Effect of preoperative ESM mass on hospital stay
Excluding 33 in-hospital mortalities, we analyzed the correlation between preoperative ESM mass and the duration of hospital stay in 86 patients. Overall, the ESM index presented a weak but significant negative linear correlation with the duration of hospital stay, whereas the HU of the ESM did not indicate a significant correlation (ESM index; r = -0.21, p < 0.05, HU of the ESM, p < 0.33) (Figure 2 ).