Methods: This purposive sample of 666 subjects aged 55-90 were recruited from 4 studied cities in different part of Thailand. The Oral Impacts on Daily Performances (OIDP) was chosen as the index to assess the oral health–related quality of life. Face-to-face interview was performed by trained interviewers. Subjects were clinically examined and categorised into four groups; natural teeth (NT), natural and replace teeth (NRT), edentulous (Eden), and complete Denture (CD). Descriptive statistics and Kruskall-Wallis test were used to assess the relationship between different types of teeth and the total OIDP score.
Results: The average age of subjects was 69.9+6.2. There were 46.4% male and 53.0% female. 159 subjects (23.9%) were having natural teeth. 159 (23.9%) of older people had natural and replace teeth, 160 (24%) were edentate and 188 subjects (28.2%) wore complete dentures. Average total OIDP scores were 7.6 +12.8, 1.0+3.8, 1.1+4.6, and 0.9+3.7 in Eden, CD, NRT, and NT group respectively. There was statistical difference of the total OIDP scores among subjects with different types of teeth.
Conclusion: Subjects having different types of teeth perceived different impact from oral health on their daily performances. Edentulous older people perceived the highest oral impact.