Fig 1.

The 5-year predicted probability of hip fracture was calculated from an 11-item algorithm, which does not incorporate bone mineral density (BMD). The log of the predicted probability of hip fracture is compared with total hip BMD at baseline in the 10,418 women who had both determinations. A significant correlation is seen (regression line = 0.79, 0478 log predicted hip fracture; P < .001; r = 0.43). The predicted probability of hip fracture was also significantly associated (hazard ratio, 0.95; 95% CI, 0.90 to 0.99; P = .025) with breast cancer incidence when considered as a continuous variable in a model adjusted for age and race/ethnicity and stratified by Women's Health Initiative trial component.