Table 2.

Characteristics of Genotyped and Nongenotyped Tuberculosis Cases Reported to the Centers for Disease Control and Prevention, United States, 2006–2008^a,^b

	Genotyped TB Cases (Culture- positive)		Nongenotyped TB Cases
			Culture- positive		Clinicalc
	No.	%	No.	%	No.	%
Total	22,857		8,328		8,648
Sex
Male	14,410	63.0	5,080	61.0	4,973	57.5
Female	8,444	36.9	3,194	38.4	3,669	42.4
Unknown	3	0.0	54	0.6	6	0.1
Age group, years
0–14	469	2.1	189	2.3	1,701	19.7
15–24	2,829	12.4	839	10.1	881	10.2
25–44	7,868	34.4	2,760	33.1	2,592	30.0
45–64	7,017	30.7	2,543	30.5	2,429	28.1
≥65	4,674	20.4	1,997	24.0	1,044	12.1
Unknown	0	0.0	0	0.0	1	0.0
Race/ethnicity
Non-Hispanic white	3,845	16.8	1,491	17.9	1,394	16.1
Non-Hispanic black	5,779	25.3	2,317	27.8	2,389	27.6
Hispanic	6,487	28.4	2,385	28.6	2,813	32.5
Other	6,709	29.4	2,122	25.5	2,041	23.6
Unknown	37	0.2	13	0.2	11	0.1
US Census region
Northeast	3,789	16.6	1,697	20.4	1,780	20.6
Midwest	3,012	13.2	858	10.3	1,064	12.3
South	8,779	38.4	3,836	46.1	3,480	40.2
West	7,277	31.8	1,937	23.3	2,324	26.9
Birthplace
US-born	9,133	40.0	3,577	43.0	3,952	45.7
Foreign-born	13,724	60.0	4,751	57.0	4,696	54.3

Abbreviation: TB, tuberculosis.

^aAmong 39,920 total TB cases, 87 had unknown place of birth (42 genotyped cases, 32 culture-positive nongenotyped cases, and 13 clinical nongenotyped cases); these cases are not shown in the table.

^bComparison of genotyped cases with nongenotyped cases revealed that genotyped cases were more likely to be male, to reside in the western region of the United States, and to have been born outside of the United States; genotyped and nongenotyped cases also differed by age group and race/ethnicity (P < 0.001 for all χ² comparisons).

^cClinical cases are TB cases diagnosed using laboratory or provider verification in the absence of a culture result.