Table 3.
Data on antibody titers against swine H1N2 influenza, modeled as a function of age (in decades). Example of univariate comparison using the Trend Odds Model fit in SAS (model has proportional odds assumption violated and there is a trend in OR).
| Total (n=349) |
Antibody titer level | |||||
|---|---|---|---|---|---|---|
| <1:10 (n=214) |
1:10 (n=56) |
1:20 (n=38) |
1:40 (n=28) |
≥1:80 (n=13) |
||
| Odds Ratio (per decade age) | ||||||
| Estimated from individual logistic regression models |
--- | --- | 1.68 | 1.39 | 1.33 | 1.25 |
| Estimated from Trend Odds model (TOM) |
--- | --- | 1.67 | 1.47 | 1.28 | 1.12 |