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Correspondence  |   July 2009
Surgical Demand Time Variance: A Possible Explanation for Lunar Effects and Some Other Mysterious Cycles
Author Affiliations & Notes
  • David P. Strum, M.D.
    *
  • *Hospital University of Pennsylvania, Philadelphia, Pennsylvania.
Article Information
Correspondence
Correspondence   |   July 2009
Surgical Demand Time Variance: A Possible Explanation for Lunar Effects and Some Other Mysterious Cycles
Anesthesiology 7 2009, Vol.111, 204. doi:10.1097/ALN.0b013e3181a95c14
Anesthesiology 7 2009, Vol.111, 204. doi:10.1097/ALN.0b013e3181a95c14
In Reply:—
The authors are grateful to Dr. Schonberger for his thoughtful comments with respect to our recent manuscript entitled “Observations on Surgical Demand Time Series: Detection and Resolution of Holiday Variance.”1 
Dr. Schonberger's speculations regarding the Jewish lunar calendar are astute, and we believe they may have merit. We are investigating these nontrivial cycles of surgical demand further and hope to determine a definitive answer in the near future.
*Hospital University of Pennsylvania, Philadelphia, Pennsylvania.
Reference
Reference
Moore IC, Strum DP, Vargas LG, Thomson DJ: Observations on surgical time demand series: Detection and resolution of holiday variance. Anesthesiology 2008; 109:408–16Moore, IC Strum, DP Vargas, LG Thomson, DJ