A Korean experience of the use of Boston Bowel Preparation Scale: A Valid and Reliable Instrument for Colonoscopy-Oriented Research

Background/Aims: Few bowel preparation scales have been validated. The Boston Bowel Preparation Scale (BBPS) is a novel bowel preparation scale in western countries. We validated the BBPS in Korean patients and assessed the relationship between the colon polyp detection rate and BBPS score. Patients and Methods: This study was a prospective, single-center trial. The BBPS is a 10-point scale that assesses bowel preparation after the completion of all cleansing maneuvers. We assessed three segment scores (the right side, transverse section, and left side) and total BBPS scores during screening colonoscopy. In addition, we compared the BBPS scores with clinically meaningful outcomes such as the polyp detection rate and colonoscope withdrawal times. Results: We enrolled 482 screening colonoscopies between January 2011 and January 2012. The mean (+/- standard deviation [SD]) BBPS score was 8.1 +/- 1.1. Higher BBPS scores (>= 8 vs < 8) were associated with a higher polyp detection rate (44.9% vs. 33.0%, P = 0.042). The BBPS scores were inversely correlated with colonoscope withdrawal times (r = - 0.167, P < 0.001). Conclusions: The BBPS is a valid and reliable measure for assessing bowel preparation during colonoscopy in Korean patients. The polyp detection rate is higher in patients with higher BBPS scores than in those with lower BBPS scores during a colonoscopic procedure.