Table 1. Performance indicators of image parameters, the mean red to blue (R/B) and red to green (R/G) intensity ratios, and the mean image hue and intensity values, used to discriminate between normal (n=28) and hyperplastic (n=10) oral tissue.

Image parameter	Area under ROC curve (±s.e.)	P-value	Cutoff value	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)
Mean R/B	0.9964 (±0.006)	<0.0001	>0.422	100	96	91	100
Mean R/G	0.9071 (±0.05)	0.0002	>2.435	100	75	59	100
Mean hue	1.0 (±0.0)	<0.0001	>183.5	100	100	100	100
Mean intensity	0.8286 (±0.07)	0.002	>41.56	100	64	50	100