Table 4 Results of multiple logistic regression analyses determining the best predictors affecting stone culture proliferation.

From: Investigation of the predictive value of Hounsfield units in predicting stone culture results in urinary stone disease

 

OR (95% CI)

Wald

p-value

Model 1

   

URS

52.763 (8.857–314.322)

18.970

< 0.001

RIRS

8.223 (1.825–37.055)

7.524

0.006

Preoperative hydronephrosis grade

1.898 (1.289–2.795)

10.540

< 0.001

Operation duration

1.102 (1.053–1.154)

17.352

< 0.001

Stent or nephrostomy

4.232 (1.551–11.543)

7.938

0.005

HUproximal periphery < 807.0

2.367 (1.224–4.579)

6.551

0.010

AbsoluteHUdifference core & periphery > 179.5

2.060 (1.026–4.135)

4.131

0.042

RelativeHUdifference distal & proximal < 81.8

2.930 (1.376–6.237)

7.778

0.005

Model 2

   

Renal stones

12.397 (3.663–41.958)

16.377

< 0.001

Preoperative hydronephrosis grade

1.788 (1.225–2.609)

9.081

0.003

Duration of operation

1.065 (1.030–1.100)

14.041

< 0.001

Stent or nephrostomy

5.929 (2.138–16.444)

11.695

< 0.001

HUproximal periphery < 807.0

2.107 (1.112–3.994)

5.221

0.022

RelativeHUdifference distal & proximal < 81.8

4.290 (2.242–8.208)

19.349

< 0.001

  1. OR: odds ratio, CI: confidence interval. URS: ureterorenoscopy, RIRS: retrograde intrarenal surgery.
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