A Retrospective Study on Clinical Characteristics and Outcomes of Patients With Pneumonia

Обзор

Retrospective Analysis of Clinical Characteristics and Prognostic Factors in Hospitalized Pneumonia Patients from April 2023 to April 2026. Background: Pneumonia remains the leading cause of death from infectious diseases in adults worldwide, with an increasingly severe disease burden exacerbated by population aging and the frequent emergence of drug-resistant bacteria; in China, severe pneumonia accounts for a striking 13.58% to 20.05% of hospitalized cases. In recent years, shifts in the pathogen spectrum (e.g., COVID-19, influenza A) and patient demographic characteristics have posed new challenges for clinical management. However, existing studies mostly focus on single pathogens or specific populations (e.g., ICU patients), lacking systematic analyses of the full-disease course characteristics of general hospitalized pneumonia patients. Furthermore, in the post-pandemic era, the clinical phenotypes, treatment responses, and prognostic factors of pneumonia may have evolved, necessitating evidence-based support from real-world data. This study aims to conduct a retrospective analysis to clarify the epidemiological characteristics, etiological distribution, and prognostic factors influencing current hospitalized pneumonia patients, thereby providing a basis for optimizing diagnosis and treatment strategies.

Первичные конечные точки

• 28-day all-cause mortality rate [Срок оценки: 28 days after admission]

Вторичные конечные точки (8)

• Demographic characteristics [Срок оценки: 28 days after admission]
• Comorbidities [Срок оценки: 28 days after admission]
• Symptomatic manifestations [Срок оценки: 28 days after admission]
• Laboratory tests [Срок оценки: 28 days after admission]
• Imaging Examination [Срок оценки: 28 days after admission]
• ICU Length of Stay [Срок оценки: 28 days after admission]
• Duration of Mechanical Ventilation [Срок оценки: 28 days after admission]
• Length of Hospital Stay [Срок оценки: 28 days after admission]

Критерии участия

Критерии включения

• Age ≥ 18 years old;
• Meet the diagnostic criteria for pneumonia (acute onset + new infiltrates on imaging);
• Have a positive result from pathogen testing;
• Time from onset to admission ≤ 72 hours (to ensure being in the acute phase of the disease);
• Sign a written informed consent form.

Inclusion criteria for the severe group:

A diagnosis of "severe pneumonia" can be made if one of the main criteria or ≥ 3 of the secondary criteria are met.

Main criteria:

① Tracheal intubation requiring mechanical ventilation

② Need for vasoactive drugs after active fluid resuscitation for septic shock

Secondary criteria:

• Respiratory rate ≥ 30 breaths/min

• PaO₂/FiO₂ ≤ 250 mm Hg

• Multiple lobe infiltrates

• Confusion and/or disorientation ⑤ Blood urea nitrogen ≥ 20 mg/dL

⑥ Leukopenia (WBC < 4×10⁹/L)

• Thrombocytopenia (PLT < 100×10⁹/L)

• Decreased body temperature (central body temperature < 36 ℃) ⑨ Hypotension requiring fluid resuscitation

Критерии исключения

• 1\) Patients with severely lacking medical records;

2\) Those whose main manifestations are other non-infectious diseases (such as pulmonary edema, lung cancer, pulmonary embolism, etc.); 3) Those whose main diagnosis is active pulmonary tuberculosis, non-infectious interstitial lung disease, etc.; 4) Patients considered not applicable by the researchers.

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Модель наблюдения

Когортное

Центры проведения

Китай · 1 центр

• Fifth Affiliated Hospital of Guangzhou Medical University — Гуанчжоу

Идентификаторы

NCT: NCT07574866 · P-2026-003

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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