• Katrin Bekes, Maisa Omara, Sabrina Safar, and Tanja Stamm.
• University Clinic of Dentistry, Department of Paediatric Dentistry, Medical University Vienna, Sensengasse 2a, 1090, Vienna, Austria. katrin.bekes@meduniwien.ac.at.
• Clin Oral Investig. 2019 Dec 1; 23 (12): 4449-4454.

ObjectivesThe aims of this study were to develop a German version of the Early Childhood Oral Health Impact Scale (ECOHIS), a measure of oral health-related quality of life in pre-school-age children, and to assess the instrument's reliability and validity.MethodsThe original English version of the ECOHIS questionnaire was translated into German (ECOHIS-G) by a forward-backward translation method. A total of 336 children aged 0 to 5 years and their caregivers who were recruited at the Department of Paediatric Dentistry in Vienna, Austria, participated in this study. The caregivers completed the ECOHIS-G and their children were clinically examined for the presence of dental caries and plaque accumulation. Reliability of ECOHIS was investigated in a subsample of 59 subjects after 3 weeks.ResultsQuestionnaire summary score test-retest reliability was 0.81 (intraclass correlation coefficient, 95% confidence interval (CI) ranging from 0.68 to 0.89) and internal consistency was 0.83 (Cronbach's alpha, lower limit of the 95% CI 0.80). Validity of the ECOHIS-G questionnaire was supported by correlation coefficients with global ratings of oral health of - 0.42 (95% CI - 0.45 to - 0.35) and overall well-being of - 0.29 (95% CI - 0.34 to - 0.22) which met the expectations. Mean ECOHIS-G scores were statistically significantly higher in children with caries compared with caries-free children.ConclusionsThe German version of the ECHOHIS was found to be reliable and valid in children aged 0 to 5 years.Clinical RelevanceThese findings enable assessments of oral health-related quality of life in German-speaking pre-school children.

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