Figure 3.

Kaplan–Meier estimates of the time to slow gait (<1.0 m/s) stratified by the energetic cost of walking. A Kaplan–Meier estimate shows the difference in time to slow gait speed stratified by the energetic cost of walking. Those who have a normal cost (<0.17mL/kg/m) are shown using a dashed line and those who have a high cost (≥0.17mL/kg/m) are shown using a solid line. The log-rank test to compare differences in survival distributions revealed a significantly faster time to slow gait among those with a higher energetic cost of walking (p < .001).