Table 1.

Statistical agreements between three automated platforms for SARS-CoV-2 antibodies. Value of ĸ <0.20 poor agreement, 0.21-0.40 fair agreement, 0.41-0.60 moderate agreement, 0.61-0.80 good agreement, and 0.81-1.00 very good agreement. p-value <0.001 was statistically very significant.

Roche vs Abbott		Abbott		Total
		Positive	Negative
Roche	Positive	380 (54.8 %)	98 (14.1 %)	478 (68.9 %)
	Negative	4 (0.6 %)	212 (30.5 %)	216 (31.1 %)
Total		384 (55.3 %)	310 (44.7 %)	694 (100 %)
Kappa Value		0.694 (0.641−0.746)
McNemar’s Test		p-value <0.001
Total Agreement		85.3 %
Positive Agreement		79.4 %
Negative Agreement		98.1 %

Yhlo vs Abbott		Abbott		Total
		Positive	Negative
Yhlo	Positive	380 (54.8 %)	77 (11.1 %)	457 (65.9 %)
	Negative	4 (0.6 %)	233 (33.6 %)	237 (34.1 %)
Total		384 (55.3 %)	310 (44.7 %)	694 (100 %)
Kappa Value		0.758 (0.709−0.807)
McNemar’s Test		p-value <0.001
Total Agreement		88.3 %
Positive Agreement		83.1 %
Negative Agreement		98.3 %

Roche vs Yhlo		Yhlo		Total
		Positive	Negative
Roche	Positive	451 (65.0%)27 (3.9%)478 (68.9 %)	27 (3.9 %)	478 (68.9 %)
	Negative	6 (0.9 %)	210 (30.3 %)	216 (31.1 %)
Total		457 (65.9 %)	237 (34.1 %)	694 (100 %)
Kappa Value		0.892 (0.856−0.927)
McNemar’s Test		p-value <0.001
Total Agreement		95.2 %
Positive Agreement		94.3 %
Negative Agreement		97.2 %