Table 3 Sensitivity Analysis 1: Association of risk factors with hazard of ventricular arrhythmias adjusted for specific disease risk factors for ventricular arrhythmias instead of Charlson index
From: Allopurinol and the risk of ventricular arrhythmias in the elderly: a study using US Medicare data
| Â | Multivariable adjusted (Model 3) | Multivariable adjusted (Model 4) | ||
|---|---|---|---|---|
HR (95% CI) | P value | HR (95% CI) | P value | |
Allopurinol use | 0.82 (0.75–0.89) | < 0.0001 | – | – |
Allopurinol use durationa | ||||
 0 days (non-use) | – | – | Ref |  |
 1–180 days | – | – | 0.92 (0.82–1.04) | 0.18 |
 181 days to 2 years | – | – | 0.76 (0.68–0.84) | < 0.0001 |
  > 2 years | – | – | 0.78 (0.65–0.94) | 0.009 |