The interrelationship between the bone-mineral content of sites on the
radius or ulna and that of the femoral neck and lower thoracic vertebrae of
twenty-four human skeletons was determined. The average correlation
coefficients, -/r, were 0.82 and 0.57. Regression analysis showed that the
bone-mineral content of the radius provides a good estimate of the
bone-mineral content of the femoral neck (standard error of estimate
approximately 16 per cent). Multiple regression analysis using the age of
the subject and the bone-mineral content of the radius provides an equation
with a similar standard error of estimate for the vertebrae.