Table 5.
Cox proportional hazards analysis of time to stroke
| Cox proportional hazards model |
|||||
|---|---|---|---|---|---|
| Hazard ratio | SE | P value | 95% CI lower | 95% CI upper | |
| Stroke | 20.964 | 2.826 | 0.000 | 16.096 | 27.304 |
| Age | 1.031 | 0.004 | 0.000 | 1.023 | 1.039 |
| Male | 0.841 | 0.084 | 0.082 | 0.692 | 1.022 |
| Midwest | 1.023 | 0.112 | 0.833 | 0.825 | 1.269 |
| Northeast | 0.886 | 0.151 | 0.477 | 0.634 | 1.237 |
| West | 0.899 | 0.177 | 0.590 | 0.611 | 1.323 |
| Hypertension | 1.028 | 0.111 | 0.797 | 0.832 | 1.270 |
| Diabetes | 1.066 | 0.125 | 0.588 | 0.846 | 1.342 |
| TIA | 1.175 | 0.205 | 0.355 | 0.834 | 1.655 |
| COPD | 1.255 | 0.205 | 0.163 | 0.912 | 1.728 |
| CHF | 1.355 | 0.258 | 0.111 | 0.933 | 1.968 |
| MI | 1.334 | 0.420 | 0.361 | 0.719 | 2.474 |
Abbreviations: CHF, congestive heart failure; CI, confidence interval; COPD, chronic obstructive pulmonary disease; MI, myocardial infarction; SE, standard error; TIA, transient ischemic attack.