Association of trainee participation with adenoma and polyp detection rates

Table 3 Advanced adenomas and total adenomas per colon found during screening colonoscopies by gastroenterology attendings alone and fellows in their first 6 mo of training; Grady Memorial Hospital, Atlanta, Georgia, July 1, 2009 – July 1, 2015

	Attending alone n = 2464 n (%)	Fellows 1st 6 mo n = 627 n (%)	P value1
≥ 1 advanced adenoma (AADR)	215 (8.7)	30 (4.8)	0.001
≥ 1 adenoma ≥ 1 cm	194 (7.9)	21 (3.4)	< 0.0001
≥ 1 adenoma with villous histology	83 (3.4)	14 (2.2)	0.15
≥ 1 adenoma with HGD and/or cancer	26 (1.1)	4 (0.6)	0.34
Mean number of APC	0.61	0.64	0.54

¹P value from χ² test for categorical variables, and student t test for continuous variables. AADR: Advanced adenoma detection rate; HGD: High-grade dysplasia. APC: Adenomas per colon.