Table 3.

Proportions of negative cases (conversion rates) after different durations of treatment according to HIV status

Type of test	Duration of treatment (weeks)	HIV positive % (n/N)	HIV negative % (n/N)	P value
Zeihl Neelsen smear
	2	72.8(107/147)	63.3(197/311)	0.0457
	8	98.6(139/141)	97.0(295/304)	0.52
	12	99.3(140/141)	98.0(298/304)	0.56
	20	99.3(140/141)	99.0(301/304)	0.80
Fluorescence	2	72.8(107/147)	63.2(196/310)	0.0433
	8	98.6(139/141)	97.0(294/303)	0.51
	12	99.3(140/141)	98.0(297/303)	0.55
	20	99.3(140/141)	99.0(300/303)	0.80
Culture	2	59.4(85/143)	51.8(156/301)	0.13
	8	95.7(134/140)	92.5(272/294)	0.21
	12	98.6(137/139)	97.3(285/293)	0.62
	20	100(138/138)	98.6(289/293)	0.40