Copyright 2001 American Medical Association. All Rights Reserved.
Applicable FARS/DFARS Restrictions Apply to Government Use.2001
To the Editor: Dr Polanczyk and colleagues
reported that RHC did not reduce complication rates in patients undergoing
noncardiac surgery. In this case-control study, the authors matched patients
by using a propensity score for RHC and type of procedure. Even though the
patients seem to be matched, we question the authors' method. In contrast
to a randomization procedure that balances groups for all known and unknown
confounding factors, matching groups by using a propensity score takes into
account only selected factors, which is illustrated by the large disparity
in the duration of surgical procedures (5 hours in RHC patients vs 3.9 hours
in non-RHC patients, P<.001), despite similar
De Backer D, Dubois M, Vincent JL. Does Right Heart Catheterization Prevent Perioperative Complications?. JAMA. 2001;286(23):2940–2941. doi:10.1001/jama.286.23.2940
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