Table 1

p values by Mann-Whitney testing of the differences between groups

	Ki67	Mcm5	Mcm2
LGD, low grade dysplasia; HGD, high grade dysplasia.
Squamous mucosa
Surface
Normal v LGD	<0.0001	0.0005	0.0029
Normal v HGD	<0.0001	<0.0001	<0.0001
Subsurface
Normal v LGD	<0.0001	0.0016	0.0022
Normal v HGD	<0.0001	<0.0002	<0.0001
Parabasal
Normal v LGD	NS	NS	NS
Normal v HGD	NS	NS	0.0216
Basal
Normal v LGD	0.0039	0.0498	NS
Normal v HGD	0.0113	0.0118	0.0048
Barrett's mucosa
Surface
Normal v LGD	<0.0001	<0.0001	<0.0001
Normal v HGD	<0.0001	<0.0001	<0.0001
Upper crypt
Normal v LGD	<0.0001	0.0002	0.0002
Normal v HGD	0.0009	0.0027	<0.0001
Lower crypt
Normal v LGD	NS	NS	NS
Normal v HGD	NS	NS	NS
Deep glands
Normal v LGD	NS	0.0117	NS
Normal v HGD	0.0055	NS	0.0059