Role of high definition colonoscopy in colorectal adenomatous polyp detection

Table 2 Detection of all polyps, adenomas, and cancer n (%)

Parameters	HD group(n = 450)	SD2 group(n = 450)	P value
Total polyps detected	397	410	0.73
Non-adenomas	196 (51.3)	209 (52.0)	0.81
Non-advanced adenomas	150 (39.3)	150 (37.3)	0.84
Advanced adenomas	34 (8.9)	40 (10.0)	0.60
Cancer	2 (0.5)	3 (0.7)	1.00
Pathology not identified	15 (3.8)	8 (2.0)	0.14
< 6 mm	325 (81.9)	340 (82.9)	0.96
6-10 mm	50 (12.6)	44 (10.7)	0.45
> 10 mm	22 (5.5)	24 (5.9)	1.00
Size not specified	0	2	0.50
All patients
With non-adenomas	84 (18.7)	92 (20.4)	0.56
With non-advanced adenomas	84 (18.7)	83 (18.4)	1.00
With advanced adenomas	25 (5.6)	29 (6.4)	0.67
With cancer	2 (0.4)	3 (0.7)	1.00
Polyps per pt, mean (SD1)	0.88 (± 1.63)	0.91 (± 1.41)	0.77
Adenomas per pt, mean (SD1)	0.41 (± 1.04)	0.42 (± 0.94)	0.88
Advanced adenoma per pt, mean (SD1)	0.076 (± 0.35)	0.089 (± 0.38)	0.56
Adenocarcinoma per pt (mean)	0.004	0.006
Screening patients, n	216	173	0.07
With non-adenomas	49 (22.7)	36 (20.8)	0.81
With non-advanced adenomas	41 (19.0)	32 (18.5)	1.00
With advanced adenomas	13 (6.0)	14 (8.1)	0.55
With cancer	1 (0.5)	0 (0.0)	1.00
Non-screening patients, n	234	277	0.13
With non-adenomas	35 (15.0)	56 (20.2)	0.59
With non-advanced adenomas	43 (18.4)	51 (18.4)	0.21
With advanced adenomas	12 (5.1)	15 (5.4)	1.00
With cancer	1 (0.4)	3 (1.1)	0.63

¹Standard deviation;

²Standard definition; HD: high definition; Per pt: Per patient.