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Person-Time Rate and 95% Confidence Intervals |
Per 100 Person-Time Units |
|
| Number of cases: | 66 | |
| Person-Time: | 2098 | |
|
|
| Lower CL | Rate | Upper CL |
|
Normal approximation | 2.387 | 3.146 | 3.905 |
Byar approx. Poisson | 2.433 | | 4.002 |
Rothman/Greenland | 2.472 | | 4.004 |
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"Normal approximation" to the Poisson distribution as described by Rosner, Fundamentals of Biostatistics (5th Ed) |
"Byar approximation to the Poisson" as described in Rothman and Boice, Epidemiologic Analysis with a Programmable Calculator |
"Rothman/Greenland" as described in Rothman and Greenland, Modern Epidemiology (2nd Ed) |
Note The Rothman/Greenland results have not been validated against other sources. |