Table 1.

Characteristics of the patients with active TB (group A), of the close contacts with latent TB infection (group B), of the close contacts without latent TB infection (group C), and of the control subjects (group D)

Group (N)	Age (ys) Mean ± SD	SEX M/F	QUANTIFERON Positive/Negative
A [22]	43 ± 3	19/3	18/4
B [15]	43 ± 5	12/3	15/0
C [17]	35 ± 3	9/8	0/17
D [10]	35 ± 6	5/5	0/10