FIG. 5.

Patients who had no residual stone fragments present on postoperative CT imaging had no significant difference in mean LE compared to patients with residual fragments remaining after surgery. There were 37 patients with no residual stone fragments with a mean LE of 74.1% and there were 25 patients with residual fragments who had a mean LE of 75.3%. Statistics performed by two-tailed unpaired t-test, comparing mean LE of both groups (ns, p = 0.588). Error bars show standard error of the mean. The y-axis starts from 50 to better illustrate differences between groups.