ABSTRACT

To assess the relationship between urinary fluoride and micronutrients intake we recruited 121 schoolchildren from San Luis Potosí. We evaluated fluoride concentrations in drinking water and urine with the ion-selective electrode method and estimated calcium, magnesium, and phosphorus intakes with a validated consumption frequency questionnaire. About 72% of the population used tap water for drinking and cooking. Fluoride concentrations were 2.36 ± 0.02 mg/L in tap water, 0.14 ± 0.04 mg/L in bottled water and 2.05 ± 0.62 mg/L in urine. Urinary fluoride was higher in children with a consumption <50% of the Recommended Daily Intake (RDI) of calcium (2.20 v/s 1.96 mg/L; p < 0.05), <50% RDI of magnesium (2.58 v/s 1.96 and 1.90 mg/L; p < 0.05) and >150% RDI of phosphorus (2.43 v/s 1.82 mg/L; p < 0.05). These data indicated that fluoride concentration in tap water is higher than bottled water and estimated micronutrients intake is related to urinary fluoride.

摘要

为了评估尿氟和微量营养素摄入之间的关系，我们从圣路易斯波托西招募了 121 名学童。我们使用离子选择性电极法评估了饮用水和尿液中的氟化物浓度，并使用经过验证的消费频率问卷估算了钙、镁和磷的摄入量。大约 72% 的人口使用自来水饮用和烹饪。自来水中的氟化物浓度为 2.36 ± 0.02 mg/L，瓶装水中的氟化物浓度为 0.14 ± 0.04 mg/L，尿液中的氟化物浓度为 2.05 ± 0.62 mg/L。钙摄入量<50%（2.20 v/s 1.96 mg/L；p < 0.05）、镁<50% RDI（2.58 v/s 1.96 和1.90 mg/L；p < 0.05) 和 >150% RDI 的磷 (2.43 v/s 1.82 mg/L; p < 0.05)。