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目的:探讨食物中铅摄入及营养素摄入对儿童血铅的影响。方法:随机选择263名儿童进行血铅测定和膳食调查,并用原子吸收分光光度法测定食物中的铅含量,了解儿童铅及营养素的摄入量。根据血铅值分为高血铅组(≥100μg/L)及低血铅组(<100μg/L),对比两组食物中铅及营养素摄入量,采用Logistic回归分析各营养素摄入与血铅的相关性。结果:263名儿童血铅平均值为(80.84±42.79)μg/L,其中血铅值≥100μg/L的儿童有55名(20.91%)。食物中铅摄入量范围为3.99~43.9μg/(kg.d),均高于暂定每周摄入量(PTW I),高血铅组儿童铅摄入量较高,但总能量、糖类、纤维素、视黄醇、维生素B1、维生素B2、镁、磷等摄入量相应较低。Logistic回归分析显示,糖类、视黄醇是降低儿童血铅的因素。结论:机体血铅增高可能与铅摄入量较多,总能量、纤维素、维生素B1、B2、镁、磷,尤其是糖类、视黄醇摄入量相应较低有关。
Objective: To investigate the effects of dietary lead intake and nutrient intake on blood lead levels in children. Methods: A total of 263 children were randomly selected for blood lead determination and dietary investigation. The lead content in food was determined by atomic absorption spectrophotometry and the intake of lead and nutrients in children was also investigated. The blood lead levels were divided into high blood lead group (≥100μg / L) and low blood lead group (<100μg / L). The intake of lead and nutrients in the two groups were compared. Logistic regression analysis was used to analyze the relationship between the intake of nutrients and blood The relevance of lead. Results: The mean blood lead of 263 children was (80.84 ± 42.79) μg / L, 55 (20.91%) of them were children with blood lead level ≥100μg / L. The intake of lead in food ranged from 3.99 to 43.9 μg / (kg · d), both higher than the PTW I. Children with high blood lead had higher lead intake, but the total energy, Sugar, cellulose, retinol, vitamin B1, vitamin B2, magnesium, phosphorus and other intake of the corresponding lower. Logistic regression analysis showed that carbohydrates and retinol were the factors that reduced blood lead in children. Conclusion: The increase of body blood lead may be related to lead intake. The total energy, cellulose, vitamin B1, B2, magnesium, phosphorus, especially carbohydrate and retinol intake are correspondingly lower.