[Concentration of 25-hydroxyvitamin D in postmenopausal women with low bone mineral density].
OBJECTIVE
This study was designed to determine mean serum concentrations of 25-hydroxyvitamin D (25OHD) in postmenopausal women with low bone mineral density (BMD), to find the cutoff of parathormone (PTH) elevation, and to evaluate the correlation 25OHD with BMD, biochemical parameters and vertebral fracture presence.


METHODS
Transversal study, with collection of 25OHD and PTH, and determination of DMO and column radiograph.


RESULTS
A high incidence of inadequate serum concentrations of 25OHD (68.3%) was found and 8% of secondary hyperparathyreoidism. No significant differences were found between 25OHD serum concentrations and the evaluated parameters, except for PTH, which showed a negative association. The established cutoff was 61.5 nmol/L.


CONCLUSIONS
The elevated incidence of hipovitaminosis D in elderly women with low BMD suggests that a systematic evaluation of 25OHD serum concentrations must be done for this population.The use of 61.5 nmol/L as a cutoff is recommended until the realization of an epidemiologic study that represents all Rio de Janeiro city (RJ, Brazil).
Russo
Luis Augusto Tavares
LA
Brasil Centro de Pesquisas Clínica, Rio de Janeiro, RJ, Brasil. luis.russo@ccbr.com
Gregório
Luiz Henrique de
LH
Lacativa
Paulo Gustavo Sampaio
PG
Marinheiro
Lizanka Paola F
LP
D000368:Aged; D000369:Aged, 80 and over; D015519:Bone Density / Q000502:physiology*; D001938:Brazil / Q000453:epidemiology; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D006962:Hyperparathyroidism, Secondary / Q000175:diagnosis*; D008875:Middle Aged; D015663:Osteoporosis, Postmenopausal / Q000097:blood*; D010281:Parathyroid Hormone / Q000097:blood*; D017698:Postmenopause / Q000097:blood*; D012016:Reference Values; D016103:Spinal Fractures / Q000453:epidemiology; D014807:Vitamin D / Q000031:analogs & derivatives* / Q000097:blood; D014808:Vitamin D Deficiency / Q000453:epidemiology
D010281:Parathyroid Hormone; D014807:Vitamin D; C104450:25-hydroxyvitamin D