To determine the bone mineral density (BMD) of a group of natives from Tafi del Valle, Argentina, to examine possible differences compared to other populations.
BMD of lumbar spine and proximal femur was evaluated by dual x-ray absorptiometry (DEXA), in volunteer natives of El Potrerillo y El Rincon (descendants of the Amaichas and Quilmes).
Forty-seven women and 31 men between 20 and 80 years of age were assessed.
Average daily intake of calcium, physical activity level, serum levels of 25-OH vitamin D (25-OH-D), calcium, phosphorus and alkaline phosphatase were also determined.
Average calcium intake was 345 ± 22.4 mg/day (mean ± SD).
The average sunlight exposure was 3.8 ± 0.44 h. Degree of physical activity was moderate/hard (grade 4) to very hard (grade 6) in those 60 yrs of age or younger.
No significant differences were observed in the lumbar spine BMD.
The high physical activity required by the mountainous land of Tafi del Valle may be the cause of increased BMD at the proximal femur among these people.
High values of vitamin D produced by increased sun exposure can lead to greater absorption of calcium despite low calcium intake.
Greater physical activity, higher levels of vitamin D, and racial factors in the native population could explain the greater BMD seen in the proximal femur despite low calcium intake.
Mots-clés Pascal : Os, Homme, Densité, Elément minéral, Calcium, Argentine, Valeur, Référence, Normal, Ethnie, Amérique du Sud, Amérique
Mots-clés Pascal anglais : Bone, Human, Density, Inorganic element, Calcium, Argentina, Value, Reference, Normal, Ethnic group, South America, America
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0027531
Code Inist : 002B30A01A2. Création : 01/03/1996.