The Diagnostic Yield of Colonoscopy Stratified by Indications
Table 1
Indication group
1
2
3
4
5
Total
Patients enrolled
246
251
201
242
59
999
Median age (years)
63.8 (±12.9)
64.8 (±8.0)
66.7 (±8.9)
70.1 (±10.5)
52.1 (±17.7)
65.1 (±12.0)
Sex, M/F
129/121
143/108
154/96
131/120
44/52
601/497
Colonoscopies
250
251
250
251
96
1098
Positive colonoscopies (%)
63 (25.2)
42 (16.7)
113 (45.2)
37 (14.7)
34 (35.4)
289 (26.3)
Number of adenomas found
117
107
254
63
50
591
Colonoscopies with simple snare resection (%)
47 (18.8)
38 (15.1)
103 (41.2)
29 (11.6)
30 (31.3)
247 (22.5)
Referral to advanced endoscopic resection (EMR/ESD/TEMS)
17 (6.8)
10 (4.0)
16 (6.4)
1 (0.4)
1 (1.0)
45 (4.1)
Cancers found
2
3
0
1
1
7
The numerals act as synonyms for the indication groups. 1 = symptoms. 2 = positive screening for CRC cancer. 3 = surveillance after treatment of benign polyp. 4 = surveillance after treatment of colorectal cancer. 5 = surveillance of patients with high risk of developing hereditary colorectal cancer. Colonoscopies resulting in an uncountable number of polyps are not included. There were six colonoscopies with an uncountable number of polyps, five cases in group 5 and 1 case in group 1.
