Background: The activation of the cell-mediated immune responses by Mycobacterium tuberculosis can promote atherogenesis.
Aims: The aim of this study is to determine the frequency of latent tuberculosis infection (LTBI) among patients with coronary artery stenosis (CAS) and to explore the association between LTBI and development of CAS. We conducted a case-control study which included 183 patients' who underwent percutaneous coronary angiography (121 patients with CAS and 62 patients without as a control group).
Methods: For all the study population, clinical evaluation, tuberculin skin test (TST), imaging studies (including chest radiography and echocardiography), laboratory investigations, and electrocardiography were carried out. Only for the patients with positive TST, QuantiFERON-TB Gold test was performed. Predictors of CAS were identified using univariate analyses (Yates' corrected Chi-square test or Fischer's exact test) followed by multivariate analysis (binary logistic regression).
Results: Among 29.5% of the study population, LTBI was detected, and among patients with CAS, 56.2% of patients had advanced CAS. After multivariate analysis, it was found that metabolic syndrome (MS) (odds ratio [OR] 3.6, 95% confidence interval [CI] 1.5-22.6, P = 0.022) and LTBI (OR 2.5, 95% CI 1.2-17.3, P = 0.018) were the predictors of CAS among the study population, while only diabetes mellitus (DM) (OR 1.9, 95% CI 1.1-11.7, P = 0.031) was the predictor of advanced CAS.
Conclusion: LTBI is associated with the development of CAS. In addition, MS is associated with CAS, while its related disorder, DM, is associated with advanced CAS.
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