Pediatric anesthesia & critical care

Hypophosphatemia as a biomarker of metabolic intolerance to enhanced nutrition in the pediatric intensive care unit (PICU): a secondary analysis of the PEPaNIC RCT

Crit CarePublished Secondary analysis of the PEPaNIC randomised trial

Authors' conclusion

Development of hypophosphatemia may identify critically ill children who are particularly harmed by early-PN.

Study context

Population
Critically ill children in the PICU
Participants
1,440 children
Comparison
Early-PN vs late-PN in children with vs without early hypophosphatemia
Primary endpoint
Incidence of new infections and duration of PICU dependency (interaction of hypophosphatemia with randomized intervention)
Methodological detailsadjusted for baseline risk factors, with and without imputation of missing phosphate data
  • Adjusted for baseline risk factors
  • With and without imputation of missing phosphate data

Primary result

As reported in the abstract

Interaction of hypophosphatemia with randomization · PICU day 1 and day 2
Day 2 hypophosphatemia × randomization: risk of new infection (interaction P)
P = 0.031
Day 2 hypophosphatemia × randomization: likelihood of earlier live PICU discharge (interaction P)
P = 0.030

Secondary outcomes

Hypophosphatemia incidence (patients with available phosphate) · Day 1 and day 2

Day 1 hypophosphatemia
19.9% (211/1060)
Day 2 hypophosphatemia
27.5% (243/883)

Time to live weaning from mechanical ventilation · Day 2

Day 2 hypophosphatemia × randomization interaction P
P = 0.025

90-day mortality (after imputing missing phosphate data)

Interaction P; higher mortality with early-PN in hypophosphatemia
P = 0.038
  • Imputed analysis

Original publication

Hypophosphatemia as a biomarker of metabolic intolerance to enhanced nutrition in the PICU: a secondary analysis of the PEPaNIC RCT. Crit Care. Published 12 February 2026. doi:10.1186/s13054-026-05844-x

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