Colonoscopy procedural volume increases adenoma and polyp detection rates in gastroenterologytrainees

Table 1 Characteristics of screening colonoscopies performed by 12 gastroenterology fellows throughout their 3 years of clinical training (n = 3123), and 8 attendings alone (n = 2174), July 1 2009 to June 30 2014

Fellow	Number of screening colonoscopies	Total colonoscopy procedure volume	Patient’s mean age (yr)	Male patients (%)	Black patients (%)	Adequate exam (%)	Mean ADR (%)	Mean PDR (%)	Mean advanced ADR (%)
A	326	751	58.5	39.4	86.3	90.5	31.0	38.1	6.9
B	277	702	58.2	36.3	83.1	91.9	28.4	34.9	9.1
C	282	680	57.8	39.1	88.7	90.8	28.8	42.4	6.7
D	328	668	58.4	35.4	87.1	92.8	31.2	37.5	10.7
E	214	566	57.8	35.4	89.2	92.6	35.7	53.8	8.9
F	275	546	57.9	37.7	86.1	93.1	32.7	47.8	6.7
G	254	561	58.4	41.2	87.7	85.3	21.6	32.5	8.6
H	226	689	58.0	35.9	90.4	81.1	31.5	41.2	6.5
I	229	600	57.0	37.9	85.2	89.4	34.6	41.8	7.5
J	206	586	58.0	35.2	90.8	91.7	28.2	36.5	4.8
K	244	549	58.2	36.5	84.0	91.8	34.5	44.8	5.7
L	261	569	58.6	35.7	90.5	91.7	39.8	51.5	12.0
All fellows	3123	7467	58.1	37.2	87.3	89.8	31.5	41.9	7.8
Attendings alone	2174		57.9	36.3	89.3	90.1	28.9	38.2	8.5

Adequate colonoscopies were those in which the cecum was reached and the preparation quality was either good or fair-adequate. ADR: Adenoma detection rate; PDR: Polyp detection rate.