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Table 3 Analysis of inter-reader agreement showing the percent of concordance and kappa of agreement

From: Differentiation of primary lung cancer from solitary lung metastasis in patients with colorectal cancer: a retrospective cohort study

CT features Number (% of concordance)a kappa (95% CIs)b
Cranial-caudal location 199/199 (100) 1 (1, 1)
Central-peripheral location 136/199 (68.3) 0.66 (0.50, 0.80)
Margin 174/199 (87.4) 0.80 (0.72, 0.87)
Density 192/199 (96.5) 0.83 (0.72, 0.95)
Air bronchogram 182/199 (91.5) 0.71 (0.58, 0.84)
Cavitation 188/199 (94.5) 0.80 (0.69, 0.91)
Pleural tags 180/199 (90.5) 0.80 (0.71, 0.88)
Pleural abutment 166/199 (83.4) 0.66 (0.55, 0.77)
Background emphysema 198/199 (99.5) 0.98 (0.94, 1.00)
  1. CI confidence interval
  2. aValues in parentheses are percentages
  3. bValues in parentheses are 95% CIs