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Table 3 Pearson’s contingency coefficient analysis of the correlation between the levels of immunohistochemical staining of P. gingivalis and KGP in cancerous tissue of ESCC patients

From: Presence of Porphyromonas gingivalis in esophagus and its association with the clinicopathological characteristics and survival in patients with esophageal cancer

Antigens

KGP expression

R value

p value

+

-

Pg (+)

59

2

0.630

<0.0001

Pg (−)

7

32

Total

66

34

  1. *Data presented as the number of patients. P < 0.0001; Pearson’s contingency coefficient =0.630