Table 2.

Colorectal cancer, hemorrhoids and intestinal mucosa ulcer or erosion in the two groups

	Patients with schistosomiasis (N = 248)	Patients without schistosomiasis (N = 992)	p Valuea
Gender Male/Female	183/65/65	732/260
Age	60.5 ± 12.2	57.8 ± 11.6	0.164
Colorectal cancer	19 (7.7%)	57 (5.7%)	0.261
Age	69.2 ± 13.4	67.5 ± 9.7	0.016
Male/female	10 (52.6%)/9 (47.4%)	43 (75.4%)/14 (24.6%)	0.832/0.017
Site
Colon	12 (63.2%)	26 (45.6%)	0.185
Rectum	6 (31.6%)	26 (45.6%)	0.283
Colon and rectum	1 (5.3%)	5 (8.8%)	1.000
Left colon	12 (63.2%)	48 (84.2%)	1.000
Right colon	7 (36.8%)	8 (14.0%)	0.031
Entire colon	0 (0.0%)	1 (1.8%)	/
Scattered ulcer/erosion	22 (8.9%)	71 (7.2%)	0.359
Age	57.5 ± 13.0	57.5 ± 12.7	0.709
Male/female	11 (6.0%)/11 (16.9%)	44 (6.0%)/27 (10.4%)	1.000/0.142
Site
Ileocecal junction	7 (32.4%)	20 (28.2%)	0.835
Ascending colon	2 (8.7%)	6 (8.5%)	1.000
Transverse colon	0 (0.0%)	7 (9.9%)	0.188
Descending colon	1 (4.3%)	17 (23.9%)	0.063
Sigmoid colon	6 (26.1%)	20 (28.2%)	0.846
Rectum	11 (47.8%)	45 (63.4%)	0.186
Ulcerative colitis	2 (0.8%)	6 (0.6%)	0.664
Hemorrhoids	149 (60.1%)	519 (52.3%)	0.028
Age	60.9 ± 11.5	57.7 ± 11.3	0.527
Male/female	112 (61.2%)/37 (56.9%)	369 (50.4%)/150 (57.7%)	0.009/0.911
Internal hemorrhoids	146 (58.9%)	506 (51.0%)	0.027
External hemorrhoids	16 (6.5%)	82 (8.3%)	0.343
Mixed hemorrhoids	13 (5.2%)	69 (7.0%)	0.331

^aUsed student's t test to compare the age of the two groups. Categorical values compared with chi-square test (colorectal cancer, scattered ulcer/erosion, hemorrhoids), and Fisher's exact test was used when expected count of one set of samples was less than 5(ulcerative colitis, colon and rectum cancer, scattered ulcer/erosion of ascending colon, transverse colon and descending colon)