Non-RA subjects with heart failure, n = 150 | RA subjects with heart failure, n = 250 | |||
Factor X† | No | Yes | No | Yes |
Current smoking | 100 | 0 | 100 | 50 |
No smoking | 50 | 0 | 50 | 50 |
Hazard ratio (HR) smoking/no smoking | 100/50 = 2.0 | 150/100 = 1.5 |
*All data are hypothetical
†Factor X = other mechanism of disease?