Oral health-related quality of life and loneliness: results based on a cross-sectional survey

BACKGROUND: The aim of this study was to clarify the link between oral health-related quality of life (independent variable) and loneliness (outcome) among the general adult population (also stratified by sex).

METHODS: Data were taken from a quota-based survey of the German general adult population (representative in terms of state, sex and age group), with n = 5,000 individuals (mean age was 46.9 years, SD: 15.3 years, ranging from 18 to 74 years). Oral health-related quality of life was quantified using the OHIP-G5. Loneliness was quantified using the De Jong Gierveld tool. Multiple linear regressions were conducted.

RESULTS: After adjusting for several covariates, multiple linear regressions revealed that poor oral health-related quality of life is associated with higher loneliness levels in the total sample (β = 0.12, p < 0.001). Such associations were also found in both sexes (men: β = 0.12, p < 0.001, women: β = 0.12, p < 0.001).

CONCLUSION: Study findings showed an association between oral health-related quality of life and loneliness. Such knowledge is important for addressing individuals at risk for higher loneliness levels. Future research is required to clarify the underlying mechanisms.