Clinical predictors of colorectal polyps and carcinoma in a low prevalence region: Results of a colonoscopy based study

Table 1 Long lasting symptoms indicating a total colonoscopy and results regarding each symptom n (%)

Indicating symptom	Polyp	Cancer
Rectal bleeding (n = 142)	20 (14.1)	4 (2.8)
Diarrhea (n = 164)	7 (4.3)	1 (0.6)
Constipation (n = 48)	3 (6.3)	2 (4.2)
Altering bowel habit (n = 27)	1 (3.7)	1 (3.7)
Abdominal pain (n = 147)	16 (10.9)	7 (4.8)
Irritable bowel disease (n = 7)	1 (14.3)	0
History of polyp (n = 4)	0	0
Unexplained anemia (n = 35)	7 (20.0)	5 (14.3)
Cancer in other organs (n = 25)	4 (16.0)	2 (8.0)
Family history of cancer (n = 10)	2 (20.0)	0
Abnormal barium enema (n = 15)	3 (20.0)	0
Others (n = 8)	1 (12.5)	1 (12.5)

Table 2 Age distribution of colorectal neoplasm detected by total colonoscopy in Iranian symptomatic patients n (%)

	< 30 (n = 108)	30-39 (n = 110)	40-49 (n = 90)	50-59 (n = 88)	60-69 (n = 48)	70-79 (n = 31)	80 < (n = 3)	All (n = 480)
Colorectal cancer	0	0	2 (2.2)	6 (6.8)	4 (8.3)	4 (12.9)	0	16 (3.6)
Colorectal adenomatous polyp	5 (4.6)	10 (9.1)	11 (12.2)	18 (20.5)	7 (14.6)	5 (16.1)	0	56 (11.7)

Values in parentheses are percentages.

Table 3 Age and size of the polyp in the patients according to polyp location (mean ± SD)

	Size (mm)	Age (yr)
Rectum	8.83 ± 13.22	41.80 ± 13.83
Sigmoid	13.00 ± 8.48	57.33 ± 8.43
Descending colon	10.18 ± 9.08	49.69 ± 12.10
Transverse colon	5.16 ± 3.18	41.29 ± 20.05
Ascending colon	6.60 ± 1.51	59.20 ± 8.28
Caecum	8	51.50 ± 7.77