Association between socioeconomic and health factors and edentulism in people aged 65 and older – a population-based survey

Aims: To study edentulism and use of dental services in a population-based sample of people aged 65 years and older from northern Sweden and western Finland. Methods: In 2010, people aged 65, 70, 75 and 80 years who were living in one of 32 municipalities in northern Sweden and western Finland were invited to answer a questionnaire as part of the Gerontological Regional Database (GERDA) study (n = 6099). The questionnaire contained items related to socioeconomic status, general health and edentulism. Results: The prevalence of edentulism was 34.9% in Finland, compared with 20.6% in Sweden (p < 0.001), 31.9% in rural areas, compared with 20.9% in urban areas (p < 0.001), and 25% overall. The prevalence of edentulism rose from 17.8% in 65-year-olds, 23.8% in 70-year-olds, 33.5% in 75-year-olds and 37.3% in 80-year-olds (p < 0.001), and was 23.8% in women, compared with 27% in men (p < 0.001). In multivariate models, edentulism was associated with lower educational level (odds ratio (OR) 2.87, 95% confidence interval (CI) 2.31–3.58), low income level (OR 1.7, CI 1.09–1.47), residence in a rural area (OR 1.43, CI 1.23–1.66), male sex (OR 1.30, CI 1.12–1.52), dependence in instrumental activities of daily living (OR 1.48, CI 1.25–1.74), social isolation (OR 1.52, CI 1.17–1.98) and poor self-experienced health (OR 1.38, CI 1.17–1.62). Conclusions: One-quarter of the total sample was edentulous, with a higher prevalence of edentulism in Finland than in Sweden and in rural than in urban areas. Edentulism was associated with socioeconomic, psychological and health-related factors. These findings could be used to inform preventive measures and identify people aged 65 years and older who are in need of oral care.