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

Table 6 Means and medians for the survival time (months) of ESCC patients with positive or negative expression of P. gingivalis and Lys-gingipain

Factors	Group	Mean^a				Median^a				p value
		95 % Confidence interval								p value
		Est.	Std. error	Lower bound	Upper bound	Est.	Std. error	Lower bound	Upper bound
Pg	Positive	20.139	2.238	15.752	24.526	19.000	5.874
	Negative	25.971	1.264	23.493	28.449
	Overall	23.981	1.225	21.580	26.382					0.036
KGP	Positive	22.475	1.507	19.521	25.430	27.000	1.648	23.770	30.230
	Negative	27.708	0.874	25.996	29.421
	Overall	23.981	1.225	21.580	26.382					0.048

^aEstimation is limited to the largest survival time; “Est.” and “Std.” are the abbreviations of “estimated” and “standard” respectively

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