How Do Changes in Oral Health and Chewing Efficiency Affect the Changes of Oral-Health-Related Quality of Life of Nursing-Home Residents in the Short Term?

OBJECTIVE: To evaluate how changes in oral health and chewing efficiency affect the changes in oral-health-related quality of life (OHRQoL) of nursing-home residents over six months. METHODS: The study was conducted in nine nursing homes. Sociodemographic and general data were collected for all eligible individuals (n = 150). Of these, 114 participants (mean age 82.0 [± 9.5] years, 77.2% women) were available for the following tests at baseline and six months later: a comprehensive examination of dental and general health, a two-colour mixing-ability test (to assess chewing efficiency), the Geriatric Oral Health Assessment Index (GOHAI; to evaluate the OHRQoL), and the Mini Mental State Examination (MMSE; to diagnose the presence and severity of dementia). Univariate and multivariate linear regression models were compiled to analyse possible factors affecting OHRQoL. RESULTS: For the final analysis, 108 participants were available. For the study cohort as a whole, a decrease in the number of functional occluding pairs (C: 0.195; p = 0.034) and an increase in dental-treatment needs (C: -1.968; p = 0.056) had the greatest negative effects on OHRQoL as expressed by the GOHAI score. For denture wearers, a deterioration of denture condition (C: -2.946; p = 0.003) was the most important predictor for a decline in OHRQoL. CONCLUSION: A short-term decline in oral health and function affects the OHRQoL of nursing-home residents. The most important dental variables in this regard are the number of functional occluding pairs and dental and denture-related treatment needs.

Development of a German version of the Oral Health Assessment Tool.

BACKGROUND: Limited assessment tools for estimating the oral health of nursing home residents are available in the German language. AIMS: To develop a German version of the Oral Health Assessment Tool (OHAT) and to evaluate test-retest and inter-examiner reliability in use for the assessment of nursing home residents' oral health by caregivers before and after dental training. METHODS: The original English version of the OHAT was translated into German by a forward-backward translation process. Reliability assessments were conducted in a nursing home (n = 18) by independent application of the OHAT by two trained dentists and four professional caregivers. After receiving dental training, the caregivers repeated the OHAT with the same participants. Reliability analyses of single items were performed using Cohen's kappa statistics. Intra-class correlations were compiled to assess reliability of the total scores. T tests were used to compare percentage agreement, and under- and overestimation of findings between a reference dentist and the caregivers before and after the training unit. RESULTS: Specificity and sensitivity of the German OHAT were 87% and 86%. Test-retest reliability of the total OHAT score as estimated by the dentists was excellent (ICC 0.910; 95% CI 0.776-0.965). Before training, mean κ values between the reference dentist and caregivers ranged between 0.155 and 0.912, whereas the inter-examiner reliability of most items was only fair. After training, overall agreement between the dentist and the caregivers improved significantly from 62.1 to 83.1% (p < 0.001), as well as satisfying inter-examiner agreement for the single items. CONCLUSIONS: The German version of the OHAT is a reliable and valid tool for the assessment of oral health conditions of nursing home residents. When used by caregivers, instruction on the tool and practical training are mandatory to ensure reliable estimations. However, further studies with a larger sample size are encouraged to verify the outcomes of this study.