Assessment of Inflammatory Markers (CBC and CRP) and their Impact on Severity and Recurrence of Pneumonia in Under-Five Children

Background: Pneumonia remains a leading cause of morbidity and mortality in children under five. This study evaluates the association between inflammatory markers complete blood count (CBC) parameters and C-reactive protein (CRP) levels and pneumonia severity and recurrence. Methods: A prospective study was conducted with 110 children diagnosed with pneumonia at Dr. Sirajul Islam Medical College & Hospital and Islami Bank Hospital, Motijheel, Dhaka, from January to December 2023. Clinical assessments included demographic data, pneumonia severity classification, and inflammatory marker measurements. Results: The study population comprised 62 males (56.4%) and 48 females (43.6%), with a mean age of 24.6 months. Inflammatory marker analysis revealed significant differences in WBC count, neutrophil percentage, lymphocyte percentage, and CRP levels across mild, moderate, and severe pneumonia groups (p < 0.001). Higher levels of WBC count (14,500 ± 3,500), neutrophils (72.2 ± 8.6%), and CRP (38.5 ± 11.2) were observed in patients with pneumonia recurrence compared to those without recurrence. Multivariate regression analysis identified WBC count, neutrophil count, and CRP levels as significant predictors of pneumonia recurrence. Conclusion: Elevated inflammatory markers, particularly CBC parameters and CRP levels, correlate with increased severity and recurrence of pneumonia in young children. Monitoring these markers can aid in early identification and management of at-risk pediatric patients, potentially improving clinical outcomes. Further research is needed to explore additional biomarkers and their implications in pediatric pneumonia management.