[Retracted] The Clinical Efficacy and Safety of Extracorporeal Shock Wave Lithotripsy in the Treatment of Patients with Urinary Calculi

Table 6

Comparison of stone removal between the two groups (%).

Groups		Successful one-time lithotripsy	Stone clearance rate
Control group	45	32(71.11)	40(88.89)
Observation group	45	43(95.56)	44(97.78)
	—	10.008	7.458
	—	0.002	0.005