Table 1.
Patient characteristics by treatment group at baseline among 2632 patients after myocardial infarction. Values are number (%) unless stated otherwise
| Characteristics | Treatment group | Total (n=2632) | ||
|---|---|---|---|---|
| Usual care (n=876) | Mail-outs (n=878) | Mail-outs amd phone calls (n=878) | ||
| Centre: | ||||
| A | 175 (20.0) | 180 (20.5) | 172 (19.6) | 527 (20.0) |
| B | 61 (7.0) | 62 (7.1) | 62 (7.1) | 185 (7.0) |
| C | 130 (14.8) | 131 (14.9) | 129 (14.7) | 390 (14.8) |
| D | 78 (8.9) | 72 (8.2) | 76 (8.7) | 226 (8.6) |
| E | 75 (8.6) | 71 (8.1) | 73 (8.3) | 219 (8.3) |
| F | 111 (12.7) | 116 (13.2) | 14 (1.6) | 341 (13.0) |
| G | 54 (6.2) | 55 (6.3) | 55 (6.3.) | 164 (6.2) |
| H | 58 (6.6) | 56 (6.4) | 62 (7.1) | 176 (6.7) |
| I | 134 (15.3) | 135 (15.4) | 135 (15.4) | 404 (15.3) |
| Age, mean (SD) | 66.8 (12.5) | 66.8 (12.6) | 65.9 (12.1) | 66.0 (12.4) |
| Ontario Drug Benefit Programme coverage due to age ≥65: | ||||
| No | 402 (45.9) | 392 (44.6) | 426 (48.5) | 1220 (46.4) |
| Yes | 474 (54.1) | 486 (55.4) | 452 (51.5) | 1412 (53.6) |
| Sex: | ||||
| Male | 624 (71.2) | 626 (71.3) | 626 (71.3) | 1876 (71.3) |
| Female | 252 (28.8) | 252 (28.7) | 252 (28.7) | 756 (28.7) |
| Rurality: | ||||
| Rural | 141 (16.1) | 153 (17.4) | 132 (15.0) | 426 (16.2) |
| Urban | 731 (83.4) | 719 (81.9) | 741 (84.4) | 2191 (83.2) |
| Missing | 4 (0.5) | 6 (0.7) | 5 (0.6) | 15 (0.6) |
| Neighbourhood income (divided into five equal groups)*: | ||||
| 1 (lowest) | 186 (21.2) | 184 (21.0) | 195 (22.2) | 565 (21.5) |
| 2 | 196 (22.4) | 188 (21.4) | 182 (20.7) | 566 (21.5) |
| 3 | 171 (19.5) | 170 (19.4) | 165 (18.8) | 506 (19.2) |
| 4 | 159 (18.2) | 168 (19.1) | 189 (21.5) | 516 (19.6) |
| 5 (highest) | 160 (18.3) | 162 (18.5) | 142 (16.2) | 464 (17.6) |
| Missing | 4 (0.5) | 6 (0.7) | 5 (0.6) | 15 (0.6) |
| Previous cardiac event or procedure†: | ||||
| No | 512 (58.4) | 523 (59.6) | 535 (60.9) | 1570 (59.7) |
| Yes | 333 (38.0) | 319 (36.3) | 320 (36.4) | 972 (36.9) |
| Missing | 31 (3.5) | 36 (4.1) | 23 (2.6) | 90 (3.4) |
| History of smoking: | ||||
| Never | 326 (37.2) | 320 (36.4) | 338 (38.5) | 984 (37.4) |
| Current | 214 (24.4) | 209 (23.8) | 207 (23.6) | 630 (23.9) |
| Former | 239 (27.3) | 232 (26.4) | 242 (27.6) | 713 (27.1) |
| Missing | 97 (11.1) | 117 (13.3) | 91 (10.4) | 305 (11.6) |
| Diabetes: | ||||
| No | 591 (67.5) | 599 (68.2) | 594 (67.7) | 1784 (67.8) |
| Yes | 277 (31.6) | 267 (30.4) | 275 (31.3) | 819 (31.1) |
| Missing | 8 (0.9) | 12 (1.4) | 9 (1.0) | 29 (1.1) |
| Treatment at index catheterisation: | ||||
| Surgery and medication | 26 (3.0) | 20 (2.3) | 22 (2.5) | 68 (2.6) |
| Stent and medication | 529 (60.4) | 552 (62.9) | 532 (60.6) | 1613 (61.3) |
| Medication only | 321 (36.6) | 306 (34.9) | 324 (36.9) | 951 (36.1) |
Owing to rounding, the sum of column percentages might exceed 100%. The variables included represent a subset of those collected by the investigators from the CorHealth registry. This subset was chosen as all the variables in table 1 were adjusted for in at least one multiple imputation model (supplementary statistical appendix). No significant differences in any measured baseline characteristics were found among treatment groups at P≤0.05.
Derived on the basis of participant’s postal code using a macro created by Statistics Canada.
Indicator representing whether a patient had a history of prior myocardial infarction coronary vascular disease, or coronary revascularisation (percutaneous coronary intervention or coronary artery bypass graft) procedure.