Ultrasonic parameters of bone in young normals: effect of age and sex.

This study was carried out in order to investigate the early effects of ageing on both broadband ultrasound attenuation and speed of sound through the os calcis. A total of 217 normal subjects, subdivided into 113 fertile women (age range 18-51 years, mean +/- 1 SD=29.4 +/- 8.