title: Survey of vitamin D levels among post-menopausal Filipino women with osteoporosis.
abstract: OBJECTIVE
  To determine the prevalence of vitamin D inadequacy in a group of Filipino post-menopausal women with osteoporosis.
  
  
  METHODS
  Seventy otherwise healthy post-menopausal Filipino women seen at the University of Santo Tomas Hospital, Section of Rheumatology, were diagnosed with osteoporosis by central dual-energy X-ray absorptiometry (DXA) technique. Levels of serum 25-hydroxyvitamin D were measured using enzyme-linked immunosorbent assay.
  
  
  RESULTS
  The mean age of this population was 70 +/- 8 years, with an average of 22 +/- 10 years since menopause, and mean body mass index (BMI) of 22 +/- 1 kg/m(2). Only 30% (21/70) were on calcium plus vitamin D supplementation. Overall serum 25-hydroxyvitamin D levels ranged from 48-128 nmol/L, with a mean of 87 +/- 20.48 nmol/L. Serum 25-hydroxyvitamin D levels were divided as follows: 80-140 nmol/L (adequate), 25-79 nmol/L (inadequate/insufficient), and < 25 nmol/L (deficient). Sixty-four percent (45/70) of subjects had adequate levels while 36% (25/70) had inadequate levels of 25-hydroxyvitamin D. There were no subjects with deficient levels of 25-hydroxyvitamin D. Fischer's exact test did not show a significant association between BMD and 25-hydroxyvitamin D (P = 0.4804).
  
  
  CONCLUSIONS
  Among this group of women with post-menopausal osteoporosis, only 36% had insufficient levels of 25-hydroxyvitamin D, with none of the subjects having deficient 25-hydroxyvitamin D levels. The majority (64%) had normal serum 25-hydroxyvitamin D levels--comparatively higher than that reported in the literature. These results suggest the possible contribution of factors other than vitamin D deficiency in post-menopausal Filipino women with osteoporosis.
authors.affiliation: Section of Rheumatology, Clinical Immunology, and Osteoporosis, University of Santo Tomas Hospital, Manila, Philippines. oofindor@yahoo.com
authors.forename: Anne-Annette P
authors.initials: AA
authors.lastname: Raso
authors.forename: Sandra V
authors.initials: SV
authors.lastname: Navarra
authors.forename: Julie
authors.initials: J
authors.lastname: Li-Yu
authors.forename: Tito P
authors.initials: TP
authors.lastname: Torralba
mesh_terms: D000368:Aged; D044466:Asian People / Q000706:statistics & numerical data; D015519:Bone Density; D005260:Female; D006306:Health Surveys; D006801:Humans; D008875:Middle Aged; D015663:Osteoporosis, Postmenopausal / Q000097:blood / Q000453:epidemiology*; D010679:Philippines / Q000453:epidemiology; D017698:Postmenopause / Q000097:blood*; D015995:Prevalence; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood; D014808:Vitamin D Deficiency / Q000097:blood / Q000453:epidemiology*
chemical_list: D014807:Vitamin D; C104450:25-hydroxyvitamin D