[Calcium supplementation and bone absorptiometry in girls].

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.