Table 1.
Patients’ baseline characteristics and clinical presentation on admission for young patients compared to older patients.
| Demographics | Young (n=1595) | Old (n=8673) | P value |
|---|---|---|---|
|
| |||
| Age (yr) Mean (SD) | 42.8 (5.9) | 59.6 (8.5) | |
| Gender, n (%) | |||
| Male | 1102 (69.1) | 7258 (83.7) | <.001 |
| Female | 493 (30.9) | 1415 (16.3) | |
| Ethnicity, n (%) | |||
| Malay | 826 (51.8) | 4042 (46.6) | <.001 |
| Chinese | 257 (16.1) | 2219 (25.6) | |
| Indian | 402 (25.2) | 1916 (22.1) | |
| Others | 109 (6.8) | 493 (5.7) | |
| Unknown | 1 (0.1) | 3 (0.0) | |
| BMI, kg/m2, n (%) | |||
| Overweight (≥25 kg/m2 to <30 kg/m2) | 532 (33.4) | 2896 (42.6) | <.001 |
| Obese (≥30 kg/m2) | 334 (20.9) | 1175 (17.3) | |
| Risk factors, n (%) | |||
| Smoking | |||
| Former (quit >30 d) | 360 (22.6) | 2478 (28.6) | <.001 |
| Current (any tobacco use within last 30 d) | 481(30.2) | 1539 (17.7) | |
| Diabetes | 669 (41.9) | 4018 (46.3) | .001 |
| Hypertension | 966 (60.6) | 6523 (75.2) | <.001 |
| Dyslipidemia | 1157 (72.5) | 6348 (73.2) | .55 |
| Premorbid conditions, n (%) | |||
| Cerebrovascular disease | 15 (0.9) | 145 (1.7) | .03 |
| Peripheral vascular disease | 9 (0.6) | 93 (1.1) | .06 |
| Chronic renal failure | 72 (4.5) | 593 (6.8) | <.001 |
| New onset angina (<2 wk) | 387 (24.3) | 2198 (25.4) | .32 |
| Congestive heart failure | 49 (3.1) | 374 (4.3) | .02 |
| Myocardial infarction history | 732 (45.9) | 3473 (40.1) | <.001 |
| Previous intervention, n (%) | |||
| Previous PCI | 181 (11.3) | 1352 (15.6) | <.001 |
| Previous CABG | 9 (0.6) | 398 (4.6) | <.001 |
PCI: Percutaneous coronary intervention, CABG: coronary artery bypass graft, BMI: body mass index.
P values were calculated for comparisons between young and old, comparing all subcategories except the unknown subcategory for all variables; All P values were calculated using the chi-square test unless stated; pPercentages for each variable were calculated from the respective totals that included the unknown category apart from the YES and NO categories.