Periodontal disease among older people and its impact on oral health-related quality of life

Objective: The aim of the study was to evaluate the associations between degree of periodontal disease and number of teeth on oral health-related quality of life among older individuals. Material and methods: Randomly selected 804 participants aged >= 70 derived from two cohorts were included in the analysis. Dental examinations and evaluation of OHRQL using the OHIP-14 (Oral Health Impact Profile-14) were performed. After categorisation of the participants according to the extent of periodontitis in three groups (none, localised with <30% of teeth affected, generalised with >= 30% of teeth affected) and the number of teeth, associations between periodontal status and the number of teeth and the OHIP-14 scores were analysed. Multivariable regression analyses were used taking into account level of periodontitis, number of teeth, age and sex. Results: Among 70-year-old men and women, generalised periodontitis showed an association with poor OHRQL. However, a multivariable analysis failed to demonstrate this association (OR = 1.02, 95% CI: 0.72-1.44). In participants with 1-10 remaining teeth, the OHIP-14 score was significantly increased indicating poor OHRQL, compared with participants with >= 21 remaining teeth (OR = 1.57, 95% CI: 1.13-2.19). Similar findings were observed among women aged 70-92 years. Conclusions: Periodontitis did not show an association with poor OHRQL, however, a significant association between the number of teeth and poor OHRQL was found.