ArticleBMC geriatrics2026
Decomposing socio-economic inequalities in edentulism among community-dwelling older adults in a socially diverse metropolitan by using the Erreygers concentration index.
Article in BMC geriatrics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesEdentulism, the complete loss of natural teeth, profoundly affects the oral health and quality of life of older adults. Socio-economic disparities are a critical determinant of oral health outcomes. This study assessed and decomposed socio-economic inequalities in edentulism among community-dwelling older adults in Tehran in 2023. MATERIALS AND
methodsThe analytical study was employed data from the Oral Health Utilization Survey. Participants aged ≥ 60 years (N = 478) were selected using a stratified random sampling method. Data were collected using a validated questionnaire including socio-demographic variables, individuals’ oral health-related behaviors and oral health information, and outcome variable of edentulism. The Erreygers-corrected concentration index (ECI) was employed to demonstrate disparity and its gradient qualitatively and quantitatively. A decomposition approach based on logit model was used, and analysis was conducted by STATA 16.
resultsThe participants’ mean age was 68.9 (SD = 6.4) years. Approximately 48.0% of the participants reported no dental care utilization. The ECI was − 0.23 (95% CI: -0.31 to -0.15), indicating a pro-poor concentration of edentulism. Key contributors included wealth status (72.08%), chewing difficulties (-17.30%), and halitosis (5.02%). Notably, older age, living alone, and lower socio-economic status were associated with higher odds of edentulism.
conclusionEdentulism among older adults in Tehran is disproportionately concentrated among socio-economically disadvantaged groups. Edentulism was highly contributed to age, living arrangements, socio-economic status, and difficulty while chewing. Targeted public health interventions addressing socio-economic disparities and oral health promotion are essential to improve equity in oral health outcomes for the aging population.
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