Table 3 Comparison of perioperative features between train-validation and test sets
Features | Train-validation set (n = 208) | Test set (n = 53) | P-value |
|---|---|---|---|
Preoperative Assessment | |||
ASA classification | 0.82 | ||
ASA 1 | 36 (17.3%) | 9 (17.0%) | |
ASA 2 | 155 (74.5%) | 41 (77.4%) | |
ASA 3 | 17 (8.2%) | 3 (5.7%) | |
Leukocyte count (x103/mm3) | 6.5 ± 1.7 | 6.9 ± 2.4 | 0.22 |
Hemoglobin (g/dL) | 13.1 ± 1.6 | 13.1 ± 1.8 | 0.86 |
Blood glucose (mg/dL) | 126.1 ± 40.9 | 127.9 ± 38.8 | 0.76 |
BUN (mg/dL) | 17.5 ± 5.6 | 18.0 ± 5.5 | 0.57 |
Serum creatinine (mg/dL) | 0.9 ± 0.5 | 0.9 ± 0.6 | 0.39 |
eGFR (mL/min) | 83.0 ± 24.1 | 80.3 ± 19.9 | 0.41 |
Total cholesterol (mg/dL) | 175.1 ± 42.5 | 171.2 ± 39.5 | 0.61 |
Serum protein (g/dL) | 7.8 ± 7.1 | 8.2 ± 8.7 | 0.77 |
Serum albumin (g/dL) | 4.3 ± 1.9 | 4.1 ± 0.3 | 0.30 |
AST (IU/L) | 26.0 ± 16.9 | 25.2 ± 9.0 | 0.63 |
ALT (IU/L) | 23.9 ± 18.9 | 23.4 ± 12.7 | 0.82 |
Operation Characteristics | |||
Spine fusion | 0.08 | ||
No | 44 (21.2%) | 18 (34.0%) | |
Yes | 164 (78.8%) | 35 (66.0%) | |
Number of involved vertebra levels | 0.40 | ||
1 | 100 (48.1%) | 21 (39.6%) | |
2 | 63 (30.3%) | 21 (39.6%) | |
3 | 45 (21.6%) | 11 (20.8%) | |
Output Variables | |||
General/surgical complications within 30 days | 1.00 | ||
No | 186 (89.4%) | 48 (90.6%) | |
Yes | 22 (10.6%) | 5 (9.4%) | |
General complications within 30 days | 1.00 | ||
No | 192 (92.3%) | 49 (92.5%) | |
Yes | 16 (7.7%) | 4 (7.5%) | |
Transfusion during hospitalization | 0.39 | ||
No | 142 (68.3%) | 40 (75.5%) | |
Yes | 66 (31.7%) | 13 (24.5%) |