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Volume 8, Number 11—November 2002
THEME ISSUE
Tuberculosis Genotyping

Tuberculosis Genotyping Network, United States

Statewide Molecular Epidemiology of Mycobacterium tuberculosis Transmission in a Moderate- to Low-Incidence State: Are Contact Investigations Enough?

Wendy A. Cronin*Comments to Author , Jonathan E. Golub*, Monica J. Lathan†, Leonard N. Mukasa*, Nancy Hooper*, Jafar H. Razeq*, Nancy G. Baruch*, Donna Mulcahy‡, William H. Benjamin§, Laurence S. Magder¶, G. Thomas Strickland¶, and William R. Bishai#
Author affiliations: *Maryland Department of Health and Mental Hygiene, Baltimore, Maryland, USA; †American Public Health Association, Washington, D.C., USA; ‡Alabama Department of Public Health, Montgomery, Alabama, USA; §University of Alabama at Birmingham, Birmingham, Alabama, USA; ¶University of Maryland—Baltimore, Maryland, USA; #The Johns Hopkins University, Baltimore, Maryland, USA;

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Table 2

Selected characteristics of culture-positive patients with comparison between categories

No. patients with recent TB (%)
(N=115)
No. patients with probable
recent TB (%)
(n=82)
No. patients with reactivated TB (%)
(n=788)
p value
p value
Characteristic Group A Group B Group C A vs. B A vs. C
Residence
Baltimore City 57 (50.0) 38 (46.3) 157 (19.9) 0.66 <0.001
Other state jurisdictions 58 (50.0) 44 (53.7) 631 (80.1)
Age group (yrs)
0–14a 6 (5.2) 3 (3.7) 5 (0.6) <0.001 <0.001
15–24 21 (18.3) 7 (8.5) 86 (10.9)
25–44 46 (40.0) 27 (32.9) 275 (34.9)
45–64 33 (28.7) 20 (24.3) 178 (22.6)
>65 9 (7.8) 25 (30.4) 244 (31.0)
Race/ethnicity
White, non-Hispanic 20 (17.4) 17 (20.7) 162 (20.6) 0.03 <0.001
Black, non-Hispanic 89 (77.4) 51 (62.2) 341 (43.3)
Hispanic 1 (0.9) 5 (6.1) 84 (10.7)
Asian 5 (4.3) 9 (11.0) 200 (25.4)
Native American 0 0 1 (0.1)
Country of birth
United States 105 (91.3) 66 (80.5) 360 (45.7) 0.03 <0.001
Other 10 (8.7) 16 (19.5) 428 (54.3)
Long-term care resident
Yes 7 (6.1) 5 (3.3) 25 (3.2) 1.00 0.11
No 108 (93.9) 77 (96.7) 763 (96.8)
Homeless
Yes 18 (15.7) 8 (9.8) 23 (2.9) 0.22 <0.001
No 97 (84.3) 74 (90.2) 765 (97.1)
Prison resident
Yes 13 (11.3) 10 (13.1) 21 (2.7) 0.85 <0.001
No 102 (88.7) 72 (86.9) 767 (97.3)
Uses illegal drugs or abuses alcohol
Yes 53 (46.0) 30 (36.6) 76 (9.6) 0.18 <0.001
No 62 (54.0) 58 (63.4) 712 (90.4)
HIV-infected
Yes 28 (24.3) 19 (23.2) 75 (9.5) 0.85 <0.001
No
87 (75.7)
63 (76.8)
713 (90.5)


aIncludes one child < 6 years old without a known source patient; the case was classified as recent based on age.

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