Table 1 Characteristics of the study patients based on age group
|  | Overall (n = 469) | 65 years of age and older (n = 202) | Younger than 65 years of age (n = 267) | p |
|---|---|---|---|---|
Age, years | 62.4 ± 9.7 | 71 ± 5 | 56 ± 6.9 | < 0.001 |
Gender, female, n (%) | 142 (30.3) | 67 (33.2) | 75 (28.1) | 0.264 |
Married | 442 (94.2) | 187 (92.6) | 255 (95.5) | 0.229 |
Educational level | Â | Â | Â | Â |
 Junior high school or lower | 166 (35.4) | 91 (45.0) | 75 (28.1) | < 0.001 |
 Senior high school | 198 (42.2) | 86 (42.6) | 112 (41.9) |  |
 University/college | 105 (22.4) | 25 (12.4) | 80 (30.0) |  |
Manual laborer | 48 (10.2) | 26 (12.9) | 22 (8.2) | 0.101 |
Employed | 178 (38) | 7 (3.5) | 171 (64) | < 0.001 |
Income (Chinese yuan/month) | Â | Â | Â | Â |
 1,200 - 3,000 | 248 (52.9) | 156 (77.2) | 92 (34.5) | < 0.001 |
 3,000 - 5,000 | 166 (35.4) | 27 (13.4) | 139 (52.1) |  |
 ≥ 5,000 | 55 (11.7) | 19 (9.4) | 36 (13.5) |  |
Basic medical insurance* | 391 (83.4) | 162 (80.2) | 229 (85.8) | 0.109 |
Live alone | 29 (6.2) | 20 (9.9) | 9 (3.4) | 0.004 |
Currently smoking | 111 (23.7) | 45 (22.3) | 66 (24.7) | 0.538 |
Regular alcohol use | 30 (6.4) | 12 (5.9) | 18 (6.7) | 0.726 |
Depressive symptoms (PHQ score) | 4 (2–7) | 4 (2–6) | 5 (3–7) | 0.005 |
No. of diseased vessels | 1 (1–2) | 1 (1–2) | 1 (1–2) | 0.107 |
Comorbidities | Â | Â | Â | Â |
 Congestive heart failure | 37 (7.9) | 27 (13.4) | 10 (3.7) | < 0.001 |
 Diabetes | 103 (22.0) | 57 (28.2) | 46 (17.2) | 0.004 |
 Hypertension | 262 (55.9) | 122 (60.4) | 140 (52.4) | 0.086 |
 Dyslipidemia | 84 (17.9) | 49 (24.3) | 35 (13.1) | 0.002 |
 Cardiac dysrhythmias | 31 (6.6) | 18 (8.9) | 13 (4.9) | 0.081 |
 Stroke | 27 (5.8) | 17 (8.4) | 10 (3.7) | 0.032 |
 Any previous revascularization | 36 (7.7) | 21 (10.4) | 15 (5.6) | 0.054 |
 Chronic renal failure | 38 (8.1) | 24 (11.9) | 14 (5.2) | 0.009 |
 COPD | 29 (6.2) | 19 (9.4) | 10 (3.7) | 0.012 |
 Gastrointestinal disease | 48 (10.2) | 27 (13.4) | 21 (7.9) | 0.052 |
 Others | 45 (9.6) | 29 (14.4) | 16 (6.0) | 0.002 |
In-hospital treatment (PCI/CABG) | 444 (94.7) | 190 (94.1) | 254 (95.1) | 0.609 |
Time between discharge and follow-up survey, months | 19.5 ± 2.6 | 19.3 ± 2.6 | 19.7 ± 2.6 | 0.161 |
Number of outpatient cardiologist visits since hospital discharge | 7 (5–9) | 6 (4–8) | 8 (6–10) | < 0.001 |
Rehospitalization since discharge# | 0 (0–1) | 0 (0–1) | 0 (0–1) | 0.092 |
Medication use at discharge | Â | Â | Â | Â |
 Aspirin | 445 (94.9) | 188 (93.1) | 257 (96.5) | 0.121 |
 Beta-blocker | 420 (89.6) | 175 (86.6) | 245 (91.8) | 0.072 |
 Statin | 414 (88.3) | 172 (85.1) | 242 (90.6) | 0.067 |
 ACE inhibitor/ARB | 319 (68.0) | 135 (66.8) | 184 (68.9) | 0.632 |
Number of prescribed medications§ | 6 (5–10) | 8 (5–12) | 5 (4–7) | < 0.001 |