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  • Title: Correlates of birth asphyxia using two Apgar score classification methods.
    Author: Olusanya BO, Solanke OA.
    Journal: Nig Q J Hosp Med; 2010; 20(4):153-61. PubMed ID: 21913520.
    Abstract:
    BACKGROUND: Birth asphyxia is commonly indexed by low five-minute Apgar scores especially in resource-constrained settings but the impact of different classification thresholds on the associated risk factors has not been reported. OBJECTIVE: To determine the potential impact of two classification methods of five-minute Apgar score as predictor for birth asphyxia. METHODS: A cross-sectional study of preterm and term survivors in Lagos, Nigeria in which antepartum and intrapartum factors associated with "very low" (0-3) or "intermediate" (4-6) five-minute Apgar scores were compared with correlates of low five-minute Apgar scores (0-6) based on multinomial and binary logistic regression analyses. RESULTS: Of the 4281 mother-infant pairs enrolled, 3377 (78.9%) were full-term and 904 (21.1%) preterm. Apgar scores were very low in 99 (2.3%) and intermediate in 1115 (26.0%). Antenatal care, premature rupture of membranes (PROM), hypertensive disorders and mode of delivery were associated with very low and intermediate Apgar scores in all infants. Additionally, parity, antepartum haemorrhage and prolonged/obstructed labour (PROL) were predictive in term infants compared with maternal occupation and intrauterine growth restriction (IUGR) in preterm infants. Conversely, PROM in term infants and maternal occupation in preterm infants were not significantly associated with the composite low Apgar scores (0-6) while IUGR was associated with term infants. CONCLUSIONS: Predictors of birth asphyxia in preterm and term infants are likely to be affected by the Apgar score classification method adopted and the clinical implications for optimal resuscitation practices merit attention in resource-constrained settings.
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