Table 1. Changes over time in numbers of certifications awarded by specialty.

Specialty	Gastroscopy			Flexible sigmoidoscopy			Colonoscopy (provisional)			Colonoscopy (full)
	N	Yearly gradient (95 % CI)	P value	N	Yearly Gradient (95 % CI)	P value	N	Yearly gradient (95 % CI)	P value	N	Yearly gradient (95 % CI)	P value
Gastroenterology	770	5 (–10, 20)	0.403	22	1 (0, 2)	0.103	555	14 (–1, 29)	0.059	305	13 (5, 20)	0.008
GS	330	12 (3, 20)	0.018	17	1 (0, 2)	0.117	383	11 (2, 19)	0.027	168	8 (5, 11)	0.002
NME	166	9 (4, 13)	0.007	148	11 (6, 15)	0.003	144	7 (5, 8)	< 0.001	64	5 (2, 7)	0.006
Overall	1312	27 (2, 51)	0.038	194	13 (8, 18)	0.002	1105	32 (9, 54)	0.017	546	26 (18, 34)	0.001

Results are based on linear regression models of the total number of certifications in each 12-month period. N represents the number of trainees awarded certification. Gradients represent the average annual increase in number of certifications awarded. The overall numbers included data from all certified specialties. P values are significant at P  < 0.05. GS, gastrointestinal surgery; NME, non-medical endoscopist