Fig. 3.
By annual hospital delivery volume, the (A) frequency per 100,000 deliveries of maternal cardiac arrest and (B) frequency of survival to hospital discharge from maternal cardiac arrest, the Nationwide Inpatient Sample 1998–2011. Error bars denote the 99% CI.

By annual hospital delivery volume, the (A) frequency per 100,000 deliveries of maternal cardiac arrest and (B) frequency of survival to hospital discharge from maternal cardiac arrest, the Nationwide Inpatient Sample 1998–2011. Error bars denote the 99% CI.

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