The Application of GeneXpert MTB/RIF for Smear-Negative TB Diagnosis as a Fee-Paying Service at a South Asian General Hospital

Table 3

Number of patients detected as positive by GeneXpert using different inclusion criteria for testing.

Patients	Number of patients with information; (%)	Number of patients tested	Numbers of Xpert positive; (%)	Number needed to test	Numbers of patients not meeting the criteria	Xpert positive in group not meeting criteria; (%)
At least 2	251 (93.7)	232	50 (21.6)	4.6	19	3 (15.8)
At least 2 symptoms +	187 (72.5)	163	36 (22.1)	4.5	24	3 (12.5)
At least the 4 listed CXR abnormalities	187 (72.5)	152	38 (25.0)	4.0	35	1 (2.9)

7 patients had no available information of symptoms and were therefore excluded.
71 patients did not have information of CXR report and were therefore excluded.