Table 2.

Intra-reader agreement [κ] for UCEIS items in blinded and unblinded groups.

Descriptor	Blinded readers [n = 20] [95% CI]	Unblinded readers [n = 20] [95% CI]	p-value for difference between κ
Vascular pattern [0–2]	0.57 [0.34, 0.80]	0.62 [0.41, 0.84]	0.72
Bleeding [0–3]	0.68 [0.49, 0.87]	0.47 [0.25, 0.69]	0.15
Erosions and ulcers [0–3]	0.47 [0.26, 0.68]	0.74 [0.57, 0.91]	0.047
UCEIS [0–8] +	0.51 [0.36, 0.66]	0.56 [0.42, 0.69]	0.66

A total of 80 repeat-pair evaluations assessed intra-reader variability [160 evaluations in total]. κ: < 0.00, ‘poor’ agreement; 0.00–0.20, ‘slight’ agreement; 0.21–0.40, ‘fair’ agreement; 0.41–0.60, ‘moderate’ agreement; 0.61–0.80, ‘substantial’ agreement; 0.81–1.00, ‘almost perfect’ agreement.¹³ + Weighted kappa [weight of 1 for perfect agreement; 0.5 for difference in level of 1; and 0 otherwise].