Table 4.
Units of Increase | Hazard Ratio (95% CI) | P | |
---|---|---|---|
Plaque formation | 1 plaque/yr | 1.22 (1.05–1.42) | 0.01 |
Smoking | — | 2.18 (1.18–4.05) | 0.01 |
Age | 1 yr | 1.02 (1.00–1.04) | 0.03 |
The final model was constructed by starting with the full set of variables listed in “Concise Methods” and by using a backward elimination strategy.