Journal of Clinical Endocrinology & Metabolism, Vol 57, 204-206, Copyright © 1983 by Endocrine Society

ARTICLES

Seasonal variation in serum concentrations of parathyroid hormone in elderly people

P Lips, WH Hackeng, MJ Jongen, FC van Ginkel and JC Netelenbos

In 124 patients with femoral neck fracture and 74 aged control subjects a seasonal variation was observed in the serum concentrations of 25- hydroxyvitamin D, 24,25-dihydroxyvitamin D, and PTH. The serum PTH concentrations were maximal in winter, when the vitamin D metabolites were lowest, suggesting a secondary phenomenon.

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