| Variable | RoI* | NI* | RoI, n (%) | NI, n (%) | p Value | Difference (95% CI) |
| Male gender | 588 | 315 | 423 (71.9) | 208 (66.0) | 0.06 | 5.9 (−0.4 to 12.3) |
| Age, years (mean (SD)† | 588 | 315 | 68.2 (9.7) | 66.2 (9.3) | 0.003 | 2.0 (0.7 to 3.3) |
| Completed secondary education | 576 | 297 | 190 (33.0) | 134 (45.1) | <0.001 | −12.1 (−18.9 to −5.3) |
| Non-manual occupation | 436 | 222 | 236 (54.1) | 116 (52.3) | 0.65 | 1.9 (−6.1 to 9.9) |
| Years since CHD diagnosed (mean (SD)) | 545 | 12 | 7.9 (6.2) | 8.9 (7.0) | 0.03 | −1.0 (−2.0 to −0.1) |
| History of MI | 588 | 15 | 305 (51.9) | 148 (47.0) | 0.16 | 4.9 (−2.0 to 11.6) |
| History of angina | 588 | 315 | 537 (91.3) | 267 (84.8) | 0.003 | 6.6 (2.2 to 11.4) |
| History of diabetes | 586 | 315 | 90 (15.4) | 70 (22.2) | 0.01 | −6.9 (−12.5 to −1.6) |
| Blood glucose level ever recorded | 588 | 315 | 478 (81.3) | 234 (74.3) | 0.01 | 7.0 (1.4 to 12.9) |
| Record of PTCA | 587 | 15 | 226 (38.5) | 49 (15.6) | <0.001 | 22.9 (17.1 to 28.3) |
| Record of CABG | 587 | 315 | 196 (33.4) | 42 (13.3) | <0.001 | 20.1 (14.5 to 25.2) |
| Distance from hospital, miles (mean (SD)) | 479 | 267 | 17.6 (17.3) | 7.1 (7.5) | <0.001 | 10.5 (8.8 to 12.3) |
| Blood pressure | ||||||
| Systolic BP >140 mm Hg | 585 | 14 | 217 (37.1) | 88 (28.0) | 0.01 | 9.1 (2.6 to 15.2) |
| Diastolic BP >90 mm Hg | 587 | 314 | 77 (13.1) | 34 (10.8) | 0.32 | 2.3 (−2.3 to 6.6) |
| Mean systolic BP, mm Hg (SD) | 579 | 314 | 138.9 (22.5) | 132.2 (19.3) | <0.001 | 6.6 (3.8 to 9.4) |
| Mean diastolic BP, mm Hg (SD) | 579 | 314 | 79.8 (11.6) | 77.4 (11.5) | 0.004 | 2.4 (0.8 to 4.0) |
| Last recorded systolic BP >140 mm Hg | 570 | 314 | 186 (32.6) | 83 (26.4) | 0.06 | 6.2 (−0.2 to 12.2) |
| Last recorded diastolic BP >90 mm Hg | 570 | 314 | 25 (4.4) | 8 (2.5) | 0.17 | 1.8 (−0.9 to 4.2) |
| BP record in past year | 587 | 315 | 520 (88.6) | 305 (96.8) | <0.001 | −8.2 (−11.4 to −4.8) |
| Cholesterol | ||||||
| Total cholesterol >5.0 mmol/l | 571 | 289 | 138 (24.2) | 50 (17.3) | 0.02 | 6.9 (1.0 to 12.2) |
| Mean total cholesterol, mmol/l (SD) | 571 | 289 | 4.4 (1.0) | 4.3 (0.8) | 0.04 | 0.1 (0.01 to 0.2) |
| Cholesterol recorded in previous year | 587 | 315 | 398 (67.8) | 280 (88.9) | <0.001 | −21.1 (−26.0 to −15.7) |
| Previous record total cholesterol >5.0 mmol/l | 523 | 309 | 159 (30.4) | 58 (18.8) | <0.001 | 11.6 (5.6 to 17.3) |
| Waist–hip ratio | ||||||
| WHR, mean (SD) | 579 | 312 | 0.9 (0.1) | 0.9 (0.1) | 0.01 | 0.01 (0.004 to 0.03) |
| WHR >0.9 male; >0.7 female | 579 | 312 | 521 (90.0) | 281 (90.1) | 0.97 | −0.1 (−4.0 to 4.3) |
| Body mass index | ||||||
| BMI, mean (SD) | 587 | 312 | 28.6 (4.8) | 29.1 (5.3) | 0.12 | −0.5 (−1.2 to 0.2) |
| BMI >25 | 587 | 312 | 471 (80.2) | 255 (81.7) | 0.59 | −1.5 (−6.7 to 4.1) |
| BMI >27.5 | 587 | 312 | 316 (53.8) | 179 (57.4) | 0.31 | −3.5 (−10.3 to 3.3) |
*Number of valid responses; †range 29–95 years.
BMI, body mass index; BP, blood pressure; CABG, coronary artery bypass graft; CHD, coronary heart disease; MI, myocardial infarction; NI, Northern Ireland; PTCA, percutaneous transluminal coronary angioplasty; RoI, Republic of Ireland; WHR, waist–hip ratio.