Source(s)

Nichol G, Stiell I, Laupacis A, Pham B, De Maio V, Wells G. ' A Cumulative Meta-Analysis of the Effectiveness of Defibrillator-Capable Emergency Medical Services for Victims of Out-of-Hospital Cardiac Arrest.' Annals of Emergency Medicine 34 (4.1) 1999: pg 517-525.

Calculation(s) by Book of Odds Based On

Rosamond W, Flegal K, Furie K, Go A, Greenlund K, Haase N, et al.; American Heart Association Statistics Committee and Stroke Statistics Subcommittee. 'Heart Disease and Stroke Statistics--2008 Update' Circulation 117(4) 2008: pgs e25-e146.

Population Estimates Program [Internet]. U.S. Census Bureau; Available from: http://www.census.gov/popest/estimates.php

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Odds Statement provided by Book of Odds Inc., http://www.bookofodds.com/content/view/full/611040 (Accessed: )

Rounding Rules

Odds more likely than 1 in 10, such as 1 in 3.42, are rounded to three significant digits. Odds less likely than 1 in 10, such as 1 in 420.4, are rounded to four significant digits. Trailing zeros after the decimal point are dropped for readability, even though they may still be significant.

Odds you'll see: 1 in 4.26; 14.5; 143; 5,230; 433,200

Odds you won't see: 1 in 2.412; 63.042; 425,242c