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Table 2 Specificity and sensitivity of HUD in predicting stone-free rate at 3 months and relative univariate analysis

From: Clinical utility of computed tomography Hounsfield characterization for percutaneous nephrolithotomy: a cross-sectional study

  

ROC curve

Stone free

Univariate analysis

 

Cut-off

AUC

Sens

Spec

p

no (%)

yes (%)

OR

(95%- CI)

p

HUDST

<38.5

    

21 (55)

17 (45)

1.00 Ref

 

≥38.5

0.66

70%

63.8%

0.016

9 (23)

30 (77)

4.12

(1.54–10.99)

0.005

HUDB

<49

    

21 (54)

18 (46)

1.00 Ref

 

≥49

0.67

70%

61%

0.015

9 (24)

29 (76)

3.76

(1.42–9.99)

0.008

  1. Legend: HUD ratio between HU mean value and stone’s largest diameter at axial plane on soft tissue (ST) or bone (B) CT window, OR Odds ratio, CI Confidence interval