Table 1.
Demographic and Clinical Characteristics of Patients With Versus Without History of MI
| Variables | Total (N=893 429 [100%]) | With medical history of MI (N=81 646 [9.1%]) | Without medical history of MI (N=811 783 [90.9%]) | ASD/HL estimator |
|---|---|---|---|---|
| Age, mean±SD, y | 66.0±12.0 | 70.0±11.0 | 65.6±12.1 | 38.1 |
| Male, N (%) | 555 579 (62.2) | 45 820 (56.1) | 509 759 (62.8) | 13.7 |
| Average income of family, mean±SD, ×103 RMB | 52.7±47.8 | 52.9±47.8 | 52.7±47.8 | 0.4 |
| Still smoking, N (%) | 211 603 (23.7) | 14 467 (17.7) | 197 136 (24.3) | 16.3 |
| History of drinking, N (%) | 207 889 (23.3) | 15 782 (19.3) | 192 107 (23.7) | 10.7 |
| Diagnosis, N (%) | ||||
| IS without TIA | 829 103 (92.8) | 75 466 (92.4) | 753 637 (92.8) | 1.5 |
| TIA | 64 326 (7.2) | 6180 (7.6) | 58 146 (7.2) | 1.5 |
| In‐hospital NIHSS score | ||||
| Mean±SD | 3.0 (2.0–6.0) | 4.0 (2.0–8.0) | 3.0 (1.0–6.0) | 22.5 |
| In‐hospital NIHSS score, N (%) | ||||
| Undocumented | 212 856 (23.8) | 24 829 (30.4) | 188 027 (23.2) | 16.3 |
| 0–4 (Mild stroke) | 442 491 (49.5) | 32 431 (39.7) | 410 060 (50.5) | 21.8 |
| 5–14 (Moderate stroke) | 196 180 (22.0) | 18 553 (22.7) | 177 627 (21.9) | 1.9 |
| ≥15 (Severe stroke) | 41 902 (4.7) | 5833 (7.1) | 36 069 (4.4) | 11.6 |
| Medical history, N (%) | ||||
| Atrial fibrillation or flutter | 46 214 (5.2) | 11 491 (14.1) | 34 723 (4.3) | 34.4 |
| Prior stroke or TIA | 298 479 (33.4) | 35 083 (43.0) | 263 396 (32.4) | 22.0 |
| Hypertension | 571 655 (64.0) | 58 577 (71.7) | 513 078 (63.2) | 18.2 |
| Diabetes | 188 839 (21.1) | 22 164 (27.1) | 166 675 (20.5) | 15.5 |
| Dyslipidemia | 69 304 (7.8) | 9952 (12.2) | 59 352 (7.3) | 16.6 |
| Heart failure | 9281 (1.0) | 4273 (5.2) | 5008 (0.6) | 27.7 |
| PVD | 15 587 (1.7) | 3348 (4.1) | 12 239 (1.5) | 15.8 |
| Prosthetic heart valve | 1440 (0.2) | 796 (1.0) | 644 (0.1) | 12.2 |
| Dementia | 4305 (0.5) | 636 (0.8) | 3669 (0.5) | 3.7 |
| COPD | 10 959 (1.2) | 2291 (2.8) | 8668 (1.1) | 12.3 |
| Liver insufficiency or kidney insufficiency | 8919 (1.0) | 1818 (2.2) | 7101 (0.9) | 10.5 |
| Medications before admission, N (%) | ||||
| Antiplatelet | 188 757 (21.1) | 30 571 (37.4) | 158 186 (19.5) | 40.5 |
| Anticoagulant | 35 703 (4.0) | 7176 (8.8) | 28 527 (3.5) | 22.2 |
| Antihypertensive | 416 553 (46.6) | 47 009 (57.6) | 369 544 (45.5) | 24.4 |
| Cholesterol reducer | 136 489 (15.3) | 21 325 (26.1) | 115 164 (14.2) | 30.0 |
| Diabetic medication | 147 978 (16.6) | 17 978 (22.0) | 130 000 (16.0) | 15.3 |
| Chinese patent drug | 78 607 (8.8) | 12 578 (15.4) | 66 029 (8.1) | 22.8 |
| Measurement | ||||
| Systolic blood pressure, mean±SD, mm Hg | 149.5±23.1 | 147.9±23.5 | 149.7±23.0 | 7.7 |
| Diastolic blood pressure, mean±SD, mm Hg | 86.7±13.9 | 85.0±14.0 | 86.9±13.8 | 13.7 |
| Pulse rate, mean±SD, /min | 76.7±12.7 | 76.6±14.2 | 76.7±12.5 | 0.7 |
| Hospital expenditure, mean±SD, RMB | 12 372.4±10 681.2 | 13 342.9±12 264.9 | 12 275.1±10 504.3 | 9.4 |
| Medicine expenditure, mean±SD, RMB | 5467.8±5504.7 | 6045.1±6463.3 | 5409.7±5395.5 | 10.7 |
| Length of stay, mean±SD, d | 11.0 (7.0–14.0) | 11.0 (8.0–14.0) | 10.0 (7.0–14.0) | 10.0 |
ASD/HL indicates absolute standardized difference/Hodges‐Lehmann; COPD, chronic obstructive pulmonary disease; IQR, interquartile range; IS, ischemic stroke; MI, myocardial infarction; NIHSS, National Institute of Health Stroke Scale; PVD, peripheral vascular disease; RMB, Chinese monetary unit; and TIA, transient ischemic attack.