Biostatistics & Study Design USMLE Step 1 Practice Question
A 29-year-old woman presents with severe vaginal bleeding and hypotension (BP 80/50, HR 120, RR 22) two days after vaginal delivery of her second child. Despite aggressive fluid resuscitation and transfusion of 6 units packed RBCs, hemoglobin drops to 6.2 g/dL. She develops disseminated intravascular coagulation and expires from hypovolemic shock. County health officials reviewing annual data identify 4 pregnancy-related maternal deaths among 20,000 live births. No thrombophilia is documented. Which calculation represents the maternal mortality ratio?
Answer choices
- A400 per 1,000 pregnancies
- B40 per 100,000 live births
- C20 per 100,000 live birthsCorrect answer
- D2 per 1,000 live births
- E200 per 100,000 women
- F4 per 100,000 live births
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