Table 2.

Intra- and inter-observer reliability of the visual evaluation.

	Acquired	Artifact-reduced
Intra-observer	Kappa [95% CI]	Kappa [95% CI]
Reader A	0.75 [0.66–0.84]	0.77 [0.70–0.86]
Reader B	0.95 [0.91–0.99]	0.93 [0.87–0.97]
Inter-observer
A1 versus B1	0.68 [0.59–0.78]	0.80 [0.72–0.88]
A2 versus B2	0.59 [0.48–0.69]	0.65 [0.55–0.74]

The analyses were performed using Cohen’s kappa statistics with 95% confidence intervals. CI, confidence interval.