Table 1.

Patient characteristics

	Group 1	Group 2	P
Sex# n (%) Male	20 (57.1%)	19 (54.3%)	0.810
Female	15 (42.9%)	16 (45.7%)
Age҂ (years)	35.23±11.20	35.31±11.55	0.953
Stone size҂ (mm)	6.34±1.57	6.40±1.61	0.848

^#Data analyzed with the Pearson chi-squared test.

^҂Data analyzed with the Mann-Whitney U test.