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Table 5 Inter-observer and intra-observer reliability

From: Quantitative videocapillaroscopy correlates with functional respiratory parameters: a clue for vasculopathy as a pathogenic mechanism for lung injury in systemic sclerosis

  Inter-observer (95% CI) Intra-observer (95% CI)
ICC for quantitative NVC features
 Capillary density 0.96 (0.93–0.98) 0.97 (0.93–0.98)
 Enlarged capillaries 0.87 (0.77–0.93) 0.93 (0.83–0.97)
 Giant capillaries 0.91 (0.83–0.95) 0.95 (0.90–0.97)
 Microhaemorrhages 0.97 (0.94–0.98) 0.99 (0.98–0.99)
 Tortuous capillaries 0.92 (0.85–0.95) 0.91 (0.69–0.96)
 Neoangiogenesis 0.77 (0.58–0.88) 0.81 (0.56–0.90)
Cohen’s κ coefficient for qualitative NVC features
 Cutolo’s patterns 0.83 (0.66–1.0) 0.81 (0.64–0.97)
 Normal pattern 0.92 (0.75–1.0) 0.83 (0.55–1.0)
 Early pattern 0.73 (0.42–1.0) 0.66 (0.33–0.99)
 Active pattern 0.82 (0.65–0.99) 0.87 (0.71–1.0)
 Late pattern 0.87 (0.69–1.0) 0.81 (0.59–10)
  1. CI confidence interval, ICC intra-class coefficient, NVC nailfold videocapillaroscopy