Table 3 The improvement in functional disability risk discrimination when adding each physical function measure as continuous variables to the basic model

Basic model

0.770 (0.751 to 0.794)

Reference

Reference

Basic model + maximum gait speed

0.778 (0.759 to 0.803)^*

0.267 (0.173 to 0.368)^*

0.015 (0.007 to 0.024)^*

Basic model + one-leg standing time

0.782 (0.760 to 0.805)^*

0.405 (0.293 to 0.516)^*

0.022 (0.017 to 0.028)^*

Basic model + handgrip strength

0.775 (0.756 to 0.800)^*

0.129 (0.013 to 0.242)^*

0.009 (0.004 to 0.015)^*

Basic model + maximum gait speed + one-leg standing time

0.785 (0.764 to 0.809)^*

0.448 (0.336 to 0.551)^*

0.031 (0.023 to 0.041)^*

Basic model + maximum gait speed + handgrip strength

0.781 (0.761 to 0.805)^*

0.308 (0.196 to 0.427)^*

0.019 (0.010 to 0.029)^*

Basic model + one-leg standing time + handgrip strength

0.784 (0.763 to 0.807)^*

0.378 (0.272 to 0.517)^*

0.027 (0.021 to 0.035)^*

Basic model + all three physical function measures

0.787 (0.765 to 0.810)^*

0.429 (0.322 to 0.554)^*

0.034 (0.025 to 0.045)^*