Table 2 Univariate analysis of the nondelirium group and delirium group in the training set (demographic characteristics)
From: Prediction model for delirium in patients with cardiovascular surgery: development and validation
Variable | Total | Non-delirium group | Delirium group | \(\chi ^{2}\)/t | P |
|---|---|---|---|---|---|
n (%)/\({\bar{x}} \pm s\) | n (%)/\({\bar{x}} \pm s\) | n (%)/\({\bar{x}} \pm s\) | |||
Gender | 0.004 | 0.948 | |||
Male | 232 (59.6) | 119 (59.8) | 113 (59.5) | ||
Female | 157 (40.4) | 80 (40.2) | 77 (40.5) | ||
Age | 59.8 ± 11.2 | 58.5 ± 12.3 | 61.1 ± 9.9 | −2.296 | 0.022* |
BMI | 24.0 ± 3.4 | 24.1 ± 3.4 | 23.9 ± 3.4 | 0.638 | 0.524 |
Blood type | 0.957 | 0.812 | |||
A | 133 (34.2) | 64 (32.2) | 69 (36.3) | ||
B | 107 (27.5) | 55 (27.6) | 52 (27.4) | ||
AB | 33 (8.5) | 17 (8.5) | 16 (8.4) | ||
O | 116 (29.8) | 61 (31.7) | 53 (27.9) | ||
Past history | |||||
Hypertension | 175 (45.0) | 91 (45.7) | 84 (44.2) | 0.091 | 0.764 |
Diabetes | 63 (16.2) | 32 (16.1) | 31 (16.3) | 0.004 | 0.950 |
Stroke | 23 (5.9) | 15 (7.5) | 8 (4.2) | 1.934 | 0.164 |
Atrial fibrillation | 92 (23.7) | 46 (23.1) | 46 (24.2) | 0.065 | 0.799 |
Malignant tumor | 15 (3.9) | 7 (3.5) | 8 (4.2) | 0.126 | 0.723 |