. 2009 Nov 4;17(1):134–142. doi: 10.1128/CVI.00289-09

TABLE 3.

Analysis of correlation of GSK 22F ELISA and WHO non-22F ELISA (study C)

Serotype	r^a	95% CI^b		Accuracy	Concordance correlation coefficient
Serotype	r^a	LL	UL	Accuracy	Concordance correlation coefficient
4	0.96	0.93	0.97	0.98	0.94
6B	0.85	0.76	0.91	0.87	0.74
9V	0.93	0.90	0.95	1.00	0.93
14	0.94	0.91	0.96	0.87	0.82
18C	0.92	0.89	0.95	1.00	0.92
19F	0.96	0.94	0.97	0.94	0.89
23F	0.90	0.86	0.93	0.93	0.84

r, coefficient of correlation (precision), calculated on the basis of the numbers of positive results by both assays (positivity thresholds, 0.35 μg/ml for WHO non-22F ELISA and 0.20 μg/ml for GSK 22F ELISA). Lin's CCC is the product of the correlation (r) and the accuracy (12).

CI, confidence interval; LL, lower limit; UL, upper limit.