TABLE 1.

Performance of E-MTD, by specimen and by patient, after initial testing^a

Parameterb	E-MTD result	No. with MTBC culture result of:		Sensitivity (%)	Specificity (%)	PPV (%)c	NPV (%)d
		Positive	Negative
By specimen
Overall	Positive	28	12	77.8	98.8	70.0	99.2
	Negative	8	956
AFB+	Positive	13	2	100	77.8	86.7	100
	Negative	0	7
AFB−	Positive	15	10	65.2	99.0	60.0	99.2
	Negative	8	949
By patient
Overall	Positive	20	6	80.0	98.7	76.9	98.9
	Negative	5	458
AFB+	Positive	10	1	100	83.3	90.9	100
	Negative	0	5
AFB−	Positive	10	5	66.7	98.9	66.7	98.9
	Negative	5	453

^aBefore discrepancies were resolved. 

^bAFB⁺, positive smear for AFB; AFB⁻, negative smear for AFB. 

^cPPV, positive predictive value. 

^dNPV, negative predictive value.