title: Seasonal variation in serum-25-hydroxyvitamin-D in the elderly in Britain.
abstract: In a group of thirty-six non-housebound normal people aged 70 to 88 years living independently in their homes, mean serum-25-hydroxyvitamin-D (+/- 1 S.D.) was 8-62 +/- 3-08 ng/ml in midwinter and had risen to 14-13 +/- 4-90 ng/ml the following September. These values were lower and the seasonal variation was less than previously found in healthy young British adults.
mesh_terms: D000367:Age Factors; D000368:Aged; D000469:Alkaline Phosphatase / Q000097:blood; D001798:Blood Proteins / Q000032:analysis; D002118:Calcium / Q000097:blood; D005260:Female; D006801:Humans; D006887:Hydroxycholecalciferols / Q000097:blood*; D008297:Male; D010710:Phosphates / Q000097:blood; D012621:Seasons; D012709:Serum Albumin / Q000032:analysis; D006113:United Kingdom; D014808:Vitamin D Deficiency / Q000097:blood
chemical_list: D001798:Blood Proteins; D006887:Hydroxycholecalciferols; D010710:Phosphates; D012709:Serum Albumin; D000469:Alkaline Phosphatase; D002118:Calcium