The vitamin D status of a cohort of postmenopausal non-institutionalized Canadian women
1986
Gibson, R.S. | Draper, H.H. | McGirr, L.G. | Nizan, P. | Martinez, O.B.
Extract: Dietary vitamin D intakes, calculated from three-day dietary records, and serum 25-OHD levels were determined in a cohort of 96 non-institutionalized Canadian women, of above average social status, aged 67.2 +/- 6.6 yr (mean +/- SD, range 58-89 yr). Dietary vitamin D intake (without supplements) was 4.3 +/- 2.2 ug/day; 20% of the subjects had intakes below the Canadian recommended nutrient intake (2.5 ug/day). Serum 25-OHD levels (mean +/- SD = 16.5 +/- 5.3 ng/ml) were not related to vitamin D supplement usage or season. Eight subjects had serum 25-OHD levels less than 10 ng/ml. They were all unsupplemented, constituting 11% of this subgroup and they were significantly older (72.3 +/- 9.3 yr) (p = 0.02) than subjects with serum 25-OHD values greater than 10 ng/ml (67.0 +/- 6.4 yr). There were indications that serum 25-OHD levels were positively correlated with dietary vitamin D intakes (r = 0.19; p = 0.07) and negatively correlated with age (r = -0.21; p = 0.05). Multiple regression analysis also indicated that serum 25-OHD levels were related to age and dietary vitamin D intakes (F = 4.25; p less than 0.02). The small number of subjects with low serum 25-OHD was consonant with the relatively high consumption of vitamin D fortified dairy products by the study group.(author)
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