Abstract
This study aims to investigate the clinical characteristics of infections following induction chemotherapy for acute myeloid leukemia (AML) in children and identify risk factors associated with severe infections. Newly diagnosed children with AML treated at the Hematology Oncology Center of Beijing Children's Hospital affiliated to Capital Medical University (referred to as the "Beijing ward") and Baoding Hospital of Beijing Children's Hospital (referred to as the "Baoding ward") between November 2019 and August 2022 were enrolled. The diagnosis and treatment of the patients were carried out in accordance with the CCLG-AML 2019 protocol. Their essential information and infection-related indicators were collected. The various indicators between the two centers were compared. The incidence of infection in children with AML was 100%, with a severe infection rate of 15.3% and an infection-related mortality rate of 2.4%. Respiratory infections accounted for 39.7% of all infections events, and unspecified site infection for 32.2%. Bacterial infections were predominant at 51.2%. The bed unit area (BUA) varied significantly with 4.1 m2 in the Beijing ward and 10 m2 in the Baoding ward. Significant differences were observed in gastrointestinal infections (P < 0.001) and severe infections (P = 0.014) between the two wards. Several factors were identified as risk factors for severe infections, including BUA difference (OR = 4.353, 95% CI: 1.078-17.578), time of entering neutropenia phase after chemotherapy (OR = 6.369, 95% CI: 1.713-23.675) and bloodstream infection (OR = 7.466, 95% CI: 1.889-29.507). Respiratory tract infections and infections of unspecified site are most common during induction phase for pediatric AML. Bacteria, especially G- bacteria, are the leading pathogens. Risk factors for severe infections include a small BUA, entering neutropenia phase ≤ 5.5days after chemotherapy, and bloodstream infection. Recognizing these risk factors can aid in the early identification and intervention of severe infections.
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