Table 3.
The correlation between the number of SCAs and CPET indices.
| CPET Parameters | Male | Female | ||
|---|---|---|---|---|
| τ | p Value | τ | p Value | |
| VO2@peak (L/min) | −0.307 | 0.000 | −0.230 | 0.01 |
| VO2@AT (L/min) | −0.312 | 0.000 | −0.261 | 0.004 |
| VO2kg@peak (mL/min/kg) | −0.235 | 0.000 | −0.158 | 0.08 |
| VO2kg@AT (mL/min/kg) | −0.245 | 0.000 | −0.172 | 0.056 |
VO2@peak, VO2@AT, VO2kg@peak and VO2kg@AT in male and female patients were arranged in descending order and then grouped into 4 groups, respectively. 1 to 4 were arranged into the four groups. Kendall’s tau-b test was used to evaluate the correlation between the number of coronary arteries with stenosis (≥ 50%) and converted CPET indices. τ—Kendall’s tau coefficient. p < 0.05 was considered as statistically significant. VO2@peak—peak oxygen uptake; VO2@AT—oxygen uptake at anaerobic threshold; VO2kg@peak—peak kilogram oxygen uptake; VO2kg@AT—kilogram oxygen uptake at anaerobic threshold; SCA—stenotic coronary arteries.