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Volume 26, Number 3—March 2020
Research

High Prevalence of and Risk Factors for Latent Tuberculosis Infection among Prisoners, Tianjin, China

Guoqin Zhang, Yuhua Zhang, Da Zhong, Sukai Meng, Liqun An, Wenliang Wei, Zhi Zhang, Yanyong Fu, and Xiexiu WangComments to Author 
Author affiliations: Tianjin Center for Tuberculosis Control, Tianjin, China (G. Zhang, Y. Zhang, D. Zhong, S. Meng, W. Wei, Z. Zhang, X. Wang); Tianjin Centers for Disease Control and Prevention Tianjin (L. An); Tianjin Third Central Hospital, Tianjin (Y. Fu)

Main Article

Table 2

Comparison of characteristics between IGRA-seropositive and IGRA-seronegative prisoners, Tianjin, China*

Characteristic No. (%) seropositive No. (%) seronegative Total p value by χ2 test
Age, y
<25 14 (2.8) 60 (13.0) 74 <0.01
25–34 197 (39.5) 226 (49.1) 423
35–44 168 (33.7) 119 (25.9) 287
>45
120 (24.0)
55 (12.0)
175

Ethnicity
Han 470 (94.2) 443 (96.3) 913 0.13
Other
29 (5.8)
17 (3.7)
46

Education level
Primary school 172 (34.5) 149 (32.4) 321 0.70
Middle school 233 (46.7) 216 (47) 449
High school
94 (18.8)
95 (20.7)
189

Residence
Local 220 (44.1) 213 (46.3) 433 0.49
Migrant
279 (55.9)
247 (53.7)
526

Employment
No 425 (85.2) 399 (86.7) 824 0.49
Yes
74 (14.8)
61 (13.3)
135

BMI†
Abnormal: >25–<18.5 147 (29.5) 137 (29.8) 284 0.91
Normal: 18.5–25.0
352 (70.5)
323 (70.2)
675

Contact history
No 415 (83.2) 388 (84.3) 803 0.62
Yes
84 (16.8)
72 (15.7)
156

Concurrent condition‡
No 403 (80.8) 395 (85.9) 798 0.03
Yes
96 (19.2)
65 (14.1)
161

Mycobacterium bovis BCG scar
No 180 (36.1) 206 (44.8) 385 <0.01
Yes
319 (63.9)
254 (55.2)
573

History of incarceration
No 315 (63.1) 368 (80.0) 683 <0.01
Yes
184 (36.9)
92 (20.0)
276

Current duration of incarceration, y
<3.9 227 (45.5) 236 (51.3) 463 0.07
>3.9
272 (54.5)
224 (48.7)
496

Facility-specific TB incidence, cases/100,000 persons§
Low 173 (34.7) 195 (42.4) 368 0.01
Medium 220 (44.1) 197 (42.8) 417
High 106 (21.2) 68 (14.8) 174

*BMI, body mass index; TB, tuberculosis.
†By World Health Organization standard (13).
‡Chronic diseases, including diabetes, silicosis, hypertension, kidney disease.
§The 2 low-incidence prisons reported 603.0 and 649.9 TB cases/100,000 persons, the 2 medium-incidence prisons 892.7 and 944.6 cases/100,000 persons, and the high-background prison 1,945.2 cases/100,000 persons.

Main Article

Page created: February 20, 2020
Page updated: February 20, 2020
Page reviewed: February 20, 2020
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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