Prevalence of Perinatal Asphyxia Using Apgar Scores and Cord Blood pH and the Relationship between the Two Methods: A Study of FMC Umuahia

Abstract

ABSTRACT Background: Perinatal asphyxia contributes significantly to neonatal morbidity and mortality. It occurs worldwide, and the Apgar score is the most widely used method of diagnosis. Recently, umbilical cord arterial pH has been reported as the most objective way to assess fetal acidosis at birth as it predicts the adverse outcome of perinatal asphyxia. It is imperative to establish the concordance between these two diagnostic methods to reinforce the practicality of the Apgar score as the preferred diagnostic tool for perinatal asphyxia in developing nations, such as Nigeria. Aim: To determine the prevalence of perinatal asphyxia by using the Apgar score and arterial cord blood pH and the relationships between these methods at the Federal Medical Center (FMC), Umuahia. Materials and Methods: This cross-sectional study enrolled 245-term newborns. Perinatal asphyxia was diagnosed using both Apgar scoring and arterial cord blood pH measurements. Data obtained were analyzed using SPSS version 20 and a P value < 0.05 was considered significant. Results: Perinatal asphyxia was reported in 33.1% and 31.4% by using the Apgar score and arterial cord blood pH, respectively. There was a moderate agreement between the two methods for diagnosing perinatal asphyxia (κ = 0.44), and no statistically significant difference was observed in the prevalence of perinatal asphyxia between these methods (McNemar’s χ2 = 0.27, P = 0.699). Furthermore, a strong positive correlation was observed between the Apgar score at 1 and 5 minutes of life and arterial cord blood pH (rs = 0.87, P ≤ 0.001 and rs = 0.80, P ≤ 0.001 respectively). Conclusion: The prevalence of perinatal asphyxia by the two methods was high, and there was no significant difference between both methods of assessing perinatal asphyxia. Thus, the diagnosis of perinatal asphyxia can effectively be made using either the Apgar score or arterial cord blood pH, affirming the practicality and reliability of the Apgar score in resource-limited healthcare settings.