Abstract
In order to elucidate the influence of drinking water components and lifestyle on bone density, we carried out chemical analysis of the water drunk by 463 adult females (mean age: 49.9 ± 11.0 years) living in Saitama Prefecture, together with questionnaire survey and ultrasonic bone densitometry measurement. It was found that, in both pre- and post-menopausal women, the larger the body weight the higher the bone density. In the pre-menopausal group, furthermore, bone density tended to increase as the subjects did more frequently out-door activities and as Ca concentration in their drinking water was higher. In the post-menopausal women, higher bone density was associated with higher intake of milk and dairy products at present. According to statistical analysis, the factors whose correlations with bone density were greater in the order: frequency of out-door activities, Ca concentration in drinking water, and body weight for pre-menopausal women; body weight, and the consumption of milk and dairy products for post-menopausal women. Our present results indicated that, in addition to physical factors and lifestyle, Ca concentration in water was related to bone density, though only among women before menopause. In this particular area, therefore, the quality of drinking water might be an important factor which is related to bone density.
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