Objectives Differences in oral health perceptions complicate comparisons of self-reported oral health in countries with consid- erably different cultures, traditions, and dental care. We compared it in China and New Zealand (NZ), to determine whether adults in those countries differ in how self-report oral health item responses distinguish those with different clinical oral disease states. Materials and methods Analysis of representative data on dentate 35–44-year-olds and 65–74-year-olds from the 3rd National Oral Health Survey of China in 2005 (for Sichuan province) and the NZ Oral Health Survey in 2009. Self-rated oral health in the Chinese survey was assessed by asking “Overall, how would you rate your oral health?”(responses: “Very poor,”“Poor,”“Fair,” “Good,” and “Very good”).TheNZsurveyasked “How would you describe the health of your teeth or mouth?” (responses: “Excellent,”“Very good,”“Good,”“Fair,” or “Poor”). To enable comparability, these were combined to create a four-category ordinal measure of self-reported oral health. The slope index of inequality (SII) and the relative index of inequality (RII) determined the extent to which the four-category self-report item distinguished those with better or poorer oral status. Results A higher proportion of Chinese than NZ 35–44-year-olds rated their oral health as poor or fair, and the NZ proportion rating their
Clinical Oral Investigations – Springer Journals
Published: Sep 29, 2018
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