Table 1. Baseline characteristics of the 4 study groups.
| All | Underweight (BMI < 18.5) | Normal weight (18.5 ≤ BMI < 24) | Overweight (24 ≤ BMI < 27) | Obese (BMI ≥ 27) | ||
| (n = 1298) | (Group 1, n = 52) | (Group 2, n = 477) | (Group 3, n = 428) | (group 4, n = 340) | p value | |
| Age, years | 63.6 ± 4.5 | 77.8 ± 11.0 | 67.74 ± 3.6 | 61.9 ± 13.7 | 57.9 ± 14.5 | < 0.001*† ‡ § #** |
| Male | 1074 (82.7%) | 42 (80.8%) | 382 (80.1%) | 361 (84.3%) | 289 (85%) | 0.23 |
| Hypertension | 717 (55.2%) | 29 (55.7%) | 255 (53.5%) | 239 (55.8%) | 194 (56.2%) | 0.94 |
| Diabetes mellitus | 463 (35.7%) | 20 (38.5%) | 175 (36.7%) | 156 (36.4%) | 112 (32.9%) | 0.66 |
| Current smoker | 533 (41.0%) | 25 (48.1%) | 210 (44.0%) | 173 (40.4%) | 124 (36.5%) | 0.12 |
| Previous CAD | 83 (6.4%) | 4 (7.7%) | 33 (6.9%) | 25 (5.8%) | 21 (6.2%) | 0.84 |
| Previous cerebral events | 82 (6.3%) | 5 (9.6%) | 24 (5.0%) | 31 (7.2%) | 22 (6.5%) | 0.48 |
| Gout | 94 (7.2%) | 5 (9.6%) | 37 (7.8%) | 23 (5.4%) | 29 (8.5%) | 0.28 |
| STEMI | 855 (65.9%) | 29 (55.8%) | 301 (63.1%) | 291 (68.0%) | 234 (68.8%) | 0.32 |
| Killip class ≥ 2 | 728 (56%) | 39 (75%) | 277 (58.1%) | 242 (56.5%) | 170 (50%) | 0.004 |
| Medication at discharge | ||||||
| Aspirin | 1289 (99.3%) | 51 (98.1%) | 474 (99.4%) | 426 (99.5%) | 338 (99.4%) | 0.75 |
| Clopidogrel | 1282 (98.8%) | 52 (100%) | 471 (98.7%) | 427 (99.8%) | 332 (97.6%) | 0.1 |
| β-blockers | 1116 (86.0%) | 46 (88.5%) | 398 (83.4%) | 373 (87.1%) | 299 (87.9%) | 0.24 |
| ACEIs/ARBs | 1143 (88.1%) | 45 (86.5%) | 408 (88.5%) | 381 (89.0%) | 309 (90.9%) | 0.12 |
| Statins | 633 (48.8%) | 14 (26.9%) | 198 (41.5%) | 213 (49.8%) | 208 (61.2%) | < 0.001 |
Category data were expressed as patients number and percentage; continuous data were expressed as mean ± SD.
ACEI, angiotensin converting enzyme inhibitor; ARB, angiotensin II receptor blocker; BMI, body mass index; CAD, coronary artery disease or myocardial infarction; STEMI, ST-segment-elevation myocardial infarction.
* Statistical significance between underweight group and normal weight group; † Statistical significance between underweight group and overweight group; ‡ Statistical significance between underweight group and normal BMI group; § Statistical significance between normal weight group and overweight group; # Statistical significance between normal weight group and obese group;
** Statistical significance between overweight group and obese group.