TABLE 2.

Performance of the different ELISAs detecting anti-C. pneumoniae IgG or IgA in patient collectives 2 and 3^a

Group or test	% concordance with MIF result	% specificity	% sensitivity	PPV (%)	NPV (%)
Collective 2
IgG
SeroCP Quant	94	87	95	97	81
SeroCP	91	67	97	93	83
sELISA	90	87	91	97	68
rELISA	65	73	63	91	31
IgA
SeroCP Quant	86	85	89	96	65
SeroCP	95	95	95	98	86
Collective 3
SeroCP Quant	96	67	100	96	100
SeroCP	96	67	100	96	100

^aEighty samples from collective 2 and 50 samples from collective 3 were analyzed for C. pneumoniae antibodies by the indicated ELISA, and assay performance was evaluated on the basis of the gold standard MIF test.