Table 5 Results of sensitivity analysis for standard PCNL

Stone-free rate

10

[12, 18, 19, 21, 22, 24]

463/459

0%

0.910

Fixed

0.32

0.747

0.992 [0.946,1.041]

SD

Operative time

7

[11, 12, 14, 17,18,19, 24]

266/262

62.8%

0.013

Random

1.98

0.048

−3.436 [−6.837,-0.036]

TB

Hospital stay

10

[11,12,15, 17,18,19, 21, 24]

480/476

96.9%

<0.0001

Random

10.02

<0.0001

−1.435 [−1.716,-1.154]

TB

Return to normal activity

7

[11, 13, 15, 18, 19, 21, 24]

385/381

97.5%

<0.0001

Random

5.44

<0.0001

−4.235 [−5.761,-2.709]

TB

Postoperative hemoglobin drop

8

[12, 14, 15, 17,18,19, 21, 24]

438/434

49.7%

0.053

Fixed

1.37

0.169

−0.018 [−0.043,0.008]

TB

Postoperative analgesic requirements

8

[11, 12, 14, 15, 18, 19, 21, 24]

405/401

91.4%

<0.0001

Random

4.79

<0.0001

−1.234 [−1.739,-0.729]

TB

Postoperative pain scores

7

[11, 13,14,15, 19, 21, 24]

383/378

94.9%

<0.0001

Random

6.35

<0.0001

−15.787 [−20.660,-10.913]

TB

Blood transfusion

7

[11, 13, 14, 17, 18, 22, 24]

226/226

0%

0.768

Fixed

0.62

0.538

0.785 [0.364,1.696]

TB

Fever

6

[14, 15, 17, 21, 22, 24]

333/333

0%

0.906

Fixed

<0.001

0.999

1.001 [0.521,1.922]

SD

Urine leakage

6

[14, 15, 17, 19, 21, 24]

386/381

40.4%

0.136

Fixed

3.64

<0.0001

0.259[0.125,0.537]

TB