Table 3. Comparison of clinical events between patients with and without PPS.
| Clinical Feature | PPS (n = 49) | No PPS (n = 26) | P Value |
| Age [years] mean (SD) | 66.54 (8.14) | 64.75 (9.81) | 0.16 |
| Age [years] median | 66 | 62.5 | |
| Gender | |||
| Female [number (%)] | 12 (75%) | 4 (25%) | 0.16 |
| Male [number (%)] | 37 (63%) | 22 (37%) | |
| BMI [kg/m2] | |||
| mean (SD) | 27.79 (3.53) | 27 (3.65) | 0.39 |
| median | 26.97 | 26.46 | |
| Surgery duration [h] | |||
| mean (SD) | 3.97 (1.28) | 3.48 (1.2) | 0.12 |
| median | 3.5 | 3.5 | |
| Number of by-passes | |||
| mean (SD) | 2.35 (0.85) | 2.27 (0.94) | 0.72 |
| median | 2 | 2 | |
| Hb before surgery [g/dl] | |||
| mean (SD) | 13.23 (1.7) | 14.25 (1.27) | 0.01 |
| median | 13.7 | 14 | |
| Hb after surgery [g/dl] | |||
| mean (SD) | 11.15 (1.36) | 11.02 (1.03) | 0.78 |
| median | 11 | 11 | |
| Type of surgery | |||
| ECC+ [number (%)] | 14 (28.6) | 11 (42.3) | 0.23 |
| ECC− [number (%)] | 35 (71.4) | 15 (57.7) | |
| Hypertension [number (%)] | 38 (77.6) | 20 (76.9) | 0.21 |
| Diabetes mellitus [number (%)] | 16 (32.7) | 10 (38.5) | 0.18 |
| Hypercholesterolemia [number (%)] | 27 (55.1) | 17 (65.4) | 0,12 |
| Heart failure EF<60% [number (%)] | 19 (38,8) | 14 (53,8) | 0,1 |
| Chronic Renal Disease [number (%)] | 15 (30,6) | 6 (23) | 0,17 |
| MI history [number (%)] | 20 (40,8) | 13 (50) | 0,16 |
| Tobacco use [number (%)] | 8 (16) | 6 (23) | 0,12 |
| Red Blood Cells Transfusion [number (%)] | 30 (61) | 13 (50) | 0,33 |
BMI-Body Mass Index, Hb-Hemoglobin, ECC- extracorporeal circulation, CABG-Coronary Artery Bypass Graft, MI-myocardial infarction, HF-Heart Failure, EF-Ejection Fraction, SD- Standard Deviation, PPS-patients with the postpericardiotomy syndrome, No PPS- patients without the postpericardiotomy syndrome.