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1
The study compares clinical characteristics, imaging, diagnostic delays, microbiological test positivity, and respiratory co-detection patterns in non-HIV immunocompromised and non-immunocompromised patients with pulmonary tuberculosis.
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2
This retrospective study includes inpatients at China-Japan Friendship Hospital in Beijing from January 1, 2020, through June 30, 2025.
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3
All included patients have liquid culture-confirmed pulmonary tuberculosis, with Mycobacterium tuberculosis detected using the BACTEC MGIT 960 system.
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4
Immunocompromised status is defined by specified immunosuppressive treatment, organ or hematopoietic stem cell transplantation, solid tumor with chemotherapy within 5 years, hematological malignancy, or primary immunodeficiency.
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5
Health system delay is the interval from first medical contact to the earliest positive respiratory microbiological result. More than 14 days defines long health system delay.
