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Concordance between the immunohistochemistry with P. gingivalis whole cell antibodies and qPCR of P. gingivalis 16S rDNA in the cancerous tissue from patients with ESCC
| Approaches | PCR expression | Kappa value | p value | |
|---|---|---|---|---|
| + | - | |||
| IHC (+) | 60 | 1 | 0.736 | <0.0001 |
| IHC (−) | 11 | 28 | ||
| Total | 71 | 29 | ||
*Kappa value >0.7 excellent; 0.4–0.7, good; <0.4, poor agreement
