Table 4.
Drugs prescribed for patients with angina before and after introduction of computerised decision support system. Values are numbers (percentages) of patients unless stated otherwise
| Computerised system (n=1415)
|
Controls (n=1466)
|
Odds ratio (95% CI)
|
|
|---|---|---|---|
| Short acting glyceryl trinitrate | 813 (58); 806 (57) | 831 (57); 802 (55) | 1.11 (0.87 to 1.41) |
| β Blockers | 666 (47); 683 (48) | 712 (49); 718 (49) | 0.99 (0.73 to 1.33) |
| Verapamil | 21 (2); 24 (2) | 18 (1); 21 (1) | 1.02 (0.57 to 1.82) |
| Modified release glyceryl trinitrate | 46 (3); 37 (3) | 46 (3); 43 (3) | 0.97 (0.50 to 1.54) |
| Transdermal glyceryl trinitrate | 19 (1); 14 (1) | 34 (2); 27 (2) | 1.03 (0.54 to 1.98) |
| Isosorbide dinitrate (short acting and modified release) | 64 (5); 56 (4) | 86 (6); 79 (5) | 0.91 (0.63 to 1.31) |
| Isosorbide mononitrate (short acting and modified release) | 522 (37); 524 (37) | 556 (38); 547 (37) | 1.11 (0.79 to 1.56) |
| Diltiazem | 270 (19); 269 (19) | 310 (21); 287 (20) | 1.43 (0.87 to 2.34) |
| Calcium channel blockers | 396 (28); 380 (27) | 377 (26); 368 (25) | 1.12 (0.80 to 1.58) |
| Statins | 409 (29); 498 (35) | 435 (30); 550 (38) | 0.92 (0.67 to 1.25) |
| β Blocker and dinitrate* | 20 (1); 20 (1) | 34 (2); 30 (2) | 1.24 (0.66 to 2.33) |
| Calcium blocker and dinitrate* | 22 (2); 24 (2) | 41 (3); 37 (3) | 1.15 (0.68 to 1.95) |
| Nitrate, calcium blocker, and β blocker* | 113 (8); 102 (7) | 115 (8); 120 (8) | 0.75 (0.46 to 1.22) |
*
Guideline specifically recommended not using these combinations.