Skip to main content
European Radiology Experimental

Table 2 Intra- and interobserver agreement of dark-field and transmission signal grading

From: Imaging features in post-mortem x-ray dark-field chest radiographs and correlation with conventional x-ray and CT

 

Reader 1

Reader 2

Reader 3

Intraobserver agreement (κ values)

 Dark-field signal

0.959

0.971

0.793

 Transmission

0.907

0.918

0.790

Interobserver agreement (κ values)

 Dark-field signal

  Reader 1

–

0.848

0.828

  Reader 2

0.848

–

0.893

  Reader 3

0.828

0.893

–

 Transmission

  Reader 1

–

0.772

0.744

  Reader 2

0.772

–

0.700

  Reader 3

0.744

0.700

–

  1. Visual grading of dark-field signal and transmission shows substantial (weighted Cohen κ = 0.61–0.80) to almost perfect (κ = 0.81–1.00) intraobserver and interobserver agreement, according to Landis and Koch [29]. Time difference between reading sessions for assessment of intraobserver agreement was 4 weeks
Back to article page