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This study aims to develop a model for predicting the risk of severe fluoride is toxic to the bone in the elderly. And analysis of the factors affecting the incidence of skeletal abnormalities. The logistic regression analysis of data from the data collected by the International Coalition for Oral Health. By collecting data, behavioral health, water consumption. And assessment of skeletal and muscle pain. Of seniors in the district Talatkhwan. Choeng Doi Suthep, Chiang Mai, and were 50 and 30 respectively,
results showed that the development of the area. And quantity of drinking water per day. Affect the occurrence of fluoride toxicity bones in the elderly. Significance level of 0.05 and a predictive risk. log (odds) = 1.111 + 1.777 (a) -1.288 (amount of water to drink per day) where. The equation can describe the probability of occurrence of fluoride toxicity to bone was only 28.5 percent, and the prediction was correct 76.3 percent on Monday to determine the suitability of the prediction using the Hosmer and Lemeshow found. that the equation is appropriate (X = 6.343, p-value = 0.609) at the 0.05 significance level.
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