Table 1.

Inter-scorer agreement between scorers A, B, and C and intra-scorer agreement (after a 4-week interval) for GM categories (Kappa values) and for the checklist (ICC).

	Kappa (normal vs. abnormal)	Kappa (categories)	ICC (95% confidence interval)
Inter-scorer agreement
Scorer A – Scorer B	K = 0.70 (gooda)	K = 0.78 (gooda)	ICC = 0.77 (0.51–0.90) (goodb)
Scorer A – Scorer C	K = 0.80 (gooda)	K = 0.69 (gooda)	ICC = 0.85 (0.66–0.94) (goodb)
Scorer B – Scorer C	K = 0.68 (gooda)	K = 0.56 (considerablea)	ICC = 0.78 (0.52–0.91) (goodb)
All scorers	K = (0.68–0.80) (gooda)	K = (0.56−0.78) (considerable-gooda)	ICC = 0.80 (0.63–0.91) (goodb)
Intra-scorer agreement
Scorer A	K = 0.90 (excellenta)	K = 0.85 (excellenta)	ICC = 0.89 (0.76–0.96) (goodb)
Scorer B	K = 1.00 (excellenta)	K = 0.93 (excellenta)	ICC = 0.96 (0.91–0.99) (excellentb)
Scorer C	K = 0.89 (excellenta)	K = 0.69 (gooda)	ICC = 0.89 (0.75–0.96) (goodb)

ICC, Intra-class correlation coefficient; K, Cohen Kappa.

^aAccording to Landis et al.²².

^bAccording to Portney et al.²¹.