Table 5.
Clinical baseline characteristics of the training set and the validation set
| Training set (n = 218) | Validation set (n = 94) | t/x2 | P | |
|---|---|---|---|---|
| Age | 1.921 | 0.166 | ||
| <35 years | 152 (69.7%) | 58 (61.7%) | ||
| ≥35 years | 66 (30.3%) | 36 (38.3%) | ||
| BMI | 0.590 | 0.443 | ||
| ≥22 | 171 (78.4%) | 70 (74.5%) | ||
| <22 | 47 (21.6%) | 24 (25.5%) | ||
| Fasting time | 0.010 | 0.921 | ||
| <16 h | 175 (80.1%) | 75 (74.5%) | ||
| ≥16 h | 43 (19.9%) | 19 (25.5%) | ||
| Preoperative infusion volume | 1.704 | 0.192 | ||
| <500 | 164 (75.2%) | 64 (68.1%) | ||
| ≥500 | 54 (24.8%) | 30 (31.9%) | ||
| Diabetes | 0.016 | 0.899 | ||
| Had | 45 (20.6%) | 20 (21.3%) | ||
| No | 173 (79.4%) | 74 (78.7%) | ||
| Hypertension | 0.456 | 0.499 | ||
| Had | 18 (8.3%) | 6 (6.4%) | ||
| No | 190 (91.7%) | 88 (93.6%) | ||
| Coronary heart disease | 0.010 | 0.921 | ||
| Had | 43 (19.9%) | 19 (20.2%) | ||
| No | 175 (80.1%) | 75 (79.8%) | ||
| Anemia | 0.702 | 0.402 | ||
| Had | 104 (47.7%) | 40 (42.6%) | ||
| No | 114 (52.3%) | 54 (57.4%) | ||
| Hypoproteinemia | 3.901 | 0.048 | ||
| Had | 110 (50.5%) | 36 (38.3%) | ||
| No | 108 (49.5%) | 58 (61.7%) | ||
| Electrolyte disturbance | 0.156 | 0.692 | ||
| Had | 112 (51.4%) | 46 (48.9%) | ||
| No | 106 (48.6%) | 48 (51.1%) | ||
| Basal HR | 3.583 | 0.060 | ||
| ≥95 | 162 (74.3%) | 79 (84%) | ||
| <95 | 56 (25.7%) | 15 (16%) | ||
| Basal SBP | 0.293 | 0.588 | ||
| ≥125 | 107 (49.1%) | 43 (45.7%) | ||
| <125 | 111 (50.9%) | 51 (54.3%) | ||
| Basal PVI | 0.686 | 0.407 | ||
| ≥19 | 133 (61.0%) | 62 (66.0%) | ||
| <19 | 85 (39.0%) | 32 (34.0%) | ||
| Basal DBP | 0.241 | 0.623 | ||
| ≥70 | 104 (47.7%) | 42 (44.7%) | ||
| <70 | 114 (52.3%) | 52 (55.3%) | ||
| Basal MAP | 0.898 | 0.343 | ||
| ≥80 | 124 (56.9%) | 48 (51.1%) | ||
| <80 | 94 (43.1%) | 46 (48.9%) |
Note: HR, heart rate; SBP, systolic blood pressure; PVI, pulse perfusion variability index; DBP, diastolic blood pressure; MAP, mean artery pressure.