Table 5. Comparison of variables between lost to follow-up and the rest of patients.
| Variables | Available (n=569) | Lost to follow-up (n=49) | P value |
|---|---|---|---|
| Preoperative variables | |||
| Demographics | |||
| Age (year) | 51.5±13.1 | 51.1±11.0 | 0.763 |
| Male (%) | 420 (73.8) | 37 (75.5) | 0.795 |
| BMI (kg/m2) | 25.2±5.2 | 26.5±4.1 | 0.219 |
| Medical history | |||
| Hypertension (%) | 383 (67.3) | 36 (73.5) | 0.376 |
| Diabetes mellitus (%) | 11 (1.9) | 0 (0) | 1.000 |
| Previous cardiac surgery (%) | 31 (5.4) | 0 (0) | 0.162 |
| Previous coronary artery disease (%) | 18 (3.2) | 0 (0) | 0.386 |
| Cerebrovascular disease (%) | 19 (3.3) | 0 (0) | 0.388 |
| LVEF (%) | 55.0±6.4 | 56.2±8.3 | 0.555 |
| Pericardial effusion (%) | 19 (3.3) | 1 (2.0) | 1.000 |
| BP at admission | |||
| SBP (mmHg) | 137.0±23.6 | 138.6±22.0 | 0.647 |
| DBP (mmHg) | 82.4±13.3 | 86.4±13.6 | 0.053 |
| Mean BP (mmHg) | 100.6±15.7 | 103.8±15.0 | 0.166 |
| Preoperative laboratory data | |||
| WBC (109/L) | 10.9±4.1 | 10.6±3.7 | 0.589 |
| sCr (μmol/L) | 102.1±84.9 | 95.0±53.2 | 0.563 |
| PLT (109/L) | 146.6±65.1 | 145.1±65.5 | 0.880 |
| Fibrinogen (g/L) | 2.6±1.3 | 2.7±1.3 | 0.835 |
| Triglyceride (mmol/L) | 1.3±1.0 | 1.4±1.6 | 0.312 |
| Preoperative CTA | |||
| Left renal artery: true lumen (%) | 313 (63.7) | 24 (63.2) | 0.966 |
| Right renal artery: true lumen (%) | 371 (75.6) | 29 (76.3) | 1.000 |
| Operative variables | |||
| TAR (%) | 298 (52.4) | 27 (55.1) | 0.714 |
| CABG/MVR/MVP/TVP (%) | 44 (7.7) | 8 (16.3) | 0.055 |
| Aortic valve (%) | 176 (30.9) | 15 (30.6) | 0.963 |
| CPB time (min) | 236.0±245.9 | 245.9±60.5 | 0.299 |
| Posterior parallel circulation time (min) | 54.1±29.2 | 61.3±38.0 | 0.113 |
| Aortic cross-clamp time (min) | 165.6±55.4 | 170.7±52.2 | 0.537 |
| DHCA time (min) | 28.1±12.9 | 27.3±13.8 | 0.664 |
| Postoperative variables | |||
| Drainage volume 24 hours after surgery (mL) | 700.7±601.0 | 725.0±629.3 | 0.792 |
| Ventilation time (hour) | 34.3±49.2 | 27.2±24.6 | 0.421 |
| ICU stay time (day) | 6.9±11.9 | 6.1±4.9 | 0.633 |
| Hospital stay time (day) | 23.7±11.4 | 24.5±14.6 | 0.654 |
Data presented as n (%); mean ± standard deviation. BMI, body mass index; LVEF, left ventricular ejection fraction; LVEF, left ventricular ejection fraction; BP, blood pressure; SBP, systolic blood pressure; DBP, diastolic blood pressure; WBC, white blood cell; PLT, platelet; SCr, serum creatinine; PLT, platelet; CTA, computed tomography angiography; TAR, total arch replacement; CABG, coronary artery bypass graft; MVR, mitral valve replacement; MVP, mitral valvuloplasty; TVP, tricuspid valvuloplasty; CPB, cardiopulmonary bypass; DHCA, hypothermic circulatory arrest; ICU, intensive care unit.