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Limited information is currently available on factors associating with oral diseases in Thai elderly. The aim of this cross-sectional analytical study was to examine the relationship between age, income, education, occupational status, knowledge, attitude, practice with plaque index, gingival index and effects of oral health. The samples consisted of 475 elderly. The average age was 66.5 ± 5.6 years, and 66.7% were female. Clinical oral examinations were performed. Data analysis using Spearman’s rank order correlation showed that an increase in knowledge, attitude, and practice of oral health care corresponded to lower plaque index (r=-0.172 p<0.001, r=-0.089 p=0.053 and r-0.101= p=0.028 respectively), lower gingival index (r=-0.131 p=0.004, r=-0.092 p=0.046 and r=-0.093 p=0.043 respectively) and fewer effects of oral health (r=0.185 p<0.001, r=0.162 p<0.001 and r=0.174= p<0.001 respectively). Relationship was found between age and effects of oral health (r=0.137 p= 0.003). Using a one-way between-groups analysis of variance, there was a statistically significant difference in the effects of oral health scores for those who had different occupational status (p=0.035). In conclusion, there is a need to address improving personal oral health care skills, especially in the elderly who are still in work and in the young elderly group.
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