Simulation Analyses
Histograms of exposure effect parameter estimates derived via Poisson Regression under varying methods for assigning scores to exposure categories.
Exposure Intensity Conforms to the Lognormal (0,1) Distribution
10 Exposure Groups (defined by deciles of the exposure distribution among cases).
1. Scores assigned based on Cell-Specific Mean Values
Frequency
| *****
| *****
| *****
| *****
45 + *****
| *****
| *****
| *****
| *****
40 + *****
| *****
| *****
| *****
| *****
35 + *****
| *****
| *****
| *****
| *****
30 + *****
| *****
|
*****
| *****
| *****
25 + *****
| *****
| *****
| ***** *****
| ***** *****
20 + ***** *****
| ***** *****
| ***** *****
| ***** *****
| ***** *****
15 + ***** ***** *****
| ***** ***** *****
| ***** ***** *****
| ***** ***** *****
| ***** ***** *****
10 + ***** ***** *****
| ***** ***** *****
|
***** ***** ***** *****
|
***** ***** ***** *****
|
***** ***** ***** *****
5 +
***** ***** ***** *****
|
***** ***** ***** ***** *****
| ***** *****
***** ***** *****
|
***** ***** ***** ***** *****
| ***** ***** *****
***** ***** ***** *****
--------------------------------------------------------------------------------------------
-0.0320 -0.0240
-0.0160 -0.0080 0.0000 0.0080 0.0160
Estimate Midpoint
2. Scores assigned based on Category Mean Values
Frequency
| *****
45 + *****
| *****
| *****
| *****
| *****
40 + *****
| *****
| *****
| *****
| *****
35 + *****
| *****
|
*****
| *****
| *****
30 + *****
| *****
| *****
| *****
| *****
25 + *****
| *****
| *****
| ***** *****
| *****
*****
20 + ***** *****
| ***** *****
| ***** *****
| ***** ***** *****
| ***** ***** *****
15 + ***** ***** *****
| ***** ***** *****
| ***** ***** *****
| ***** ***** *****
| ***** ***** *****
10 +
***** ***** *****
|
***** ***** ***** *****
|
***** ***** ***** *****
| ***** *****
***** *****
|
***** ***** ***** *****
5 +
***** ***** ***** *****
|
***** ***** ***** ***** *****
|
***** ***** ***** ***** *****
| ***** *****
***** ***** *****
| ***** ***** *****
***** ***** ***** *****
--------------------------------------------------------------------------------------------
-0.0320 -0.0240
-0.0160 -0.0080 0.0000 0.0080 0.0160
Estimate
Midpoint
3. Scores assigned based on Category Midpoint Values
Frequency
40 + *****
| *****
| *****
| *****
| *****
35 + *****
| *****
| *****
|
*****
| *****
30 + *****
| *****
| *****
| *****
| *****
25 + *****
| *****
| ***** *****
| ***** *****
| ***** *****
20 + ***** *****
| ***** *****
| ***** *****
| ***** *****
| ***** *****
15 + ***** *****
*****
| ***** ***** *****
| ***** ***** *****
|
***** ***** *****
| ***** ***** *****
10 + ***** ***** *****
| ***** ***** *****
|
***** ***** ***** *****
|
***** ***** ***** ***** *****
|
***** ***** ***** ***** *****
5 +
***** ***** ***** ***** *****
| *****
***** ***** ***** ***** *****
| ***** ***** *****
***** ***** ***** *****
| ***** ***** ***** ***** ***** ***** *****
| ***** ***** *****
***** ***** ***** *****
--------------------------------------------------------------------------------------------
-0.0100 -0.0075
-0.0050 -0.0025 0.0000 0.0025 0.0050