Table 2. Baseline Patient Characteristics by Reason for Not Returning to Work.
| Characteristic | Patients, No. (%) | P Value | |||
|---|---|---|---|---|---|
| AMI-Related (n = 287) | AMI-Related Early Retirement (n = 131) | Full-time Homemaker or Unemployed (n = 44) | Unspecified (n = 229) | ||
| Sociodemographic characteristics | |||||
| Age, mean (SD), y | 56.1 (9.5) | 53.9 (8.4) | 56.2 (10.2) | 52.6 (11.2) | <.001 |
| Female | 38 (13.2) | 6 (4.6) | 13 (29.5) | 29 (12.7) | <.001 |
| Married | 265 (92.3) | 124 (94.7) | 40 (90.9) | 213 (93.0) | .80 |
| College education | 14 (4.9) | 29 (22.1) | 3 (6.8) | 44 (19.2) | <.001 |
| Occupation | |||||
| Worker | 68 (23.7) | 42 (32.1) | 6 (13.6) | 46 (20.1) | <.001 |
| Farmer | 149 (51.9) | 26 (19.8) | 26 (59.1) | 91 (39.7) | |
| Self-employed | 18 (6.3) | 5 (3.8) | 4 (9.1) | 16 (7.0) | |
| Other | 52 (18.1) | 58 (44.3) | 8 (18.2) | 76 (33.2) | |
| Income last year, RMB (US $) | |||||
| <30 000 (<4400) | 133 (46.3) | 22 (16.8) | 21 (47.7) | 73 (31.9) | <.001 |
| 30 000-70 000 (4400-10 250) | 70 (24.4) | 48 (36.6) | 11 (25.0) | 53 (23.1) | |
| >70 000 (>10 250) | 17 (5.9) | 24 (18.3) | 2 (4.5) | 28 (12.2) | |
| Unreported | 67 (23.3) | 37 (28.2) | 10 (22.7) | 75 (32.8) | |
| Cardiovascular risk factors | |||||
| Prior smoking | 48 (16.7) | 16 (12.2) | 8 (18.2) | 27 (11.8) | .31 |
| Family history of coronary heart disease | 30 (10.5) | 18 (13.7) | 7 (15.9) | 26 (11.4) | .63 |
| Hypertension | 145 (50.5) | 62 (47.3) | 20 (45.5) | 115 (50.2) | .87 |
| Type 2 diabetes | 47 (16.4) | 32 (24.4) | 8 (18.2) | 33 (14.4) | .10 |
| Dyslipidemia | 94 (32.8) | 52 (39.7) | 15 (34.1) | 61 (26.6) | .08 |
| Disease history | |||||
| Angina | 13 (4.5) | 6 (4.6) | 1 (2.3) | 5 (2.2) | .46 |
| AMI | 15 (5.2) | 8 (6.1) | 0 | 9 (3.9) | .35 |
| Percutaneous coronary intervention | 13 (4.5) | 11 (8.4) | 0 | 11 (4.8) | .13 |
| Coronary artery bypass grafting | 0 | 0 | 0 | 0 | NA |
| Coronary heart disease | 126 (43.9) | 56 (42.7) | 14 (31.8) | 79 (34.5) | .10 |
| Ventricular tachycardia or fibrillation | 8 (2.8) | 1 (0.8) | 2 (4.5) | 6 (2.6) | .47 |
| Atrial fibrillation | 10 (3.5) | 3 (2.3) | 1 (2.3) | 7 (3.1) | .91 |
| Heart failure | 66 (23.0) | 37 (28.2) | 8 (18.2) | 50 (21.8) | .44 |
| Valvular heart disease | 0 | 1 (0.8) | 0 | 0 | .23 |
| Peripheral vascular disease | 0 | 1 (0.8) | 0 | 2 (0.9) | .43 |
| Ischemic stroke | 1 (0.3) | 1 (0.8) | 1 (2.3) | 0 | .19 |
| Chronic renal failure | 1 (0.3) | 0 | 0 | 2 (0.9) | .61 |
| Clinical characteristics | |||||
| Non–ST-segment elevation AMI | 19 (6.6) | 6 (4.6) | 1 (2.3) | 19 (8.3) | .35 |
| Killip class 3-4 | 11 (3.8) | 11 (8.4) | 2 (4.5) | 6 (2.6) | .07 |
| Inferior wall AMI | 124 (43.2) | 54 (41.2) | 19 (43.2) | 86 (37.6) | .62 |
| Anterior wall AMI | 51 (17.8) | 22 (16.8) | 12 (27.3) | 36 (15.7) | .33 |
| Heart failure on admission | 66 (23.0) | 37 (28.2) | 8 (18.2) | 50 (21.8) | .44 |
| Ischemia >20 min | 228 (79.4) | 96 (73.3) | 29 (65.9) | 162 (70.7) | .07 |
| Ejection fraction <40% | 17 (5.9) | 9 (6.9) | 2 (4.5) | 17 (7.4) | .85 |
| Coronary artery bypass grafting during index hospitalization | 11 (3.8) | 5 (3.8) | 1 (2.3) | 10 (4.4) | .93 |
| Percutaneous coronary intervention during index hospitalization | 208 (72.5) | 106 (80.9) | 32 (72.7) | 177 (77.3) | .25 |
| Length of stay, median (IQR), d | 10.0 (8.0-14.0) | 12.0 (8.0-16.0) | 10.5 (7.0-15.5) | 10.0 (7.0-14.0) | .04 |
| In-hospital complications | |||||
| Recurrent angina | 92 (32.1) | 36 (27.5) | 10 (22.7) | 43 (18.8) | .008 |
| Recurrent AMI | 6 (2.1) | 2 (1.5) | 1 (2.3) | 0 | .19 |
| Atrial fibrillation | 10 (3.5) | 3 (2.3) | 1 (2.3) | 3 (1.3) | .47 |
| Cardiopulmonary resuscitation | 4 (1.4) | 1 (0.8) | 0 | 2 (0.9) | .80 |
| Ventricular tachycardia | 22 (7.7) | 10 (7.6) | 2 (4.5) | 8 (3.5) | .20 |
| Ventricular fibrillation | 5 (1.7) | 2 (1.5) | 0 | 7 (3.1) | .49 |
| New-onset heart failure | 14 (4.9) | 14 (10.7) | 2 (4.5) | 17 (7.4) | .15 |
| Infection | 42 (14.6) | 26 (19.8) | 6 (13.6) | 21 (9.2) | .04 |
| Stroke | 11 (3.8) | 1 (0.8) | 0 | 4 (1.7) | .13 |
| Bleeding | 26 (9.1) | 18 (13.7) | 5 (11.4) | 18 (7.9) | .31 |
| Region | |||||
| Central | 144 (50.2) | 71 (54.2) | 22 (50.0) | 120 (52.4) | .78 |
| East | 112 (39.0) | 44 (33.6) | 18 (40.9) | 91 (39.7) | |
| West | 31 (10.8) | 16 (12.2) | 4 (9.1) | 18 (7.9) | |
| Urban | 203 (70.3) | 126 (96.2) | 34 (77.3) | 192 (83.8) | <.001 |
| Hospital type | |||||
| Teaching hospital | 193 (67.3) | 97 (74.1) | 33 (75.0) | 184 (80.4) | .01 |
| Tertiary hospital | 219 (76.3) | 125 (95.4) | 34 (77.3) | 202 (88.2) | <.001 |
Abbreviations: AMI, acute myocardial infarction; IQR, interquartile range; NA, not applicable; RMB, renminbi.