STUDING LATE-ONSET HYPOCALECIMEIA IN FORMULA-FED NEONATES

Abstract

Late-onset hypocalcemia in formula-fed neonates presents a critical clinical concern with complex, multifactorial underpinnings. This study investigates the epidemiological profile, biochemical markers, risk factors, and management approaches associated with the condition in a cohort of 100 neonates from multiple NICUs. The analysis revealed that the majority of affected neonates were born near-term with a mean gestational age of 36 weeks and birth weights averaging 2.8 kg, suggesting that late preterm birth and low birth weight contribute significantly to vulnerability. Biochemically, 40% of neonates had serum calcium levels below 4.0 mg/dL, while elevated serum phosphorus and low vitamin D levels were common, pointing to dietary and metabolic contributors. Parathyroid hormone (PTH) levels were markedly elevated in a subset of cases, indicating secondary hyperparathyroidism. Notably, neonates with symptomatic presentations such as seizures or tetany were those with critically low calcium levels (<3.5 mg/dL). The prevalence of hypocalcemia was significantly higher among infants born to diabetic mothers, reinforcing the role of maternal metabolic status. Graphical analyses supported these findings, with skewed calcium distributions, increased symptomatology in severely hypocalcemic neonates, and notable associations with maternal diabetes. These insights affirm that late-onset hypocalcemia in formula-fed infants is influenced by nutritional, hormonal, genetic, and perinatal factors. The study advocates for enhanced clinical vigilance, early screening protocols, and tailored nutritional interventions, including calcium and vitamin D supplementation. It also emphasizes the necessity for maternal health optimization and genetic screening in persistent or recurrent cases. These findings provide a data-driven foundation for refining NICU protocols and improving long-term neonatal outcomes through multidisciplinary approaches.