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. Author manuscript; available in PMC: 2015 May 27.
Published in final edited form as: Anesthesiology. 2014 Apr;120(4):810–818. doi: 10.1097/ALN.0000000000000159

Fig. 3.

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.