TABLE 4.

Comparison of the sensitivity, specificity, positive predict value, negative predict value, and accuracy among four methods in patients with definite TBM.

Methods	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Accuracy (%)
Culture	8.33(1/12)	100(6/6)	100(1/1)	35.29(6/17)	38.89(7/18)
PCR	25(3/12)	100(6/6)	100(3/3)	40(6/15)	50(9/18)
1st AFB	33.33(4/12)	100(6/6)	100(4/4)	42.86(6/14)	55.56(10/18)
Acc AFB	66.67(8/12)	100(6/6)	100(8/8)	60(6/10)	77.78(14/18)
1st mNGS	66.67(8/12)	100(6/6)	100(8/8)	60(6/10)	77.78(14/18)

PPV, positive predict value; NPV, negative predict value; ^∗Acc, Accumulated test including the first and repeated analysis of CSF samples.