Journal
INTERNATIONAL JOURNAL OF TUBERCULOSIS AND LUNG DISEASE
Volume 20, Issue 1, Pages 71-U123Publisher
INT UNION AGAINST TUBERCULOSIS LUNG DISEASE (I U A T L D)
DOI: 10.5588/ijtld.15.0457
Keywords
hemoglobin A1c; QuantiFERON test; refugee; vitamin D
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Funding
- National Institute of Health (NIH), National Institute of Allergy and Infectious Diseases, Bethesda, MD [K23AI1030344]
- Atlanta Clinical and Translational Science Institute, Atlanta, GA, USA [NIH/NCATS UL1TR000454]
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SETTING: Although diabetes mellitus (DM) is an established risk factor for active tuberculosis (TB) disease, little is known about the association between pre-DM, DM, and latent tuberculous infection (LTBI). OBJECTIVE: To estimate the association between DM and LTBI. DESIGN: We conducted a cross-sectional study among recently arrived refugees seen at a health clinic in Atlanta, GA, USA, between 2013 and 2014. Patients were screened for DM using glycosylated-hemoglobin (HbA1c), and for LTBI using the QuantiFERON-TB (QFT) test. HbA1c and QFT results, demographic information, and medical history were abstracted from patient charts. RESULTS: Among 702 included patients, 681 (97.0%) had HbA1c and QFT results. Overall, 54 (7.8%) patients had DM and 235 (33.8%) had pre-DM. LTBI was prevalent in 31.3% of the refugees. LTBI prevalence was significantly higher (P < 0.01) among patients with DM (43.4%) and pre-DM (39.1%) than in those without DM (25.9%). Refugees with DM (adjusted OR [aOR] 2.3, 95%CI 1.2-4.5) and pre-DM (aOR 1.7, 95%CI 1.1-2.4) were more likely to have LTBI than those without DM. CONCLUSION: Refugees with DM or pre-DM from high TB burden countries were more likely to have LTBI than those without DM. Dysglycemia may impair the immune defenses involved in preventing Mycobacterium tuberculosis infection.
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