Table 1. Characteristics of patients diagnosed with pulmonary tuberculosis and their asymptomatic household contacts.

	Active TB Disease (n = 17)	Household Contacts (n = 16)	P-valuec
Age [years; median (IQR)]a	27 (24–42)	35 (29–48)	0.05
Male sex, n (%)	10 (59%)	6 (38%)	0.22
Tobacco use	13 (76%)	6 (38%)	0.02
High grade AFB sputum smeara	1 (6%)	N/A	N/A
>100 Colonies on semi-quantitative culture	7 (41%)	N/A	N/A
Cavitation on chest radiograph	2 (12%)	N/A	N/A
Multidrug-resistant TBb	3 (18%)	N/A	N/A

IQR, interquartile range; AFB, acid-fast bacilli; TB, tuberculosis.

a. Sputum smear and culture obtained at study enrollment; high grade smear defined as > 1 AFB per high power field

b. Multidrug resistance was defined as resistance to both isoniazid and rifampin by drug susceptibility testing

c. A Wilcoxon rank sum test was used for comparisons of continuous data and a two-tailed Fisher exact test was used for categorical data