Table 4.

Correlation between M. pneumoniae antibody titer found by CF antibody assay and Chlamydia-specific antibodies determined by rDNA LPS ELISA

Reciprocal M. pneumoniae CF antibody titerNo. of patients testedNo. (%) of patients seropositive by rDNA LPS ELISA
IgGaIgMbIgAc
  <43519 (54)2 (6)18 (51)
4–166935 (51)8 (12)37 (54)
32–1286943 (62)11 (16)40 (58)
≥2561715 (88)5 (29)12 (71)
  • a Correlation coefficient, 0.902;P = 0.098 (by chi-square test for trend,P = 0.020).

  • b Correlation coefficient, 0.975;P = 0.025 (by chi-square test for trend,P = 0.020).

  • c Correlation coefficient, 0.954;P = 0.049 (by chi-square test for trend,P = 0.201).