Prevalence of Hyponatremia in Patients With Moderate to Severe Bronchiolitis

Objective: To estimate the frequency and severity of hyponatremia in infants hospitalized with moderate–severe bronchiolitis and to assess its association with the severity of disease and length of stay (LOS). Methodology: It was a single-centre cross-sectional study of consecutive infants with moderate–severe bronchiolitis conducted at Pediatric Medicine Department, Federal Government Polyclinic (FGPC) Hospital, Islamabad, from 01-11-2023 to 30-04-2024. Patients were selected by clinical diagnosis using Pediatric Respiratory Severity Score (PRESS) at presentation. Serum sodium was measured and hyponatremia categorized by standard thresholds. Associations with clinical severity and LOS were tested with chi-square and correlation analyses. Multivariable logistic regression was applied to adjust for confounding variables like age and gender. SPSS version 27 was used for analysis and a P