Table 1.
Baseline characteristics of study patients
| Clinical characteristics | Oxygenation treatment (n = 100) | Control (n = 100) | P value |
|---|---|---|---|
| Age, yr | 73.8 ± 8.3 | 74.6 ± 8.1 | 0.49 |
| Male sex, n (%) | 66 (66.0%) | 64 (64.0%) | 0.77 |
| Body mass index | 23.1 ± 4.0 | 24.0 ± 4.1 | 0.12 |
| Diabetes, n (%) | 30 (30.0%) | 38 (38.0%) | 0.23 |
| Hypertension, n (%) | 85 (85.0%) | 86 (86.0%) | 0.84 |
| Dyslipidemia, n (%) | 63 (63.0%) | 66 (66.0%) | 0.66 |
| Current smoking, n (%) | 6 (6.0%) | 6 (6.0%) | 1.00 |
| Prior CABG, n (%) | 4 (4.0%) | 4 (4.0%) | 1.00 |
| Prior PCI, n (%) | 27 (27.0%) | 31 (31.0%) | 0.53 |
| History of myocardial infarction, n (%) | 15 (15.0%) | 19 (19.0%) | 0.45 |
| Volume of contrast medium (ml) | 109 ± 48 | 110 ± 56 | 0.89 |
| Procedure time (min) | 47 ± 35 | 48 ± 34 | 0.84 |
| Medications | |||
| ACE inhibitors, n (%) | 9 (9.0%) | 10 (10.0%) | 0.81 |
| Angiotensin II receptor inhibitors, n (%) | 49 (49.0%) | 54 (54.0%) | 0.48 |
| Calcium channel blocker, n (%) | 31 (31.0%) | 38 (38.0%) | 0.29 |
| β-Blockers | 36 (36.0%) | 34 (34.7%) | 0.77 |
| Aspirin, n (%) | 59 (59.0%) | 60 (60.0%) | 0.89 |
| Statins, n (%) | 49 (49.0%) | 53 (53.0%) | 0.57 |
| Diuretics, n (%) | 35 (35.0%) | 37 (37.0%) | 0.77 |
| Laboratory tests | |||
| Serum creatinine (mg/dl) | 1.08 ± 0.21 | 1.08 ± 0.25 | 1.00 |
| Cystatin C (mg/dl) | 1.11 ± 0.32 | 1.13 ± 0.27 | 0.63 |
| eGFR (ml/min per 1.73 m2) | 48.4 ± 9.1 | 48.6 ± 9.0 | 0.88 |
| eGFR 30–60 (%) | 95 (95.0%) | 96 (96.0%) | 0.73 |
| eGFR < 30 (%) | 5 (5.0%) | 4 (4.0%) | 0.73 |
| Blood urea nitrogen (mg/dl) | 19.6 ± 5.9 | 19.4 ± 6.8 | 0.82 |
| HbA1c (%) | 6.2 ± 3.7 | 5.9 ± 1.0 | 0.43 |
| BNP (ng/ml) | 211.7 ± 315.5 | 167.5 ± 332.2 | 0.34 |
| Procedure | |||
| Coronary artery angiography | 78 (78%) | 78 (78%) | 1.00 |
| PCI | 22 (22%) | 22 (22%) | 1.00 |
| Mehran’s risk score | 7.6 ± 3.1 | 7.0 ± 3.4 | 0.19 |
ACE, angiotensin-converting enzyme; BNP, brain natriuretic peptide; CABG, coronary artery bypass graft; eGFR, estimated glomerular filtration rate; HbA1c, hemoglobin A1c; LVEF, left ventricular ejection fraction; PCI, percutaneous coronary intervention.