Table 3.

Reliability estimates (G-coefficients) of formative gastroscopy DOPS based on 1–6 trainers each observing 1–20 assessments

Trainers	Observations per trainer
	1	2	3	4	5	10	15	20
1	0.31	0.40	0.44	0.46	0.47	0.51	0.52	0.53
2	0.47	0.57	0.61	0.63	0.64	0.67	0.68	0.69
3	0.57	0.66	0.70	0.72	0.73	0.75	0.76	0.77
4	0.64	0.72	0.76	0.77	0.78	0.80	0.81	0.82
5	0.69	0.77	0.79	0.81	0.82	0.84	0.84	0.85
6	0.73	0.80	0.82	0.84	0.84	0.86	0.87	0.87

G-coefficients of 0.70 + based on assessor and assessment combinations (indicating sufficient reliability for in-training assessment) are shown in bold