Risk factors of progression to active tuberculosis in rheumatic patients
with latent tuberculosis: a retrospective study
Abstract
Background: The diminished immune response observed in individuals with
rheumatic diseases is a contributing factor to the occurrence of
tuberculosis (TB) infection. The primary objectives of this
investigation were to examine the risk factors associated with the
advancement of rheumatic diseases in conjunction with latent
tuberculosis infection (LTBI) leading to active tuberculosis (ATB).
Methods: A retrospective study was conducted at the Xijing Hospital of
the Fourth Military Medical University, utilizing the Laboratory
Information System (LIS), to investigate rheumatic diseases diagnosed
between January 2012 and October 2022. The collected data underwent
statistical analysis using the Social Science Statistical Package (SPSS)
version 26, with a significance level of p < 0.05 indicating
statistical significance. Results: The research conducted involved a
total of 33,020 individuals diagnosed with rheumatic conditions, of
which only 18.16% underwent screening for latent tuberculosis infection
(LTBI). Among the rheumatic patients, the incidence of LTBI was found to
be 25.33%, with 14.57% of these cases progressing to active
tuberculosis (ATB). Utilizing binary logistic regression analysis, it
was determined that exposure to glucocorticoids (GCs) at a dosage of 20
mg/d or higher was an independent risk factor for the development of ATB
[odds ratios (OR) = 3.59, 95% CI: 1.26-10.29, p = 0.017].
Conclusion: It is of the utmost importance to perform a screening for
LTBI prior to commencing treatment in patients with rheumatic
conditions, as they are at a significantly elevated risk of developing
ATB due to their exposure to medium-high doses of glucocorticoids (GCs).
Keywords: Latent tuberculosis infection; Active tuberculosis; Rheumatic
diseases; Risk factors