criteria. Item 12 'sensitivity to hot, cold or sweets' was misfitting. Rasch analysis showed both the unidimensionality of (at least) 11 of the 12 items of GOHAI, and the possibility of simplifying the structure of its rating scale.
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