Comparison of SMR of OpenEpi to other statistical software and textbooks.

 

 

 

Input

Output

 

Observed and expected number of events, and confidence intervals

Mid-P exact two-tailed p

Fisher exact two-tailed p

Exact Confidence limit (Lower, upper)

OpenEpi

 

 

 

 

 

4, 3.3, 95%

0.6571

0.8393

0.3303, 3.103

Rosner

 

 

NA

0.839

NA

Simple Interactive Statistical Analysis (SISA)

 

0.65707

0.8393

0.33026, 3.1035

PEPI

 

 

0.657

0.839*

0.3303, 3.103

OpenEpi

 

 

 

 

 

21, 18.1, 95%

0.4851

0.5546

0.7182, 1.773

Rosner

 

 

NA

0.5546

NA

Simple Interactive Statistical Analysis (SISA)

 

0.48507

0.5546

0.71819, 1.7735

PEPI

 

0.481

0.551*

0.7182, 1.7735

OpenEpi

 

 

 

 

 

 

7678, 11005.654, 95%

<0.00001

<0.00001

0.6821, 0.7134

Simple Interactive Statistical Analysis (SISA)

 

0.000

0.000

Not computed because of too many events for a reliable estimate.

PEPI

 

NA

NA

0.68212, 0.71342

 

 

Input

Output

 

Observed and expected number of events, and confidence intervals

Mid-P Exact two-tailed p

Fisher exact two-tailed p

Byar approximation two-tailed p

Rothman/Greenland Approximation:

95% Confidence limit (Lower, upper)

OpenEpi

 

 

 

 

 

41, 23, 95%

0.00087

0.001141

0.00117

1.296, 2.39

Rothman & Boice

 

0.00087

0.001141

0.00117

1.30, 2.39

Simple Interactive Statistical Analysis (SISA)

0.00087

0.00114

NA

1.2957,  2.3898

 

 

References:
·        Rosner B. Fundamentals of Biostatistics, 5th Edition. Duxbury  Press, 2000.

·        Simple Interactive Statistical Analysis (SISA-Exact module)  http://home.clara.net/sisa/smrhlp.htm

·        PEPI: Abramson JH and Gahlinger PM (2001). Computer program for epidemiologists: PEPI version 4.0. Sagebrush Press, Salt Lake City.

·        Rothman KJ and Greenland S. Modern Epidemiology, 2nd Edition. Lippincott-Raven Publishers, Philadelphia, 1998.
·        Rothman KJ and Boice JD  Jr. Epidemiologic analysis with a programmable calculator. NIH Pub No. 79-1649.  Bethesda, MD:  National Institutes of Health, 1979, 31-32.