Table 4. Performance of smear-microscopy using Ziehl Neelsen and LED-fluorescence microscopy using two smear-positive case definitions.

	ZN		LED-FM		p
	Positive	Negative	Positive	Negative
One positive smear out of three smears
Positive culture	67	26	68	25
Negative culture	12	284	9	287
–Sensitivity, % [95%CI]	72.0 [61.8–81.6]		73.2 [62.9–81.8]		0.32
–Specificity, % [95%CI]	95.9 [93.0–97.9]		96.7 [94.3–98.6]		0.53
–Positive Likelihood ratio	17.8		24.0
–Negative Likelihood ratio	0.29		0.28

ZN: Ziehl Neelsen, LED-FM: Light Emitting Diode Fluorescence Microscopy.