SMR Analysis

Version 4.11.19


Observed number of events:

Expected number of events:

Confidence Level: 

 

 
Chi-square value
d.f.
p-value

Chi-square

   

Point Estimate and Confidence Limits  

 

Results:

Lower Confidence Level
SMR
Upper Confidence Level
 
Mid-P exact CI: 1
Fisher's exact CI:   2
Ury & Wiggins CI:   3
Vandenbroucke CI:   4

  Byar CI:

 

5

 Boice-Monson CI:

6

Chi square calculated as (Obs-Exp)2/Exp

In Ury and Vandenbroucke methods, only  90%, 95% & 99% confidence limits are available (NA=not available).

 

1  Mid-P test, based on Miettinen's modification,1974, as described in Epidemiologic Analysis with a Programmable Calculator, 1979.

2  Fisher's exact test, based on (Armitage,1971; Snedecor & Cochran,1965), as described in Epidemiologic Analysis with a Programmable  Calculator, 1979.

3  Ury HK, Wiggins AD. Another shortcut method for calculating the confidence interval of a poisson variable (or of a standardized mortality ratio). Am J Epidemiol 1985; 122:197-8.

4  Vandenbroucke JP. A shortcut method for calculating the 95 percent confidence interval of the standardized mortality ratio. (Letter). Am J Epidemiol 1982; 115:303-4.

5  Byar Method based on Rothman and Boice, Epidemiologic Analysis with a Programmable Calculator, 1979.

6  Boice-Monson Method based on Rothman and Greenland, Modern Epidemiology, 2nd Edition, 1998.  Example default data also from Rothman/Greenland.