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Chinese Journal of Antituberculosis ›› 2024, Vol. 46 ›› Issue (1): 29-39.doi: 10.19982/j.issn.1000-6621.20230207

• Original Articles • Previous Articles     Next Articles

Latent tuberculosis infection rate and risk factors in patients with rheumatic diseases: a multi-center, cross-sectional study

Zhang Lifan1,2,3, Ma Yanan1, Zou Xiaoqing1,4, Zhang Yueqiu1, Zhang Fengchun5, Zeng Xiaofeng5, Zhao Yan5, Liu Shengyun6, Zuo Xiaoxia7, Wu Huaxiang8, Wu Lijun9, Li Hongbin10, Zhang Zhiyi11, Chen Sheng12, Zhu Ping13, Zhang Miaojia14, Qi Wencheng15, Liu Yi16, Liu Huaxiang17, Shi Xiaochun1,3(), Liu Xiaoqing1,2,3(), the Epidemiological Study and Therapeutic Evaluation of Rheumatic Patients with Tuberculosis Study Team   

  1. 1Division of Infectious Diseases, Department of Internal Medicine, State Key Laboratory of Complex Severe and Rare Disease, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
    2Clinical Epidemiology Unit, International Epidemiology Network, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
    3Centre for Tuberculosis Research, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
    4School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
    5Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, National Clinical Research Center for Dermatologic and Immunologic Diseases, State Key Laboratory of Complex Severe and Rare Disease, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing 100730, China
    6Department of Rheumatology and Immunology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
    7Department of Rheumatology and Immunology, Xiangya Hospital, Central South University, Changsha 410008, China
    8Department of Rheumatology, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
    9Department of Rheumatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
    10 Department of Rheumatology and Immunology, The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010000, China
    11 Department of Rheumatology and Immunology, The First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
    12 Department of Rheumatology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200001, China
    13 Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi’an 710032, China
    14 Department of Rheumatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
    15 Department of Rheumatology, Tianjin First Central Hospital, Tianjin 300192, China
    16 Department of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu 610041, China
    17 Department of Rheumatology, Qilu Hospital of Shandong University, Ji’nan 250012, China
  • Received:2023-06-16 Online:2024-01-10 Published:2024-01-04
  • Contact: Shi Xiaochun, Email: shixch7722@163.com;Liu Xiaoqing, Email: liuxq@pumch.cn
  • Supported by:
    Central High Level Hospital Clinical Research Project(2022-PUMCH-C-013);National Major Science and Technology Special Project for the 13th Five Year Plan(2017ZX10201302);National Science and Technology Major Special Project for the 12th Five Year Plan(2014ZX10003003)

Abstract:

Objective: This study aimed to screen latent tuberculosis infection (LTBI) among patients with rheumatic diseases in China using the T-SPOT.TB assay and investigate factors affecting the results of T-SPOT.TB. Methods: Rheumatic diseases patients (n=3715) were enrolled from 13 tertiary hospitals in Eastern, Middle, and Western China from September 2014 to March 2016 and were screened by the T-SPOT.TB assay to detect LTBI. Basic information about the subjects were collected, including gender, age, region, body mass index, course of disease, smoking history, underlying disease, close contact history of tuberculosis patients, evidence of previous tuberculosis, the use of glucocorticoids, immunosuppressants and biologics, laboratory tests, and diagnosis of rheumatic disease, etc. Univariate analysis and multivariable logistic regression were performed to identify factors affecting the results of T-SPOT.TB. Results: out Of the 3715 patients, 672 were positive in T-SPOT.TB, the positive rate was 18.1% (95%CI: 16.9%-19.3%). There was a statistically significant difference in the positive rate of T-SPOT.TB test among patients with different types of rheumatic immune diseases (χ2=79.003, P<0.001), patients with Behcet’s syndrome had the highest positive rate (44.4%, 32/72), while patients with mixed connective tissue disease had the lowest positive rate (8.9%, 4/45). The positive rate of T-SPOT.TB test in male patients with rheumatic immune disease was 23.6% (168/711), which was significantly higher than that in females (16.8%, 504/3004, χ2=18.213, P<0.001). There was a statistically significant difference in the positive rate of T-SPOT.TB test among patients with rheumatic immune disease in different age groups (χ2=67.189, P<0.001), the 51-60 years old group had the highest positive rate (24.8%, 143/577), while the 16-20 years old group had the lowest positive rate (8.1%, 13/160). Multivariate logistic regression analysis showed that age≥41 years (aOR=1.81, 95%CI: 1.48-2.23), smoking ≥21 cigarettes/d (aOR=1.66, 95%CI: 1.15-2.40), previous history of tuberculosis (aOR=3.88, 95%CI: 2.71-5.57), and Behcet’s syndrome (aOR=3.00, 95%CI: 1.70-5.28) were independent related factors of T-SPOT.TB positive results; using high-dose hormones (aOR=0.67, 95%CI: 0.47-0.96) or biological agents (aOR=0.55, 95%CI: 0.36-0.84), low lymphocyte count (aOR=0.39, 95%CI: 0.25-0.62), hypoalbuminemia (aOR=0.72, 95%CI: 0.52-0.99), and multiple myositis/dermatomyositis (aOR=0.54, 95%CI: 0.29-0.99), systemic lupus erythematosus (aOR=0.75, 95%CI: 0.57-0.99) were independent correlation factors for negative T-SPOT.TB test results. Conclusion: Among patients with rheumatic diseases, the overall prevalence of LTBI is 18.1%. There is a significant difference in the positive rate of T-SPOT.TB test among different diseases. When patients are treated with high-dose glucocorticoids or biologics, have low lymphocyte counts, hypoalbuminemia, or suffer from systemic lupus erythematosus, more attention should be paid to potential false-negative results.

Key words: Rheumatic diseases, Mycobacterium tuberculosis, Infection, Immunologic techniques, Cross-sectional studies

CLC Number: