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Table 3 Overall comparison of cold stain method with the Ziehl-Neelsen method

From: Comparative evaluation of a two-reagent cold stain method with Ziehl-Nelseen method for pulmonary tuberculosis diagnosis

ZN; no. (%)
Report Positive Negative Total
Positive CS 23(6.4) 0(0) 23(6.4)
Negative 1(0.3) 338(93.4) 339(93.6)
Total 24(6.6) 338(93.4) 362(100)
  1. ZN Ziehl-Neelsen, CS Cold stain; Positive = any positive (scanty, 1+, 2+ and 3+); Negative = no Acid fast bacilli per oil immersion in at least 100 fields; Sensitivity = 95.8%; Specificity = 100%; Positive predictive value =100%; Negative predictive value = 99.7%; Agreement = 99.7; Kappa (κ) = 0.98.