Table 3.

Validation of derived R/G ratios with visual score and pathology

R/G ratio
κ(P)
≥0.54<0.54
Visual score by expert (n = 70 sites)
    Positive (score 1; class 3/suspicious)2910.66 (P < 0.0001)
    Negative (score 2; class 1/normal and 2/abnormal)1129
Pathology (n = 70 specimens)
    Positive (HGD and moderate dysplasia)282 (moderate dysplasia)0.61 (P < 0.0001*)
    Negative (LGD)12 (1 normal, 2 inflammation, 5 squamous metaplasia, and 4 mild dysplasia)28