Table 3 Unadjusted and adjusted odds ratio for admission for recurrent myocardial infarction according to number of drugs used for at least 70% of the time.
| Treatment score (range 0–3) | Case (n = 389) | Control (n = 2344) | OR | 95% CI | OR* | 95% CI |
|---|---|---|---|---|---|---|
| 0 Drugs with PDC >70% | 89 (22.9) | 480 (20.5) | Ref | Ref | ||
| 1 Drug with PDC >70% | 136 (35.0) | 701 (29.9) | 1.02 | 0.75 to 1.37 | 0.94 | 0.70 to 1.28 |
| 2 Drugs with PDC >70% | 127 (32.6) | 838 (35.8) | 0.84 | 0.61 to 1.15 | 0.74 | 0.53 to 1.03 |
| 3 Drugs with PDC >70% | 37 (9.5) | 325 (13.9) | 0.66 | 0.42 to 1.04 | 0.59 | 0.37 to 0.94 |
| Addition of 1 drug with PDC>70% | 0.88 | 0.77 to 1.01 | 0.84 | 0.74 to 0.96 |
Values are numbers (%).
OR, odds ratio; PDC, percentage of days covered.
*Adjusted for diabetes mellitus, angina pectoris, use of oral anticoagulants, antiarrhythmic drugs, digoxin and calcium channel blockers, admission for chronic heart failure and percutaneous transluminal coronary angioplasty or coronary artery bypass grafting procedure between first MI and index date.