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Comment & Response
November 5, 2014

Anesthesia Technique and Outcomes After Hip Fracture Surgery—Reply

Author Affiliations
  • 1Department of Anesthesiology and Critical Care, University of Pennsylvania Perelman School of Medicine, Philadelphia
  • 2Department of Statistics, Wharton School at the University of Pennsylvania, Philadelphia
  • 3Center for Outcomes Research, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
JAMA. 2014;312(17):1802. doi:10.1001/jama.2014.11232

In Reply Our study evaluated the association between anesthesia technique and outcome among patients with hip fracture, observing an indeterminate effect of anesthesia technique on 30-day mortality and a shorter inpatient length of stay with regional anesthesia.

One of our analyses used geographic proximity to hospitals that used more regional anesthesia as an instrumental variable for receipt of regional anesthesia, the thought being that after adjustment for measured medical and socioeconomic characteristics, geographic proximity was not indicative of patients with particular unmeasured health problems.

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