Table 1 Patients’ and stones’ characteristics: proximal versus distal ureteral calculi in 88 patients treated with ureteroscopic Ho:YAG laser lithotripsy

Gender:

male/female

40/11

23/14

Age (years)*

53.9 ± 1.8

53.3 ± 3.0

0.829

Stone diameter (mm)*

10.7 ± 0.7

8.2 ± 0.6

0.020

Stone burden (mm²)

110.7 ± 17.6

64.4 ± 11.6

0.010

Number of patients with multiple stone burden (%)

3 (5.9)

5 (13.5)

0.225

Number of patients with prior treatments (%)

20 (39.2)

15 (40)

0.905

Number of patients with preoperative double-J stents (%)

19 (37.3)

6 (16.2)

0.032