Table 1. Serum IgG titers to six periodontal pathogens, measured by enzyme-linked immunosorbent assay (ELISA).
| Pathogen | Disease group | Mean | SD | Median | P-value |
|---|---|---|---|---|---|
| Porphyromonas gingivalis | MCPa) | 234.53 | 84.53 | 242.11 | 0.065 |
| MoCPa) | 288.64 | 108.77 | 287.00 | ||
| SCPa) | 297.47 | 99.28 | 283.09 | ||
| Tannerella forsythia | MCPa) | 44.87 | 19.45 | 40.35 | 0.057 |
| MoCPa) | 56.32 | 29.78 | 48.96 | ||
| SCPa) | 53.63 | 19.39 | 52.55 | ||
| Treponema denticola | MCP a | 35.27 | 20.34 | 30.38 | 0.1 |
| MoCPa) | 37.85 | 17.78 | 35.75 | ||
| SCPa) | 40.83 | 14.21 | 40.71 | ||
| Fusobacterium nucleatum | MCPa) | 54.22 | 15.16 | 51.69 | 0.001 |
| MoCP a),b) | 58.99 | 25.57 | 55.74 | ||
| SCP b | 76.54 | 26.26 | 74.99 | ||
| Aggregatibacter actinomycetemcomitans | MCPa) | 217.74 | 56.13 | 234.33 | 0.003 |
| MoCP a),b) | 177.4 | 87.07 | 167.46 | ||
| SCP b | 153.13 | 68.87 | 139.43 | ||
| Prevotella intermedia | MCPa) | 269.12 | 11.42 | 245.76 | 0.167 |
| MoCPa) | 219.47 | 86.65 | 208.75 | ||
| SCPa) | 249.32 | 92.18 | 236.48 |
SD, standard deviation; MCP, mild chronic periodontitis (n=29); MoCP, moderate chronic periodontitis (n=27); SCP, severe chronic periodontitis (n=29)
Different letters (a, b) indicate a significant difference between two groups and identical letters (a, a) indicate that there is no difference between two groups.