Table 3.

Inter-rater Concordance for C5b-9 Grading

	Mean % Agreement	Mean % Disagreement	Krippendorff’s Alpha
Nerve C5b-9
Overall	84%	16%	0.842
0	95%	5%
1+	70%	30%
2+	92%	8%
Muscle C5b-9
Overall	73%	27%	0.76
0	94%	6%
1+	53%	47%
2+	79%	21%