Table 1

PCNA expression in colonic mucosa

	PCNA-Labeling Index (%)
Normal colonic mucosa	18.1 ± 6.8
Group A	45.6 ± 3.3^1-a
Group B	48.2 ± 4.3^1-a
Group C	21.3 ± 4.8^1-b
Group D	24.2 ± 6.7^1-b
Group E	33.2 ± 9.5^1-b

Percentage of cells that are positive for PCNA staining are shown. Data are means ± S.E.

↵1-a P < 0.01, compared with normal control.
↵1-b P < 0.05, compared with groups A and B.