Objective To determine clinical characteristics, demographics and short-term outcomes of neonates diagnosed with fetomaternal haemorrhage (FMH).
Design The authors analysed the Nationwide Inpatient Sample, 1993 to 2008. Singleton births diagnosed with FMH were identified by International Classification of Diseases (ICD-9) code 762.3. Descriptive, univariate and multivariable regression analyses were performed to determine the national annual incidence of FMH over time as well as demographics and clinical characteristics of neonates with FMH.
Results FMH was identified in 12 116 singleton births. Newborns with FMH required high intensity of care: 26.3% received mechanical ventilation, 22.4% received blood product transfusion and 27.8% underwent central line placement. Preterm birth (OR 3.7), placental abruption (OR 9.8) and umbilical cord anomaly (OR 11.4) were risk factors for FMH. Higher patient income was associated with increased likelihood of FMH diagnosis (OR 1.2), and Whites were more likely to be diagnosed than ethnic minorities (OR 1.9). There was reduced frequency of diagnosis in the Southern USA (OR 0.8 vs the Northeastern USA).
Conclusions Diagnosis of FMH is associated with significant morbidity as well as regional, socioeconomic and racial disparity. Further study is needed to distinguish between diagnostic coding bias and true epidemiology of the disease. This is the first report of socioeconomic and racial/ethnic disparities in FMH, which may represent disparities in detection that require national attention.
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