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目的分析水氟浓度与膳食氟含量之间的关系,为氟中毒防控提供依据。方法采用多阶段随机抽样方法,在6个省份各抽取6个水氟浓度不同的村,每个村随机称取10名8~12岁的儿童,采用双份饭法调查3 d 24 h膳食,检测膳食氟含量。采用单因素回归分析水氟浓度与膳食氟含量之间的关系。结果在调查的6个省份29个村的饮水水氟浓度范围在0.41~2.85 mg/L之间,均值和标准差为(1.25±0.54)mg/L。儿童膳食氟含量范围在2.19~8.76 mg/kg,均数和标准差为(4.69±2.11)mg/kg。水氟浓度与膳食氟对数之间的线性回归方程具有统计学意义(F=6.89,P<0.05),回归方程为logssf=0.505 4+0.114 8 sf,R2=0.20。结论水氟浓度与儿童膳食氟对数之间有普遍相关性。在饮水型氟中毒地区,除饮水外还应重视膳食氟的危害。
Objective To analyze the relationship between fluoride concentration in water and dietary fluoride content and provide evidence for the prevention and control of fluorosis. Methods A multi-stage random sampling method was used to select six villages with different fluoride concentrations in six provinces. Ten villages aged 8 to 12 were randomly sampled from each village. The double-meal method was used to investigate the diet for 3 days and 24 hours. Detection of dietary fluorine content. The relationship between water fluoride concentration and dietary fluorine content was analyzed by single factor regression. Results The fluoride concentration of drinking water in 29 villages in 6 provinces in the survey ranged from 0.41 to 2.85 mg / L with the mean and standard deviation of (1.25 ± 0.54) mg / L. Children’s dietary fluoride content ranged from 2.19 to 8.76 mg / kg, with a mean and standard deviation of (4.69 ± 2.11) mg / kg. The linear regression equation between water fluoride concentration and dietary fluoride logarithm was statistically significant (F = 6.89, P <0.05). The regression equation was logssf = 0.505 4 + 0.114 8 sf, R2 = 0.20. Conclusion There is a general correlation between water fluoride concentration and children’s dietary fluoride logarithm. Drinking water fluoride poisoning areas, in addition to drinking water should also attach importance to the dangers of dietary fluorine.