Table 1. Comparison of Baseline Characteristics Between Patients Who Did and Patients Who Did Not Return to Work Within 12 Months After Acute Myocardial Infarction.
| Characteristic | Patients, No. (%) | P Value | ||
|---|---|---|---|---|
| Total (N = 1566) | Did Not Return to Work (n = 691) | Returned to Work (n = 875) | ||
| Sociodemographic characteristics | ||||
| Age, mean (SD), y | 52.2 (9.7) | 54.5 (10.1) | 50.3 (9.0) | <.001 |
| Female | 130 (8.3) | 86 (12.4) | 44 (5.0) | <.001 |
| Married | 1462 (93.4) | 642 (92.9) | 820 (93.7) | .53 |
| College education | 267 (17.0) | 90 (13.0) | 177 (20.2) | <.001 |
| Occupation | ||||
| Worker | 395 (25.2) | 162 (23.4) | 233 (26.6) | <.001 |
| Farmer | 550 (35.1) | 292 (42.3) | 258 (29.5) | |
| Self-employed | 108 (6.9) | 43 (6.2) | 65 (7.4) | |
| Other | 513 (32.8) | 194 (28.1) | 319 (36.5) | |
| Income last year, RMB (US $) | ||||
| <30 000 (<4400) | 524 (33.5) | 249 (36.0) | 275 (31.4) | <.001 |
| 30 000-70 000 (4400-10 250) | 451 (28.8) | 182 (26.3) | 269 (30.7) | |
| >70 000 (>10 250) | 228 (14.6) | 71 (10.3) | 157 (17.9) | |
| Unreported | 363 (23.2) | 189 (27.4) | 174 (19.9) | |
| Cardiovascular risk factors | ||||
| Prior smoking | 196 (12.5) | 99 (14.3) | 97 (11.1) | .05 |
| Hypertension | 727 (46.4) | 342 (49.5) | 385 (44.0) | .03 |
| Type 2 diabetes | 292 (18.6) | 120 (17.4) | 172 (19.7) | .25 |
| Dyslipidemia | 492 (31.4) | 222 (32.1) | 270 (30.9) | .59 |
| Family history of coronary heart disease | 187 (11.9) | 81 (11.7) | 106 (12.1) | .81 |
| Disease history | ||||
| Angina | 48 (3.1) | 25 (3.6) | 23 (2.6) | .26 |
| Acute myocardial infarction | 80 (5.1) | 32 (4.6) | 48 (5.5) | .45 |
| Percutaneous coronary intervention | 82 (5.2) | 35 (5.1) | 47 (5.4) | .79 |
| Coronary artery bypass grafting | 1 (0.1) | 0 | 1 (0.1) | .37 |
| Coronary heart disease | 620 (39.6) | 275 (39.8) | 345 (39.4) | .88 |
| Ventricular tachycardia or fibrillation | 38 (2.4) | 17 (2.5) | 21 (2.4) | .94 |
| Atrial fibrillation | 32 (2.0) | 21 (3.0) | 11 (1.3) | .01 |
| Heart failure | 345 (22.0) | 161 (23.3) | 184 (21.0) | .28 |
| Valvular heart disease | 1 (0.1) | 1 (0.1) | 0 | .26 |
| Peripheral vascular disease | 7 (0.4) | 3 (0.4) | 4 (0.5) | .95 |
| Ischemic stroke | 4 (0.3) | 3 (0.4) | 1 (0.1) | .21 |
| Chronic renal failure | 6 (0.4) | 3 (0.4) | 3 (0.3) | .77 |
| Clinical characteristics | ||||
| Non–ST-segment elevation acute myocardial infarction | 103 (6.6) | 45 (6.5) | 58 (6.6) | .93 |
| Killip class 3-4 | 63 (4.0) | 30 (4.3) | 33 (3.8) | .57 |
| Inferior wall acute myocardial infarction | 627 (40.0) | 283 (41.0) | 344 (39.3) | .51 |
| Anterior wall acute myocardial infarction | 315 (20.1) | 121 (17.5) | 194 (22.2) | .02 |
| Ischemia >20 min | 1166 (74.5) | 515 (74.5) | 651 (74.4) | .95 |
| Ejection fraction <40% | 84 (5.4) | 45 (6.5) | 39 (4.5) | .07 |
| Coronary artery bypass grafting during index hospitalization | 49 (3.1) | 27 (3.9) | 22 (2.5) | .12 |
| Percutaneous coronary intervention during index hospitalization | 1165 (74.4) | 523 (75.7) | 642 (73.4) | .30 |
| Length of stay, median (IQR), d | 11.0 (8.0-14.0) | 11.0 (8.0-14.0) | 11.0 (8.0-14.0) | .48 |
| In-hospital complications | ||||
| Recurrent angina | 368 (23.5) | 181 (26.2) | 187 (21.4) | .03 |
| Recurrent acute myocardial infarction | 16 (1.0) | 9 (1.3) | 7 (0.8) | .33 |
| Atrial fibrillation | 27 (1.7) | 17 (2.5) | 10 (1.1) | .047 |
| Cardiopulmonary resuscitation | 17 (1.1) | 7 (1.0) | 10 (1.1) | .81 |
| Ventricular tachycardia | 81 (5.2) | 42 (6.1) | 39 (4.5) | .15 |
| Ventricular fibrillation | 40 (2.6) | 14 (2.0) | 26 (3.0) | .24 |
| New-onset heart failure | 95 (6.1) | 47 (6.8) | 48 (5.5) | .28 |
| Infection | 190 (12.1) | 95 (13.7) | 95 (10.9) | .08 |
| Stroke | 23 (1.5) | 16 (2.3) | 7 (0.8) | .01 |
| Bleeding | 136 (8.7) | 67 (9.7) | 69 (7.9) | .21 |
| Region | ||||
| Central | 757 (48.3) | 357 (51.7) | 400 (45.7) | .02 |
| East | 619 (39.5) | 265 (38.4) | 354 (40.5) | |
| West | 190 (12.1) | 69 (10.0) | 121 (13.8) | |
| Urban | 1244 (79.4) | 555 (80.3) | 689 (78.7) | .44 |
| Hospital type | ||||
| Teaching hospital | 1171 (74.8) | 507 (73.4) | 664 (75.9) | .26 |
| Tertiary hospital | 1285 (82.1) | 580 (83.9) | 705 (80.6) | .09 |
Abbbreviations: IQR, interquartile range; RMB, renminbi.