Table 2 Perioperative and Postoperative Data

Operation time, min (range)^a

78.75 ± 27.0 (42–141)

99.1 ± 29.5 (45–157)

<0.001

Postoperative hospitalization time, d (range)^a

5.9 ± 1.5 (4–9)

2.0 ± 1.0 (1–5)

<0.001

Drop in Hb level in g/dl (range)

13.3 ± 6.6 (1.1–37.4)

10.2 ± 4.4 (2.8–21.3)

0.004

Initial stone-free, n (%)

25 (35.7)

11 (19.6)

0.047

 PCNL

6 (10.0)

2 (3.6)

0.318

 RIRS

12 (20.0)

27 (48.2)

0.001

 Shock wave lithotripsy

7 (11.7)

19 (33.9)

0.004

Final stone-free rate, %

53 (88.3)

46 (82.1)

0.346

Preoperative serum creatinine in umol/L (range)

110.6 ± 38.1 (40.5–212.9)

113.8 ± 44.5 (18–263.4)

0.675

Postoperative serum creatinine in umol/L (range)

131.7 ± 57.4 (28.4–308.7)

136.6 ± 56.8 (28.8–305.5)

0.647

Complications (Clavein classification), %

19 (31.7)

14 (25.0)

0.426

 Fever (G I)(%)

7 (11.7)

9 (16.1)

0.492

 Urinary tract infection requiring additional antibiotics (G II) (%)

3 (5.0)

2 (3.6)

1.000

 Urine leakage < 12 h(G II) (%)

1 (1.7)

0

-

 Transfusion (G II) (%)

7 (11.7)

0

-

 Steinstrasse (G IIIa) (%)

0

2 (3.6)

-

 Sepsis (G IVa) (%)

1 (1.7)

1 (1.8)

1.000