Table 2 Univariate analysis of risk factors for POP after AADS in the training set
Characteristic | Without POP n = 217 (%) | With POP n = 111 (%) | χ2/Z/t | P value |
|---|---|---|---|---|
Demographics | ||||
Age (years) | 48.0 ± 11.4 | 52.0 ± 10.3 | 3.067 | 0.002 |
Male | 161 (74.2) | 93 (83.8) | 3.866 | 0.049 |
Body mass index (kg/m2) | 25.3 ± 3.7 | 25.8 ± 4.0 | 1.254 | 0.211 |
Smoking history | 80 (36.9) | 58 (52.3) | 7.133 | 0.008 |
Drinking history | 72 (33.2) | 37 (33.3) | 0.001 | 0.978 |
Underlying conditions | ||||
Hypertension | 145 (66.8) | 76 (68.5) | 0.091 | 0.763 |
Diabetes mellitus | 9 (4.1) | 6 (5.4) | 0.266 | 0.606 |
Chronic obstructive pulmonary disease | 5 (2.3) | 11 (9.9) | 9.155 | 0.002 |
Cerebrovascular disease | 30 (13.8) | 23 (20.7) | 2.578 | 0.108 |
Peripheral vascular disease | 25 (11.5) | 18 (16.2) | 1.421 | 0.233 |
Renal insufficiency | 58 (26.7) | 60 (54.1) | 23.807 | < 0.001 |
Gastrointestinal tract disease | 18 (8.3) | 8 (7.2) | 0.119 | 0.730 |
Atrial fibrillation | 1 (0.5) | 1 (0.9) | 0.235 | 0.628 |
General surgery history | 45 (20.7) | 24 (21.6) | 0.035 | 0.852 |
Heart surgery history | 16 (7.4) | 9 (8.1) | 0.056 | 0.812 |
New York Heart Association class | 4.230 | 0.238 | ||
I | 137 (63.1) | 74 (66.7) | ||
II | 61 (28.1) | 24 (21.6) | ||
III | 17 (7.8) | 9 (8.1) | ||
IV | 2 (0.9) | 4 (3.6) | ||
Pulmonary artery hypertension | 7 (3.2) | 2 (1.8) | 0.558 | 0.455 |
Pericardial effusion | 68 (31.3) | 29 (26.1) | 0.957 | 0.328 |
Left ventricular ejection fraction (%) | 62 (60, 65) | 62 (60, 65) | 0.343 | 0.732 |
Laboratory values | ||||
White blood cell count (× 109/L) | 9.8 (7.3, 12.2) | 11.1 (8.2, 14.1) | 2.614 | 0.009 |
Red blood cell count (× 1012/L) | 4.2 (3.8, 4.6) | 4.2 (3.7, 4.5) | 0.126 | 0.900 |
Hemoglobin (g/l) | 128 (112, 138) | 130 (114, 139) | 0.653 | 0.514 |
Platelet count (× 109/L) | 171 (133, 218) | 143 (120, 185) | 3.409 | 0.001 |
Serum creatinine (μmol/L) | 78.5 (66.0, 104.6) | 88.2 (65.8, 129.5) | 2.218 | 0.027 |
Serum albumin (g/L) | 37.9 ± 4.3 | 37.3 ± 4.5 | 1.183 | 0.238 |
Cardiopulmonary bypass time (minutes) | 206 (169, 247) | 231 (186, 275) | 3.027 | 0.002 |
Aortic cross clamp time (minutes) | 117 (94, 142) | 126 (102, 160) | 2.177 | 0.029 |
Transfusion of red blood cells (units) | 6.5 (6, 8.5) | 8.5 (6.5, 10.5) | 4.749 | < 0.001 |