Baseline characteristics for the matched and weighted exposed health event and unexposed control cohorts
| Characteristic | Acute MI (%)* | Cardiac arrest (%)* | Stroke (%)* | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Exposed cohort n = 19 129 | Matched control cohort n = 1 820 644 | Std. diff. | Exposed cohort n = 1043 | Matched control cohort n = 307 375 | Std. diff. | Exposed cohort n = 4395 | Matched control cohort n = 888 481 | Std. diff. | |
| Age in Y0, mean ± SD; yr | 53.0 ± 5.5 | 52.9 ± 5.5 | 0.012 | 52.6 ± 5.7 | 52.5 ± 5.8 | 0.010 | 53.1 ± 5.8 | 53.0 ± 5.8 | 0.012 |
| Sex, female | 3655 (19.1) | 347 873 (19.1) | 0.000 | 247 (23.7) | 72 792 (23.7) | 0.000 | 1522 (34.6) | 307 683 (34.6) | 0.000 |
| Province of residence in Y−1 | Various | Various | All 0.000 | Various | Various | All 0.000 | Various | Various | All 0.000 |
| Urban residence in Y−1 | 16 054 (83.9) | 1 527 974 (83.9) | 0.000 | 940 (90.1) | 277 021 (90.1) | 0.000 | 3821 (86.9) | 772 443 (86.9) | 0.000 |
| Married/common law in Y−1 | 15 299 (79.9) | 1 455 164 (79.9) | 0.000 | 852 (81.7) | 251 087 (81.7) | 0.000 | 3287 (74.8) | 664 491 (74.8) | 0.000 |
| Union member in Y−1 | 5954 (31.1) | 566 685 (31.1) | 0.000 | 338 (32.4) | 99 610 (32.4) | 0.000 | 1365 (31.1) | 275 945 (31.1) | 0.000 |
| Any self-employment in Y−1 | 3101 (16.2) | 294 144 (16.2) | 0.000 | 154 (14.8) | 45 384 (14.8) | 0.000 | 636 (14.5) | 128 572 (14.5) | 0.000 |
| Earnings in Y−1, mean ± SD; 2012$ | 53 263 ± 44 572 | 53 618 ± 45 883 | −0.008 | 55 192 ± 47 141 | 55 044 ± 47 162 | 0.003 | 47 657 ± 41 9 33 | 48 131 ± 43 884 | −0.011 |
| Earnings in Y−2, mean ± SD; 2012$ | 54 115 ± 44 527 | 54 465 ± 45 954 | −0.008 | 54 827 ± 44 332 | 55 442 ± 46 679 | −0.014 | 48 585 ± 41 944 | 48 995 ± 43 693 | −0.010 |
| At least 1 hospital day in Y−3, Y−2, Y−1 | 2023 (10.6) | 192 543 (10.6) | 0.000 | 199 (19.1) | 58 646 (19.1) | 0.000 | 689 (15.7) | 139 286 (15.7) | 0.000 |
| Had children < 18 yr of age in Y−1 | 5547 (29.0) | 544 634 (29.9) | −0.020 | 339 (32.5) | 97 710 (31.8) | 0.015 | 1182 (26.9) | 253 929 (28.6) | −0.038 |
| No. of children < 18 yr in Y−1, of those with children | |||||||||
| Mean ± SD | 1.6 ± 0.8 | 1.6 ± 0.8 | −0.020 | 1.6 ± 0.8 | 1.6 ± 0.8 | 0.002 | 1.6 ± 0.8 | 1.6 ± 0.8 | |
| Median (IQR) | 1 (1–2) | 1 (1–2) | 1 (1–2) | 1 (1–2) | 1 (1–2) | 1 (1–2) | −0.055 | ||
| Charlson Comorbidity Score | |||||||||
| Mean ± SD | 0.11 ± 0.40 | 0.29 ± 0.61 | 0.44 ± 0.87 | ||||||
| Median (IQR) | 0 (0–0) | 0 (0–0) | 0 (0–0) | ||||||
| Index hospital LOS, d | |||||||||
| Mean ± SD | 5.8 ± 6.2 | 14.3 ± 17.0 | 12.8 ± 21.4 | ||||||
| Median (IQR) | 3 (4–6) | 5 (9–18) | 3 (6–12) | ||||||
| In special care unit | 14 921 (78.0) | 943 (90.4) | 958 (21.8) | ||||||
| Mechanical ventilation | 1817 (9.5) | 504 (48.3) | 251 (5.7) | ||||||
| Cardiac catheterization | 15 475 (80.9) | 721 (69.1) | |||||||
| Coronary revascularization | 12 625 (66.0) | 464 (44.5) | |||||||
| Stroke type | |||||||||
| Ischemic | 2707 (61.6) | ||||||||
| Hemorrhagic | 615 (14.0) | ||||||||
| Not specified | 193 (24.4) | ||||||||
Note: IQR = interquartile range, LOS = length of stay, MI = myocardial infarction, SD = standard deviation, std. diff. = standardized difference = (mean2 − mean1)/[(SD12 + SD22)/2]1/2, Y0 = calendar year of index health event, Y−1 = previous year before health event, Y−2 = 2 years before the health event, Y+3 = third calendar year after Y0.
↵* Unless specified otherwise.