Original Investigation

Cerebral Palsy Risk by Combined Apgar Score and Umbilical Cord Blood pH Levels

JAMA Network Open 10.1001/jamanetworkopen.2025.59359

February 18, 2026 at 11:00 AM EST

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Is perinatal hypoxia assessed by the combination of clinical and biochemical measures (Apgar score and umbilical cord blood pH) associated with cerebral palsy?In this cohort study of 825 159 singleton newborns (≥35 gestational weeks), the combination of low Apgar score and low umbilical cord blood pH was associated with an increased risk of cerebral palsy, substantially higher than when 1 measure was abnormal.This study found that cerebral palsy risk was highest when both clinical and biochemical measures were abnormal.

Corresponding Author: Mette Vestergård Pedersen, MD, Department of Pediatrics and Adolescent Medicine, Aarhus University Hospital, Palle Juul-Jensens Blvd 99, 8200 Aarhus N, Denmark (mvp@clin.au.dk).

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