Nishio 2006.

Methods	A novel grading system was developed for use when high‐resolution video‐magnifying colonoscopy is performed
Data	113 patients with UC
Comparisons	Riley Score (histologic) Mucosal interluekin‐8 activity (inflammatory cytokine activity measured as picograms per microgram)
Outcomes	Criterion validity, construct validity (see Table 4 and Table 5)
Notes	Endoscopic scoring index evaluated: Magnifying Colonoscopy Grade Spearman's rank correlation coefficient value not given (only P value)
Risk of bias
Item	Authors' judgement	Description
Blinding?	Yes	Pathologist was blinded to clinical data
Independent Observation?	Unclear	Not relevant (construct validity)