Endoscopy 2018; 50(04): S113
DOI: 10.1055/s-0038-1637364
ESGE Days 2018 ePoster Podium presentations
20.04.2018 – Colonoscopy: quality
Georg Thieme Verlag KG Stuttgart · New York

CORRELATION BETWEEN COLONOSCOPY WITHDRAWAL TIME AND ADENOMA DETECTION RATE AND THEIR IMPACT ON QUALITY OF COLONOSCOPY

N Nekhaykova
1   Private Medical Center “Diagnosis and Prevention”, Yaroslavl, Russian Federation
,
S Kashin
2   Yaroslavl Regional Cancer Hospital, Yaroslavl, Russian Federation
,
T Kryukova
1   Private Medical Center “Diagnosis and Prevention”, Yaroslavl, Russian Federation
,
A Belova
2   Yaroslavl Regional Cancer Hospital, Yaroslavl, Russian Federation
,
E Krainova
2   Yaroslavl Regional Cancer Hospital, Yaroslavl, Russian Federation
› Author Affiliations
Further Information

Publication History

Publication Date:
27 March 2018 (online)

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Aims:

Both adenoma detection rate (ADR) and colonoscopy withdrawal time (CWT) are recognized as measures of colonoscopy quality. An increased CWT has been associated with increased ADR. The aim of our study was to examine the relationship between CWT and ADR.

Methods:

The study examined colonoscopies performed in Endoscopy department of Yaroslavl Regional Cancer Hospital (YRCH) and Endoscopy department of private medical center “Diagnosis and Prevention” between August 2016 and April 2017. We grouped all colonoscopies in the four levels of mean CWT and assessed ADR in each group. We included only patients with an adequate level of bowel cleansing. We used scopes Olympus 190 and 180 series HD.

Results:

987 patients (F 65,9%, M 34,1%; mean age 51) were included in the study. Cecal intubation rate (CIR)-92,3% (911 cases). Polyp detection rate (PDR)-49,3% (487 cases). Adenoma detection rate (ADR)-21,2% (209 cases). ADR in men-27%, ADR in women-16%. ADR 9,6% for the first group of colonoscopies with CWT≤6 min (374 cases) was compared to ADR 19,8% in the second group of 207 cases with CWT 7 – 9 min (p < 0,005). ADR for the first group was compared to ADR 29,2% (p < 0,001) for the third group (CWT 10 – 12 min, 192 cases). And ADR for the first group was compared to ADR 37,6% (p < 0,001) for the fourth group with CWT≥13 min (156 cases).

Tab. 1:

Detection diminutive polyps, right-side adenomas

CWT ≤6 minutes (n = 374)

CWT 7 – 9 minutes (n = 207)

CWT 10 – 12 minutes (n = 192)

CWT ≥13 minutes (n = 156)

All polyps

104

127

181

151

Diminutive polyps (size ≤5 mm)

13 (12,5%)

28 (22%)

76 (42%)

75 (49,7%)

Right-side adenomas

4 (3,8%)

10 (7,9%)

17 (9,4%)

26 (17,2%)

Conclusions:

Our data demonstrated that ADR is significantly decreased when CWT≤6 minutes. Increase of CWT is associated with high level of ADR, that leads to improving the quality of colonoscopy. The increase in adenoma detection was mainly of diminutive polyps and right-side adenomas.