Fig. 2.

Plot of results of proportional hazards regression analyses. Hazard ratios (HRs) for incident hip fracture per tertile of thigh muscle attenuation after adjustment for age, height, BMI, gender, race, clinical site, self-reported health, chronic disease index, physical activity, and total femur BMD by DXA. HR values are normalized to the highest tertile, which is set to a value of 1.0. The trend of decrease in HR with increasing tertile is statistically significant. The lowest tertile of thigh muscle attenuation is significantly associated with incident hip fracture.