Table 1. Sensitivity and specificity for detection of TB in slides prepared from sputum samples from TB suspects.

	ZN	Routine FM	iLED	Fraen AFTER	Lumin
Sensitivity in culture positive sputa (%; 95% CI)	33/53 (62.3%; 47.9–75.2)	29/53 (54.7%; 40.4–68.4)	37/53 (69.8%; 55.7–81.7)	38/53 (71.7%; 57.7–83.2)	36/53 (67.9%; 53.7–80.1)
Very low positive (scanty)	2	-	6	6	7
Low positive (1+)	8	-	9	10	8
High positive (2+, 3+)	23	-	22	22	21
Specificity in culture negative sputa (%; 95% CI)	125/127 (98.4%; 94.4–99.8)	127/127 (100%; 97.1–100.0)*	126/127 (99.2%; 95.7–100.0)	121/127 (95.3%; 90.0–98.2)	126/127 (99.2%; 95.7–100.0)

*one-sided, 97.5% confidence interval.

A different grading scheme was used for routine FM and hence grading results were excluded from analysis.