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© 1995 Oxford University Press

research-article

Fluoride in Drinking Water and the Bone Mineral Density of Women in Taiwan

CHUNG-FU LAN*, I-FENG LIN* and SHYH-JEN WANG{dagger}

*Graduate Institute of Public Health, National Yang-Ming University 155 Li-Long St., Sec 2, PeI-Tou, Taipei 112, Taiwan ROC
{dagger}Department of Nuclear Medicine, Veteran General Hospital Taichung, Taiwan, ROC

BACKGROUND: The current evidence on effect of fluoridation in drinking water on bone is inconsistent. This study was undertaken to assess the effect of fluoride concentration in drinking water on bone mineral density (BMD) in Taiwanese women.

METHODS: The study subjects included 248 women aged ≥40 years who reside in naturally fluondated and adjacent areas. The individual fluoride concentration of the drinking water and the BMD of the subjects' lumbar spines were assessed. Results. Women aged 46–65 years living in areas which have fluoride levels <0.6 mg/I (mean=0.18 mg/I; n=130) had slightly lower bone densities than women living in areas with levels ≥0.6 mg/1 (mean 0.98 mg/1, n=118). Only the age groups 46–50 and 61–65 years proved to be statistically significant. After controlling for age and body mass index, the BMD of those who had a dose >1.0 mg/1 is notably higher than the reference group (<0.6 mg/1). After stratification by menopausal status, fluoride appeared to have no association with bone density in postmenopausal women.

CONCLUSIONS: . The BMD of the subjects from the area with a fluoride dose >1 mg/I were significantly higher than those from the reference group (fluoride <0.6 mg/I) for premenopausal women. There is no significant association between BMD and fluoride for postmenopausal women in Taiwan.

Keywords bone mineral density, fluoridation

Revised 1 April 1995


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