Table 1 Baseline characteristics of the 4 quartiles
Variables | Quartile 1 (N = 334) | Quartile 2 (N = 336) | Quartile 3 (N = 258) | Quartile 4 (N = 273) | P value |
|---|---|---|---|---|---|
Age (years)—mean (SD) | 57 (10) | 56 (10) | 56 (10) | 58 (10) | 0.7 |
Male-N (%) | 265 (79) | 278 (83) | 223 (86) | 226 (83) | 0.6 |
Smoking—N (%) | 259 (78) | 273 (81) | 207 (80) | 195 (71) | 0.04 |
DM—N (%) | 25 (7) | 39 (12) | 32 (12) | 49 (18) | 0.04 |
HTN—N (%) | 119 (36) | 125 (37) | 87 (34) | 122 (45) | 0.05 |
Creatinine (mg/dl)—mean (SD) | 1.1 (0.3) | 1.1 (0.3) | 1.1 (0.2) | 1.2 (0.3) | 0.8 |
Platelets (per ml)—mean (SD) | 289 (83) | 282 (62) | 281 (81) | 288 (83) | 0.9 |
Haemoglobin (mg/dl)—mean (SD) | 14.8 (1.4) | 14.9 (1.3) | 15 (1.4) | 15 (1.4) | 0.8 |
Anterior MI—N (%) | 161 (48) | 157 (47) | 131 (51) | 164 (60) | < 0.001 |
Ejection fraction (%)—Median (IQR) | 51 (44–59) | 50 (42–57) | 47 (39–54) | 45 (35–51) | 0.001 |
End-diastolic volume (ml)—median (IQR) | 112 (91–139) | 124 (104 –149) | 129 (102–160) | 129 (104–159) | < 0.001 |
End-systolic volume (ml)—median (IQR) | 54 (41–71) | 63 (48–79) | 68 (50–89) | 72 (53–90) | < 0.001 |
Cardiac output (ml)—median (IQR) | 4.4 (3.4–6) | 4.5 (3.6–5.9) | 4.6 (3.5–6.1) | 4.4 (3.1–5.9) | 0.5 |