TABLE 1 Kappa Indices for Interobserver Agreement among Four Gastrointestinal Pathologists

From: Interobserver Variability in the Diagnosis of Ulcerative Colitis-Associated Dysplasia by Telepathology

Category

Kappa

P

95% Confidence Interval

Interpretationa

Digitalized images

    

 Negative

0.51

<0.001*

0.38–0.64

Good

 Indefinite

0.18

0.008*

0.05–0.31

Poor

 LGD

0.36

<0.001*

0.23–0.49

Poor

 HGD

0.54

<0.001

0.41–0.67

Good

 Overall

0.40

<0.001*

0.32–0.48

Fair

Microscopic slides

    

 Negative

0.46

<0.001*

0.33–0.59

Fair

 Indefinite

0.27

<0.001*

0.14–0.40

Poor

 LGD

0.51

<0.001*

0.38–0.64

Good

 HGD

0.45

<0.001*

0.32–0.58

Fair

 Overall

0.43

<0.001*

0.35–0.50

Fair

  1. LGD, = low-grade dysplasia; HGD, = high-grade dysplasia.
  2. *Significant agreement beyond chance.
  3. aPoor: kappa < 0.40, fair to good: 0.40 ≤ kappa ≤ 0.75, excellent: kappa > 0.75.
Back to article page