The Distribution Frequency of Interferon-Gamma Receptor 1 Gene Polymorphisms in Interferon-γ Release Assay-Positive Patients

Table 1

n	P–N	T–N	Results	Result interpretation
≤400	Any value	≥14 and ≥N/4	Positive	Mycobacterium tuberculosis infection (tuberculosis activity stage infection, latent infection, or positive infection)
	≥20	<14	Negative	Uninfected Mycobacterium tuberculosis
	≥20	≥14 但 < N/4	Negative
	<20	<14	Not sure	It is not certain whether the Mycobacterium tuberculosis infection is infected
	<20	≥14 但 < N/4	Not sure
>400	Any value	Any value	Not sure