Comparison
of Power Estimation of Unmatched Case Control study to other public software
programs.
Date last tested: 7/11/05.
|
CI%, n1, p1, n2, p2 |
|||||||
Data input |
95%, 100, 20%, 200, 10%1 |
95%, 100, 10%, 200, 20% |
95, 474, 45%, 255, 35.29% |
95, 474, 35.29%, 255, 45% |
||||
software |
Power |
Power with continuity correction |
Power |
Power with continuity correction |
Power |
Power with continuity correction |
Power |
Power with continuity correction |
OpenEpi |
65.78% |
59.26% |
60.09% |
52.65% |
72.12% |
69.32% |
72.67% |
69.93% |
PEPI |
65.78% |
59.25% |
60.09% |
52.5% |
72.12% |
69.32 |
72.66% |
69.93% |
EPI 505 |
65.8% |
NA |
60.08% |
NA |
72.03% |
NA |
72.58% |
NA |
Confidence interval CI;
number of cases ‘n1’; percent
of exposure among cases ‘p1’; number of controls ‘n2’; percent of exposure among controls ‘p2’.
Reference:
·
PEPI: Abramson JH
and Gahlinger PM (2001). Computer program for epidemiologists:
PEPI version 4.0. Sagebrush Press,
·
Epidemiology 505
-