TABLE 1.
Levels of IgG antibodies against P. gingivalis, P. intermedia, and B. forsythus in RA and CTR group sera
| Sample | No. of samples | Mean (SD) IgG level (μg/ml)
|
Mean (SD) total IgG level (mg/ml) | ||
|---|---|---|---|---|---|
| P. gingivalis | P. intermedia | B. forsythus | |||
| RA serum | 116 | 9.85 (12.08) | 2.21 (1.72) | 3.92a (3.34) | 26.50b (10.04) |
| CTR | 100 | 7.70 (9.99) | 1.91 (1.10) | 4.65 (2.96) | 19.68 (8.29) |
a
P < 0.01 for differences in antibody levels between the patient group (RA serum) and the CTR group (CTR plasma) calculated by the Mann-Whitney U test.
b
P < 0.0001 for differences in antibody levels between the patient group and the CTR group calculated by the Mann-Whitney U test.