Table 1. Demographic and clinical characteristics of participants.

	Patients	Controls	p-value
Number of subjects participating in analysis	21	24
Mean age in years	43	20
Median age	45	20	<0.001
Minimum age	21	17
Maximum age	80	25
Sex: Male	8 (38.1)	23 (95.8)	<0.001
Race/Ethnicity - Number (percentage)
White non-Hispanic	1 (4.8)	16 (66.7)	<0.001
Black non-Hispanic	5 (23.8)	5 (20.8)
Asian, Pacific Islander, or Native American	5 (23.8)	1 (4.2)
Hispanic	10(47.6)	2 (8.3)
Born in a country with indicated TB burden - Number (percentage)
<20 cases per 100,000 population	8 (38.1)	24 (100)	<0.001
20 to 100 cases per 100,000 population	5 (23.8)	0 (0)
>100 cases per 100,000 population	8 (38.1)	0 (0)
Resided in a country with indicated TB burden (other than birth) - Number (Percentage)
<20 cases per 100,000 population	18 (85.7)	24 (100)	<0.16
20 to 100 cases per 100,000 population	2 (9.5)	0 (0)
>100 cases per 100,000 population	1 (4.8)	0 (0)
Employed or stayed in a health care facility for >1 month- Number (Percentage)	4 (19.0)	0 (0)	0.04
Employed or stayed in a correctional facility for >1 month- Number (Percentage)	5 (23.8)	0 (0)	0.02
History of BCG vaccination- Number (Percentage)
None	9 (42.9)	24 (100)	<0.001
Unknown	3 (9.5)	0 (0)
Vaccinated	10 (47.6)	0 (0)

Characteristics are listed for 21 patients with culture-confirmed tuberculosis (patients) and 24 subjects at low-risk for M. tuberculosis (Mtb)exposure (controls) who provided samples that were tested in this study. Samples from 5 patients and 6 controls were tested with more than one multiplexed immunoassay. Percentages of the patients or controls in the different categories are indicated in parentheses. The Mann-Whitney U test was used to compare age. Other p values were calculated by the Chi-squared test or, when an expected frequency was five or less, a Fisher's Exact test.