ADENOMA DETECTION RATE CORRELATIONS WITH SECONDARY COLONOSCOPY QUALITY INDICATORS

Aims:

Measurement of adenoma detection rate (ADR) is cumbersome in clinical practice. In order to calculate it indirectly, associations of ADR with easier to measure quality indicators are under investigation. We aimed to examine the association of ADR with secondary colonoscopy quality indicators.

Methods:

This is a retrospective study in a University endoscopy facility that enrolled consecutive patients aged > 50 years who underwent colonoscopy for screening (cohort 1), surveillance (cohort 2) and diagnostic (cohort 3) indications by 5 endoscopists, between 1 January 2014 and 31 December 2015. We correlated ADR with the mean number of adenomas per colonoscopy (APC) and the mean number of adenomas per positive colonoscopy (APPC), in different colonoscopy indications cohorts. Additionally, we explored the association of screening ADR with overall (all colonoscopy indications included) ADR, APC and APPC. Correlations were examined with Pearson's r.

Results:

A total of 1918 colonoscopies were included; the distribution of indications was 30%/30%/40% for cohorts 1/2/3, respectively. ADRs were significantly correlated (r = 0.94, 0. 97 and 0.88; p < 0.02) to APCs, in each of the 3 cohorts and in the whole population (r = 0.94; p = 0.009), as well. On the contrary, no correlation was detected between ADR and APPC in any cohort. Screening ADR was not correlated with either overall ADR (r = 0.70; p = 0.09) or overall APC (r = 0.42; p = 0.24) or overall APPC (r = 0.33; p = 0.29).

Conclusions:

In our population, screening ADR was not correlated to the studied overall colonoscopy quality indicators. However, ADRs was correlated to APCs in each colonoscopy indication cohort.