Table 2. Open in new tab MAE and Bias...

	Section-level	Video-level
MES	0.32	0.05	0.19	0.19
UCEIS	0.65	0.07	0.94	0.44
Vascular Pattern	0.20	−0.01	0.06	0.06
Bleeding	0.24	0.01	0.44	0.06
Erosions and Ulcers	0.36	0.10	0.50	0.12

	Section-level	Video-level
MES	0.32	0.05	0.19	0.19
UCEIS	0.65	0.07	0.94	0.44
Vascular Pattern	0.20	−0.01	0.06	0.06
Bleeding	0.24	0.01	0.44	0.06
Erosions and Ulcers	0.36	0.10	0.50	0.12

Table 2.

MAE and Bias measures of the SDA model

	Section-level		Video-level
	MAE	Bias	MAE	Bias
MES	0.32	0.05	0.19	0.19
UCEIS	0.65	0.07	0.94	0.44
Vascular Pattern	0.20	−0.01	0.06	0.06
Bleeding	0.24	0.01	0.44	0.06
Erosions and Ulcers	0.36	0.10	0.50	0.12

	Section-level		Video-level
	MAE	Bias	MAE	Bias
MES	0.32	0.05	0.19	0.19
UCEIS	0.65	0.07	0.94	0.44
Vascular Pattern	0.20	−0.01	0.06	0.06
Bleeding	0.24	0.01	0.44	0.06
Erosions and Ulcers	0.36	0.10	0.50	0.12

MES Scale [0–3]; UCEIS Scale [0–8]; Erosions and Ulcers [0–3], Vascular Pattern Scale [0–2]; Bleeding Scale [0–3]. We do not provide the results at frame-level because the ground truth is the score at section-level, projected down at frame-level to train the model. There is hence inherent error in the truth at frame-level that would be included in the performance results. MAE, mean absolute error; SDA, Disease Severity Assessment; MES, Mayo Endoscopic Subscore; UCEIS, Ulcerative Colitis Endoscopic Index of Severity.

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