Table 1.

Protein expression in three groups of Barrett esophagus patients

	No. of Barrett esophagus patients
Protein expression	without dysplasia (n = 22)	with dysplasia (n = 37)	with esophageal adenocarcinoma (n = 11)	P	effect
MutL homologue 1
lost	11	12	9	0.014	0.330*
positive	11	25	2
MutS homologue 2
lost	4	0	0	0.019	0.342*
positive	18	37	11
Postmeiotic segregation increased 2
lost	12	13	9	0.019	0.318*
positive	10	24	2
MutS homologue 6
lost	4	0	0	0.018	0.342*
positive	18	37	11
Tumor protein p53
negative	3	5	2	>0.999
positive	19	32	9

*χ² test.