Colorectal cancer in Guangdong Province of China: A demographic and anatomic survey

Table 5 Anatomic distribution, histology type, differentiation degree of CRC in different areas n (%)

Areas	Rectum	Left sided	Right sided	Total	Tubular adenocarcinoma	Papillary adenocarci-noma	Other adenocarci-noma	Total	Well-and moderately-differentiated	Poorly-differentiated	Total
Pearl Triangle area	2349 (54.3)	1039 (24.0)	939 (21.7)	4327 (100.0)	3436 (79.4)	363 (8.4)	528 (1.4)	4327 (100.0)	2914 (81.6)	627 (18.4)	3571 (100.0)
East area	901 (56.9)	363 (22.9)	319 (20.2)	1583 (100.0)	1165 (73.6)	271 (17.1)	147 (1.6)	1583 (100.0)	878 (77.1)	261 (22.9)	1139 (100.0)
North area	415 (53.1)	173 (22.1)	194 (24.8)	782 (100.0)	484 (61.9)	124 (15.9)	174 (0.9)	782 (100.0)	299 (47.8)	326 (52.2)	625 (100.0)
West area	769 (52.0)	355 (24.0)	356 (24.0)	1480 (100.0)	1097 (74.1)	15 (10.1)	368 (4.7)	1480 (100.0)	829 (63.6)	474 (36.4)	1303 (100.0)
Total	4434 (54.3)	1930 (23.6)	1808 (22.1)	8172 (100.0)1	6182 (75.6)	773 (9.5)	1217 (2.0)	8172 (100.0)2	4920 (74.8)	1718 (25.2)	6638 (100.0)3

¹χ² = 13.307, P = 0.038;

²χ² = 459.561, P = 0.000;

³χ² = 409.296, P = 0.000.