[Calcium supplementation and bone absorptiometry in girls]

Abstract

Background: The achievement of a peak bone mass is an important factor in the prevention of osteoporotic fractures. In normal children, the amount of calcium intake could affect bone mineral increment.

Aim: To assess the effect of a daily 500 mg calcium supplement on bone mineral density, in a group of healthy Chilean girls.

Patients and methods: Fifty healthy girls were studied and 25 were randomly assigned to receive a 500 mg calcium supplement during 10 months. Bone mineral density of the distal and ultradistal region of the forearm was measured in all girls by single X ray absorptiometry (Osteometer DTX-100) at the beginning and end of the study. Bone mineral density was expressed as Z values.

Results: Significant increments in bone mineral density at the distal radioulnar region were obtained in the supplemented girls. No significant changes in bone density were observed in control girls.

Conclusions: A daily 500 mg calcium supplement for 10 months increased bone mineral density in healthy girls.