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The study is intended to (create a model to identify symptoms and levels) developed a model to predict the risk of fluoride poisoning crisis to the bone in elderly people and analysis of factors that affect the occurrence of toxic fluoride deficiencies per bone. Using regression analysis, logistics, information that is used to analyze data collected from the development group's dental health cooperation sukrawang countries. Health information collected by General information Water consumption habits and evaluate the scheme and pain muscles of elderly people in Tambon Mae spicy yangoen Amphoe DOI Saket and t. suthep, amphur Muang Chiang Mai. The number of 50 persons and 30 persons respectively. Results of the regression analysis by means of kophu logistics Group (Multinomail logistic regression) found that fluoride levels in urine. Affect the classification levels of fluoride poisoning causes symptoms: bone in elderly people at the 0.05 significance level, and the equation logit equation 2 is logit_1 = 2.025-2.708 (quantity of fluoride greater than equal to 1 but less than 2)-3.114 (quantity of fluoride greater than equal to 2), logit_2 = 1.609-2.526 (quantity of fluoride. Is greater than equal to 1 but less than 2)-2.862 (quantity of fluoride greater than equal to 2), and logit_3 = 0 (since it is the symptom level in logit_3 phase 2 and 3 is the reference category has a value of 0), the equations describing the variation in levels of fluoride poisoning condition: only ro bone?Yala 24.8 (〖 〗 R_CS ^ 2 = 0.248) and 57.5 per cent correctly predicted from the equation logit analysis results by using the basic equation found in the signs and symptoms can be predicted only 2 levels level is, there are no symptoms, causes toxic fluoride and fluoride poisoning symptoms in phase 2 or 3 symptom scale only in the stage hotel.ี่ 1 does not show clear symptoms result in a difficult diagnosis, it has been analyzed by the method of kotwi logistics regression (Binary logistic regression) to create a seamless group of people who have symptoms of toxemia of fluoride poisoning symptoms and don't have a bone continue to find that the factors that affect the occurrence of toxic fluoride deficiencies per bone is.Quantity of fluoride in urine, as well as an analysis of classification levels, symptoms that a 0.05 significance level and in interpreting the log (odds) =-1.667 + 0.222 (quantity of fluoride in urine) The model was able to explain the variation in the occurrence of toxic fluoride deficiencies in the elderly only 12.3 per cent (〖 〗 R_CS ^ 2 = 0.123), and the equation accurately predicts 71.3 per cent when checking the suitability of the model by using the Hosmer and Lemeshow was found appropriate model (x ^ 2 = 1.233, p-value = 0.873) at 0.05 significance level.
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