Introduction: The Boston Bowel Prep Score (BBPS) is a validated tool to assess the quality of a patients bowel preparation in a standardized fashion. Given its utility and acceptance among gastroenterologists, we sought to identify patient factors that could potentially affect BBPS and, by extension, the indication to repeat a colonoscopy. Methods: We identified 1081 patients who had undergone outpatient colonoscopies by 11 gastroenterologists at our institution between 1 July 2017 and 31 December 2017. We analyzed the 388 (35.6%) with documented BBPS and excluded the other 693 (64.4%). BBPS was dichotomized at values greater than 6 (i.e. high) and at those less than or equal to 6 (i.e. low). We used t-tests to look for statistically significant differences in means for numerical variables for each BBPS category (Table 1). We used Fishers exact test to find statistically significant differences in the proportions having high or low BBPS for categorical variables (Table 2). A test level of 0.05 was considered significant. All analyses were conducted in R version 3.4.2 (R Core Team 2017, Vienna, Austria). Results: We found no statistically significant differences between the BBPS groups based on BMI, baseline creatinine or hemoglobin, or last hemoglobin A1c (Table 1). Patients who had previously undergone colonoscopies, who had diabetes, and who took high-volume (4.0L) bowel preparation had lower BBPS compared to those who had none of these (Table 2). We found no statistically significant differences in BBPS based on sex, ethnicity, insurance type, type of polyp found, or history of chronic kidney disease, anemia, or smoking. Conclusion: The BBPS groups had similar BMI, baseline renal function, hemoglobin, and hemoglobin A1c levels. While the high BBPS group was younger, it is unlikely to be clinically significant. There were no statistically significant differences in BBPS based on socioeconomic factors such as sex, ethnicity, or insurance type. Poorer compliance with high-volume (4.0L) bowel preparation may have led to lower BBPS than for low-volume (2.9L). Diabetics were more likely to have lower BBPS, possibly from difficulty complying with dietary restrictions leading up to the procedure along with autonomic dysmotility. Patients with prior colonoscopies had lower BBPS, which may reflect a pattern of poor compliance in the past. All colonoscopies at our institution will eventually incorporate BBPS and this will in turn allow us to further elucidate factors that may affect BBPS.