Antral exfoliative cytology for the detection of Helicobacter pylori in the stomach

Table 1 Comparison of the results from the exfoliative cytology method against those obtained from the combined histology and urease test.

Exfoliative cytology	Histology and urease both positive	Histology and urease both negative
Positive	n = 28	n = 6
Negative	n = 3	n = 12

n = number of patients. Accuracy: 81.6% = (28+12/28+3+6+12); Sensitivity: 90.3% = (28/28+3); Specificity: 66.6% = (12/12+6); PPV: 82.3% = (28/28+6); NPV: 80.0% = (12/12+3); PPV: positive predictive value; NPV: negative predictive value.