Table 1 Clinical data of patients in PCNL and RIRS groups

Age, yr

52.22 ± 10.56

48.84 ± 11.27

0.098

Gender, n (%)

0.395

 Male

44 (73.3)

37 (66.1)

 Female

16 (26.7)

19 (33.9)

Laterality, left, n (%)

33 (55.0)

27 (48.2)

0.465

Stone size, mm(range)

29.6 ± 5.7 (20–44)

27.7 ± 4.7(20–39)

0.052

Site of stone, n (%)

0.438

 Pelvis

10 (16.7)

17 (30.4)

 Lower calyx

15 (25.0)

12 (21.4)

 Middle calyx

1 (1.7)

2 (3.6)

 Upper calyx

1 (1.7)

1 (1.8)

 Multiple

33 (55.0)

24 (42.9)

Hydronephrosis, n (%)

0.054

 None or mild

29 (48.3)

37 (66.1)

 Moderate or severe

31 (51.7)

19 (33.9)

Preoperative double-J stent, n (%)

9 (15.0)

55 (98.2)

<0.001

Preoperative nephrostomy, n (%)

3 (5.0)

0

-

Recurrent stone former, n (%)

26 (43.3)

30 (53.6)

0.270

Comorbidities, n(%)

 Diabetes mellitus

9 (15.0)

7 (12.5)

0.696

 Hypertension

13 (21.7)

9 (16.1)

0.442

 Heart diseases

4 (6.7)

2 (3.6)

0.739

 Renal insufficiency

13 (21.7)

9 (16.1)

0.442

Etiology of solitary kidney, n (%)

0.764

 Contralateral nephrectomy

26 (43.3)

28 (50.0)

 Congenital

1 (1.7)

1 (1.8)

 Functional

33 (55.0)

27 (48.2)

Stone composition, n (%)

0.307

 Calcium based

45 (75.0)

39 (69.6)

 Uric acid

6 (10.0)

11 (19.6)

 Infection

9 (15.0)

6 (10.7)