Table 3.

Comparative evaluation between groups

Parameters	Group A (without staining) (n1 = 100)	Group B (toludine blue staining) (n2 = 100)
True positive (a)	42	58
True negative (d)	25	32
False positive (b) [% = b/(b + d) × 100]	18 (41.86%)	7 (17.95%)
False negative (c) [% = c/(a + c) × 100]	15 (26.32%)	3 (4.92%)
Sensitivity [ a/(a + c) × 100]	73.68%	95.08%
Specificity [ d/(b + d) × 100]	58.14%	82.05%
Positive predictive value [a/(a + b) × 100]	70.00%	89.23%
Negative predictive value [d/(c + d) × 100]	62.50%	91.43%