1. Resuscitation in the Hospital: Circadian Variation of Cardiopulmonary Arrest 
Jennifer L. Jones-Crawford, MD, David C. Parish, MD, MPH, FACP, Betsy E. Smith, MPH, Francis C. Dane, PhD 
The American Journal of Medicine 
Volume 120, Issue 2, Pages (February 2007)
DOI: /j.amjmed
Copyright © 2007 Elsevier Inc. Terms and Conditions

2. Figure 1
In-hospital Utstein style template. ED=emergency department; SVT=supraventricular tachycardia; BLS=basic life support; ALS=advanced life support; VF=ventricular fibrillation; VT=ventricular tachycardia; PEA=pulseless electrical activity.
The American Journal of Medicine  , DOI: ( /j.amjmed )
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3. Figure 2 Goodness of fit for hourly event frequency. χ2=41.2; P=.01.
The American Journal of Medicine  , DOI: ( /j.amjmed )
Copyright © 2007 Elsevier Inc. Terms and Conditions

4. Figure 3
Goodness of fit for frequency of events. χ2=7.2; P=.20; χ2=6.5; P <.025 (comparing peak and trough).
The American Journal of Medicine  , DOI: ( /j.amjmed )
Copyright © 2007 Elsevier Inc. Terms and Conditions

5. Figure 4
Cardiac disease event frequency versus other diagnoses. χ2=3.4; P <.75 for other diagnoses; χ2=8.9; .10<P <.25 for all cardiac disease.
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6. Figure 5
Goodness of fit for perfusing rhythm event frequency. χ2=12.4; P=.03.
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7. Figure 6
Goodness of fit for asystolic event frequency. χ2=14.6; P=.01.
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8. Figure 7
Frequency of asystolic events witnessed versus unwitnessed. χ2=18.8; P=.002.
The American Journal of Medicine  , DOI: ( /j.amjmed )
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9. Figure 8 Frequency of events by survival to discharge. χ2=9.0; P=.11.
The American Journal of Medicine  , DOI: ( /j.amjmed )
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