Logistic Regression of Factors (excluding flu shot status in 1998) Significantly Associated with Flu Shot in the Subsequent Year (1999)*‡
| Variable | Beta | Wald Statistic | df | P Value |
|---|---|---|---|---|
| Disease burden | −0.169 | 65 | 1 | <.01 |
| Level of education | −0.122 | 53 | 1 | <.01 |
| HMO member in 1998 | 0.600 | 52 | 1 | <.01 |
| African American | −0.686 | 47 | 1 | <.01 |
| No. of primary care claims | −0.023 | 29 | 1 | <.01 |
| Current smoker | −0.479 | 28 | 1 | <.01 |
| Married? | 0.283 | 19 | 1 | <.01 |
| Age | −0.018 | 15 | 1 | <.01 |
| Hispanic ancestry | −0.394 | 12 | 1 | <.01 |
| Urban resident | −0.240 | 12 | 1 | <.01 |
| Household income | 0.00 | 7 | 1 | <.05 |
| Total no. of physician claims | −0.004 | 6 | 1 | <.05 |
| Constant | 4.635 | 101 | 1 | <.01 |
* Flu shot: yes = 0, no = 1; for all categorical variables (African American, Hispanic ancestry, smoking, married?, HMO membership, living in urban area) yes = 0, no = 1.
‡ Variables not statistically significant in the model: self-reported health status, level of disability, and number of specialist physician claims. R square of model = 0.115.