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Diagnostic accuracy of ED POCUS versus radiologist-interpreted US for documenting FCA: Sensitivity = 88.9% (95% CI 75.9%–96.2%); specificity = 100.0% (95% CI 89.6%–100.0%); PPV = 100.0% (95% CI 91.1%–100.0%); NPV = 87.2% (95% CI 72.6%–95.7%); κ = 0.87 (95% CI 0.77–0.98).
ED—emergency department, FCA—fetal cardiac activity, NPV—negative predictive value, POCUS—point-of-care ultrasound, PPV—positive predictive value, US—ultrasound.
