Table 1.
Geometric mean titers (and standard deviations) of serum IgG and IgA antibody levels against toxin A and B of Clostridium difficile among cases and controls a.
| Cases (n = 50) GMT (SD) | Controls (n = 52) GMT (SD) | p Value b | |
|---|---|---|---|
| Toxin A | |||
| Serum IgG antibody | 20.1 (2.5) | 11.6 (2.1) | 0.001 |
| Serum IgA antibody | 6.8 (2.1) | 5.3 (2.0) | 0.08 |
| Toxin B | |||
| Serum IgG antibody | 18.0 (2.6) | 12.0 (2.7) | 0.04 |
| Serum IgA antibody | 7.2 (2.5) | 5.4 (2.2) | 0.09 |
a The results are expressed in ELISA units; b p value was obtained by Student’s t test; GMT: geometric mean titer; IgA: Immunoglobulin A; IgG: Immunoglobulin G; SD: standard deviation.