TABLE 4.

The test results variable(s): rpoB PCR, IS6110 PCR, Nested PCR, Cloning-nested PCR.

Test result				Asymptotic 95% confidence interval
variable(s)	Area	Standard errora	Asymptotic Significanceb	Lower bound	Upper bound
rpoB PCR	0.600	0.083	0.309	0.436	0.764
IS6110 PCR	0.743	0.062	0.013	0.622	0.864
Nested PCR	0.929	0.028	0.000	0.873	0.984
Cloning-nested PCR	0.979	0.015	0.000	0.949	1.008

The PCR methods has at least one tie between the positive actual state group and the negative actual state group. Statistics may be biased.

^aUnder the non-parametric assumption.

^bNull hypothesis: true area = 0.5.