TABLE 3.

Within-center agreement between two C. pneumoniae panels of 60 specimens performed 1 month apart^a

Center or test	Copy no.	No. of specimens with the following resultsb:				Agreement	Kappac
		+/+	+/−	−/+	−/−
LCx	5.06-121.08	12	0	0	0	12/12
	0.51-12.11	11	0	0	1	12/12
	0.05-1.21	6	4	1	1	7/12
	0.01-0.12	0	1	1	10	10/12
	0.00	0	0	0	12	12/12
LCx	Total	29	5	2	24	53/60	0.77
A	Total	15	8	4	33	48/60	0.56
B	Total	17	9	2	32	49/60	0.61
C	Total	14	13	2	31	45/60	0.48
D	Total	23	0	8	29	52/60	0.74
E	Total	4	8	7	41	45/60	0.19

^aTechnologists were blinded to the identity of samples, and the order was randomized separately for each panel.

^bSymbols: +, positive; −, negative. The two symbols listed are the result of the first test/result of the second test.

^cKappa measures the agreement beyond change, with 0.0 indicating no agreement and 1.0 indicating perfect agreement. For all kappa values, P < 0.001.