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Table 5 Performance of the ADNEX model with vs. without CA 125 level in discriminating stage I OC vs. stage II–IV OC and stage II–IV OC vs. metastasis

From: Estimating the risk of malignancy of adnexal masses: validation of the ADNEX model in the hands of nonexpert ultrasonographers in a gynaecological oncology centre in China

ADNEX model

AUC (95% CI)

Sensitivity (95% CI) (%)

Specificity (95% CI) (%)

PPV (95% CI) (%)

NPV (95% CI) (%)

LR+ (95% CI)

LR- (95% CI)

DOR

aOptimal cut-off (%)

P

Benign vs. Stage II–IV OC

 With CA 125

0.99 (0.99–1.00)

100.00 (100.00–100.00)

98.97 (97.44–100.00)

92.73 (83.61–100.00)

100.00 (100.00–100.00)

97.09 (43.80–215.22)

0.00 (−)

0.00

42.95

0.03

Without CA 125

0.99 (0.99–1.00)

100.00 (100.00–100.00)

97.69 (96.15–99.23)

85.00 (77.27–94.44)

100.00 (100.00–100.00)

43.29 (22.70–82.57)

0.00 (−)

0.00

40.75

 

Stage I OC vs. Stage II–IV OC

 With CA 125

0.88 (0.80–0.96)

80.39 (68.63–90.20)

98.53 (95.59–100.00)

97.67 (92.68–100.00)

87.01 (80.95–93.15)

54.69 (7.78–384.48)

0.20 (0.11–0.35)

273.45

36.2

0.01

Without CA 125

0.94 (0.88–0.99)

84.31 (72.55–94.12)

98.53 (95.59–100.00)

97.78 (93.18–100.00)

89.33 (82.93–95.65)

57.35 (8.17–402.77)

0.16 (0.08–0.30)

358.44

30.55

 

Stage II–IV OC vs. metastasis

 With CA 125

0.86 (0.76–0.95)

100.00 (100.00–100.00)

84.31 (72.55–92.16)

33.33 (22.22–50.00)

100.00 (100.00–100.00)

6.37 (3.50–11.61)

0.00 (−)

31.25

0.01

 Without CA 125

0.97 (0.93–1.00)

100.00 (100.00–100.00)

96.08 (90.20–100.00)

66.67 (44.44–100.00)

100.00 (100.00–100.00)

25.51 (6.56–99.24)

0.00 (−)

15.2

 
  1. Comparison of AUC of ADNEX model with vs. without the inclusion of CA 125 level using the DeLong test
  2. AUC Area under the receiver operating characteristic curve, DOR Diagnostic odds ratio, LR+ Positive likelihood ratio, LR– Negative likelihood ratio, NPV Negative predictive value, OC Ovarian cancer, PPV Positive predictive value
  3. aOptimal cut-off, the maximum value of the Youden index