IL6 and hydronephrosis: Eight factors emerged as potential risk factors: stone density (p < 0.001, OR = 5.15, 95%CI = 2.79–9.50), operation time (p < 0.001, OR = 2.16, 95%CI = 1.33–3.51), hydronephrosis (p < 0.001, OR = 0.33, 95%CI = 0.21–0.51), urine nitrite positivity (p < 0.001, OR = 2.38, 95%CI = 1.32–4.30), positive urine leukocytes (p = 0.030, OR = 1.71, 95%CI = 1.04–2.80), positive urine detection for bacteria (p < 0.001, OR = 2.43, 95%CI = 1.58–3.74), IL-6 levels (p = 0.020, OR = 1.15, 95%CI = 1.03–1.29) and percentage of Tph cell (p < 0.001, OR = 0.34, 95%CI = 0.25–0.47) (Table 3).