Comparison of ‘Power for Randomized
Clinical Trials’ 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 |
67.23% |
60.14% |
59.21% |
52.41% |
71.88% |
69.11% |
72.91% |
70.15% |
PEPI |
65.78% |
59.25% |
60.09% |
52.65% |
72.12% |
69.32% |
72.66% |
69.93% |
EPI 505 |
67.1% |
59.3 |
59.1% |
52.6% |
71.7% |
69.2% |
72.7% |
69.8% |
Confidence interval CI; sample size of treatment-1 ‘n1’; percent with outcome in treatment-1 ‘p1’;
sample size of treatment-2 ‘n2’;
percent with outcome in treatment-2 ‘p2’.
Reference:
· PEPI: Abramson JH and Gahlinger PM (2001). Computer program
for epidemiologists: PEPI version 4.0. Sagebrush Press,
·
Epidemiology 505
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