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  • Title: Vitamin D Deficiency and Parathyroid Response in Critically-ill Children: Association with Illness Severity and Clinical Outcomes.
    Author: Shah SK, Kabra SK, Gupta N, Pai G, Lodha R.
    Journal: Indian Pediatr; 2016 Jun 08; 53(6):479-84. PubMed ID: 27376601.
    Abstract:
    OBJECTIVE: To determine the prevalence of vitamin D deficiency in critically ill children, and to study its association with parathyroid response, severity of illness and clinical outcomes. DESIGN: Prospective observational study. SETTING: Medical Pediatric Intensive Care Unit of a tertiary care centre of Northern India. PARTICIPANTS: 154 children in-patients: August 2011-January 2013. MAIN OUTCOME MEASURES: Vitamin D deficient children were (serum 25-hydroxy vitamin D <20 ug/mL) divided into parathyroid-responder [serum parathyroid hormone >65 pg/mL with 25(OH)D<20 ug/mL and/or calcium corrected for albumin <8.5 mg/dL] and non parathyroid-responder. Illness severity was assessed by Pediatric Index of Mortality-2 (PIM-2) score at admission. Biochemical parameters, illness severity scores and clinical outcomes were compared between parathyroid-responders and non-parathyroid-responders. RESULTS: Vitamin D deficiency and hypocalcemia were observed in 125 (83.1%) and 91 (59%) children, respectively at admission. There were no differences in illness severity score at admission, mortality rate and length of stay between vitamin D-deficient children and 19.8% of non-vitamin D-deficient children. Among Vitamin D-deficient children, parathyroid-responders had higher PIM-2 score at admission compared to non-parathyroid-responder [12.8 (7.4,20.6) vs. 6.5 (2.5,12.2), P=0.01]. However, there were no differences in other clinical outcomes between two groups. CONCLUSION: Critically ill children have high prevalence of vitamin D deficiency. Parathyroid gland response secondary to hypocalcemia or vitamin D defiency is impaired in critical illness.
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