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Table 5 Baseline characteristics according to preoperative leukocyte count
| Leukocyte couNT | Quintile 1 (3100 – 5600) (n = 111) | Quintile 2 (5620 – 6500) (n =114) | Quintile 3 (6510 – 7320) (n =108) | Quintile 4 (7370 – 8580) (n = 111) | Quintile 5 (8590 – 16200) (n = 110) | Trend test |
|---|---|---|---|---|---|---|
| Mean age (SD) | 61.7 (11.2) | 60.6 (11.5) | 59.5 (11.4) | 59.8 (11.0) | 58.4 (10.7) | P = 0.01 |
| Males (%) | 67.5 | 71.9 | 79.6 | 77.4 | 72.7 | P = 0.23 |
| Residents in a city with an altitude of 2000- 3000 m (%) | 90 | 85.9 | 85.2 | 74.7 | 74.5 | P < 0.001 |
| Mean ejection fraction (%) | 53.3 (10.3) | 52.9 (11.8) | 52.4 (11.4) | 50.2 (12.6) | 51.6 (12.1) | P = 0.2 |
| Diabetes mellitus (%) | 19.8 | 15.8 | 17.8 | 18.9 | 28.2 | P = 0.10 |
| Acute coronary syndrome ≤ 30 days (%) | 42.3 | 26.3 | 32.4 | 34.2 | 35.4 | P = 0.69 |
| Obesity (%) | 15.3 | 14.0 | 23.1 | 18.9 | 18.1 | P = 0.35 |
| Previous cardiac surgery (%) | 5.4 | 7.0 | 7.4 | 5.4 | 7.2 | P = 0.78 |
| Proportion of patients undergoing CABG (%) | 69.3 | 62.2 | 67.6 | 72.9 | 77.2 | P = 0.07 |
