| Variable | RoI* | NI* | RoI, n (%) | NI, n (%) | p Value | Difference (95% CI) |
| Statin | 588 | 315 | 491 (83.5) | 269 (85.4) | 0.46 | −1.9 (−6.6 to 3.2) |
| Lipid lowering agent (statin, fibrate, ezetrol) | 588 | 315 | 497 (84.5) | 277 (87.9) | 0.16 | −3.4 (−7.9 to 1.5) |
| ACE inhibitor | 588 | 315 | 243 (41.3) | 151 (47.9) | 0.06 | −6.6 (−13.4 to 0.2) |
| β Blocker | 588 | 315 | 325 (55.3) | 219 (69.5) | <0.001 | −14.2 (−20.5,−7.6) |
| Aspirin | 588 | 315 | 489 (83.2) | 242 (76.8) | 0.02 | 6.3 (0.9 to 12.0) |
| Mean (SD) | Mean (SD) | |||||
| Medication compliance (MARS score) | 514 | 278 | 24.2 (1.8) | 24.0 (1.7) | 0.07 | 0.24 (−0.02−0.50) |
| GP visits (recorded) | 527 | 315 | 5.6 (4.5) | 4.4 (2.8) | <0.001 | 1.2 (0.7 to 1.7) |
| Practice nurse visits (record) | 527 | 315 | 1.6 (2.9) | 2.1 (1.8) | 0.001 | −0.5 (−0.9 to −0.2) |
| Hospital admissions (record) | 578 | 314 | 0.4 (0.8) | 0.3 (0.5) | <0.001 | 0.2 (0.1 to 0.2) |
| Inpatient days (chart) | 544 | 303 | 2.3 (5.9) | 1.1 (3.0) | <0.001 | 1.3 (0.7 to 1.8) |
| Outpatient visits (chart) | 546 | 314 | 2.8 (3.8) | 2.0 (2.5) | 0.001 | 0.7 (0.3 to 1.2) |
| GP visits (self-report) | 535 | 277 | 6.9 (6.5) | 4.6 (4.1) | <0.001 | 2.3 (1.6 to 3.0) |
| Practice nurse visits (self-report) | 507 | 285 | 2.7 (5.3) | 3.5 (3.8) | 0.03 | −0.8 (−1.5 to −0.1) |
| Hospital admissions (self-report) | 550 | 277 | 0.6 (1.1) | 0.4 (0.8) | <0.001 | 0.2 (0.1 to 0.4) |
| Inpatient days (self-report) | 552 | 271 | 4.4 (11.1) | 2.8 (9.7) | 0.04 | 1.6 (0.1 to 3.1) |
| Outpatient visits (self-report) | 546 | 275 | 2.6 (4.5) | 2.3 (2.9) | 0.41 | 0.2 (−0.3 to 0.8) |
*Number of valid responses
GP, general practitioner; MARS, Medication Adherence Report Scale questionnaire; NI, Northern Ireland; RoI, Republic of Ireland.