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Physical Function Assessment of a Mayan Population Living With Osteoarthritis: The Importance of Considering Different Aspects of Functioning

Objectives: To assess the physical function of people living with osteoarthritis in a Maya-Yucateco rural community from 3 perspectives and explore factors associated with the presence of disability. Design: Physical function and social, physical, psychological, and behavioral factors were evaluated in all adults detected with hand, hip, and/or knee osteoarthritis (n = 144) through a Community-Oriented Program for the Control of Rheumatic Diseases–based census in the Mayan community of Chankom, Yucatán. All cases fulfilled the American College of Rheumatology criteria. Physical function was assessed from 3 perspectives: hypothetical or “what people think they can do” (Health Assessment Questionnaire-Disability Index [HAQ-DI]), experimental or “what people could do in standardized conditions” (6-minute walk test [6MWT] + the Functional Dexterity Test) and enacted or “what people actually do” (personal care, work, and leisure activities’ self-report). Results: About 80% of participants reported “mild” disability (HAQ-DI ≤ 1) in the hypothetical function perspective, whereas average experimental function scores were low (6MWT: 206 m, Functional Dexterity Test: 64 seconds), and 78% of participants reported problems with enacted function (ie, work). Pain was significantly associated with disability in the hypothetical perspective (odds ratio [OR] = 3 [95% confidence interval [CI]: 1-4]); levels of wealth (β = 5 [95% CI: 1-9]) and muscle strength (β = 54 [95% CI: 20-87]) were significantly associated with functioning in the experimental perspective; and lower levels of self-efficacy (OR = 12 [95% CI: 6-27]) and physical activity (OR = 12 [95% CI: 6-27]) were significantly associated with work disability in the enacted function perspective. Conclusions: People living with osteoarthritis in Chankom show important issues when assessing physical function at the experimental and enacted perspectives, which could have been overlooked if only the hypothetical perspective was considered. Different factors were associated with different physical function perspectives and all should be addressed to decrease disability in this community.