a nonsignificant trendP = 0.118
Higher left ABI correlated with greater improvement in stress test time (β = 10.55 minutes; 95% CI: 1.49-19.61 minutes; P = 0.025) and showed a nonsignificant trend for total test time (β = 13.66 minutes; 95% CI: −3.56 to 30.88 minutes; P = 0.118) ( Figure 4 ).