Table 3. Paired mean key performance indicator data for trainees in the 3 months pre- and post-lower GI certification period, with comparisons performed using Wilcoxon signed rank tests.

Lower gastrointestinal endoscopy certification		Mean CIR			Mean PDR
Sigmoidoscopy	N	Pre	Post	P value	Pre	Post	P value
Gastroenterologist	8				20.3 %	20.0 %	0.345
GS	7				18.8 %	12.5 %	0.028
NME	92				12.2 %	12.0 %	0.463
Overall	110				12.6 %	12.0 %	0.674
Colonoscopy (provisional)	N	Pre	Post	P value	Pre	Post	P value
Gastroenterologist	382	95.4 %	94.2 %	0.001	22.9 %	22.7 %	0.871
GS	234	95.1 %	93.4 %	0.008	23.6 %	22.1 %	0.109
NME	115	94.6 %	93.1 %	0.004	20.2 %	22.4 %	0.010
Overall	749	95.2 %	93.8 %	< 0.001	22.7 %	22.5 %	0.979
Colonoscopy (full)	N	Pre	Post	P value	Pre	Post	P value
Gastroenterologist	173	94.9 %	94.4 %	0.492	25.6 %	25.4 %	0.759
GS	92	94.9 %	94.4 %	0.409	24.3 %	20.9 %	0.007
NME	32	93.5 %	94.8 %	0.984	27.9 %	25.9 %	0.421
Overall	301	94.9 %	94.4 %	0.315	25.6 %	24.4 %	0.075

Trainees with < 10 procedures in the 3 months post-certification period were excluded. The overall numbers include data from all certified specialties. CIR, cecal intubation rate – unadjusted, intention to treat; PDR, polyp detection rate; GS: trainee Surgeon, NME: non-medical endoscopists trainee.