AIM To investigate whether adenoma and polyp detection rates(ADR and PDR, respectively) in screening colonoscopies performed in the presence of fellows differ from those performed by attending physicians alone. METHODS We performed a retrospective review of all patients who underwent a screening colonoscopy at Grady Memorial Hospital between July 1, 2009 and June 30, 2015. Patients with a history of colon polyps or cancer and those with poor colon preparation or failed cecal intubation were excluded from the analysis. Associations of fellowship training level with the ADR and PDR relative to attendings alone were assessed using unconditional multivariable logistic regression. Models were adjusted for sex, age, race, and colon preparationquality. RESULTS A total of 7503 colonoscopies met the inclusion criteria and were included in the analysis. The mean age of the study patients was 58.2 years; 63.1% were women and 88.2% were African American. The ADR was higher in the fellow participation group overall compared to that in the attending group: 34.5% vs 30.7%(P = 0.001), and for third year fellows it was 35.4% vs 30.7%(a OR = 1.23, 95%CI: 1.09-1.39). The higher ADR in the fellow participation group was evident for both the right and left side of the colon. For the PDR the corresponding figures were 44.5% vs 40.1%(P = 0.0003) and 45.7% vs 40.1%(a OR = 1.25, 95%CI: 1.12-1.41). The ADR and PDR increased with increasing fellow training level(P for trend < 0.05).CONCLUSION There is a stepwise increase in ADR and PDR across the years of gastroenterology training. Fellow participation is associated with higher adenoma and polyp detection. AIM To investigate whether the adenomas and polyp detection rates (ADR and PDR, respectively) in screening for the colonoscopies performed from the performing of fellows differ from those performed by attending physicians alone. METHODS We performed a retrospective review of all patients who underwent a screening colonoscopy at Grady Memorial Hospital between July 1, 2009 and June 30, 2015. Patients with a history of colon polyps or cancer and those with poor colon preparation or failed cecal intubation were excluded from the analysis. Associations of fellowship training level with the ADR and PDR relative to attendings alone were assessed using unconditional multivariable logistic regression. Models were adjusted for sex, age, race, and colon preparationquality. RESULTS A total of 7503 colonoscopies with the inclusion criteria and were included in the analysis. The mean age of the study patients was 58.2 63.1% were women and 88.2% were African American. The ADR was higher in the fellow participat ion group overall compared to that in the attending group: 34.5% vs 30.7% (P = 0.001), and for third year fellows it was 35.4% vs 30.7% (a OR = 1.23, 95% CI: 1.09-1.39) For the PDR the corresponding figures were 44.5% vs 40.1% (P = 0.0003) and 45.7% vs 40.1% (a OR = 1.25, 95 % CI: 1.12-1.41). The ADR and PDR increased with increasing fellow training level (P for trend <0.05) .CONCLUSION There is a stepwise increase in ADR and PDR across the years of gastroenterology training. Fellow participation is associated with higher adenoma and polyp detection.