Table 1.
Baseline demographic and clinical characteristics.
| Variables | 1st group (n = 401) | 2nd group (n = 400) | 3rd group (n = 402) | p value |
|---|---|---|---|---|
| Age (years) | 61 ± 13 | 62 ± 12 | 65 ± 13 | <0.001 |
| Male | 320 (79.8%) | 313 (78.3%) | 283 (70.4%) | 0.004 |
| Smoking history | 266 (66.3%) | 247 (61.8%) | 223 (55.5%) | 0.007 |
| Family history of CAD | 113 (28.2%) | 118 (29.6%) | 82 (20.4%) | 0.006 |
| Hypertension | 221 (55.1%) | 242 (60.5%) | 239 (59.6%) | 0.253 |
| Diabetes | 123 (30.7%) | 137 (34.3%) | 140 (34.9%) | 0.391 |
| Hyperlipidemia | 119 (29.9%) | 132 (33.1%) | 144 (36.1%) | 0.178 |
| SBP (mmHg) | 132 ± 22 | 133 ± 22 | 133 ± 22 | 0.505 |
| DBP (mmHg) | 78 ± 15 | 79 ± 15 | 78 ± 15 | 0.789 |
| Heart rate (/min) | 76 ± 16 | 76 ± 17 | 77 ± 16 | 0.491 |
| LVEF (%) | 56.76 ± 9.87 | 57.57 ± 10.62 | 56.33 ± 10.03 | 0.236 |
| GRACE score | 147 ± 37 | 151 ± 83 | 157 ± 62 | 0.086 |
| High risk group | 197 (54.0%) | 197 (52.3%) | 232 (64.1%) | 0.002 |
| BMI (kg/m2) | 26.37 ± 14.25 | 25.60 ± 3.53 | 28.05 ± 52.74 | 0.538 |
| Killip class | 0.401 | |||
| I | 226 (56.4%) | 214 (53.5%) | 214 (53.2%) | |
| II | 140 (34.9%) | 161 (40.3%) | 159 (39.6%) | |
| III | 23 (5.7%) | 20 (5.0%) | 23 (5.7%) | |
| IV | 12 (3.0%) | 5 (1.3%) | 6 (1.5%) | |
| Degree of pain reliefa (%) | 60.14 ± 33.94 | 63.72 ± 33.03 | 66.90 ± 33.62 | 0.026 |
| The time of symptom onset to admission over 12 h (%) | 113 (29%) | 138 (36.1%) | 141 (37.8%) | 0.025 |
| Days in hospital | 10 (8-13) | 10 (8-13) | 10 (8-14) | 0.898 |
| In-hospital mortality | 10 (2.5%) | 18 (4.5%) | 22 (5.5%) | 0.099 |
aCompared with the highest degree of pain.
Data are shown as mean ± standard deviation or n (%). Data in bold indicate p-values ≤ 0.05.
BMI, body mass index; DBP, diastolic blood pressure; SBP, systolic blood pressure; LVEF, left ventricular eject fraction; CAD, coronary artery disease; GRACE score, global registry of acute coronary events score.