Table 1 Clinical characteristics of the population in development and validation sets
Variables | Number(percentage,%) | P-value | |
|---|---|---|---|
Development set (n=16753) | Validation set (n=7264) | ||
PLOS/non-PLOS | 4166(24.9)/ 12587(75.1) | 1797(24.7)/ 5467(75.3) | 0.833 |
Sex (M/F) | 8340(49.8)/ 8413(50.2) | 3629(50.0)/ 3635(50.0) | 0.811 |
Year (yr) <55/≥55 | 7340(43.8)/ 9413(56.2) | 3199(44.0)/ 4065(56.0) | 0.755 |
BMI | Â | Â | 0.947 |
 <21kg/m2 | 4159(24.8) | 1791(24.7) |  |
 21-25 kg/m2 | 7936(47.4) | 3456(47.6) |  |
 >25 kg/m2 | 4658(27.8) | 2017(27.8) |  |
ASA | Â | Â | 0.059 |
 I/II | 3543(21.1)/ 12457(74.4) | 1519(20.9)/ 5455(75.1) |  |
 III/IV | 742(4.4)/ 11(0.1) | 280(3.9)/ 10(0.1) |  |
Surgery | Â | Â | 0.781 |
 Minor surgery | 1732(10.3) | 759(10.4) |  |
 Moderate surgery | 10831(64.7) | 4662(64.2) |  |
 Major surgery | 4190(25.0) | 1843(25.4) |  |
Chill, yes | 568(3.4) | 267(3.7) | 0.283 |
Delirium, yes | 1079(6.4) | 477(6.6) | 0.732 |
Pain, yes | 308(1.8) | 121(1.7) | 0.368 |
Temperature | Â | Â | 0.073 |
 <36.2℃ | 4191(25.0) | 1720(23.7) |  |
 36.2-36.7℃ | 9341(55.8) | 4145(57.1) |  |
 >36.7℃ | 3221(19.2) | 1399(19.3) |  |
 Naloxone | 54(0.3) | 29(0.4) | 0.402 |
Neostigmine | 11032(65.9) | 4871(67.1) | 0.07 |
Hyperglycemia | 2363(14.1) | 1100(15.1) | 0.036 |
Hypertension | 6399(38.2) | 2754(37.9) | 0.686 |
PLOD | Â | Â | 0.494 |
 <110 min/≥110 min | 9717(58.0)/ 7036(42.0) | 4248(58.5)/ 3016(41.5) |  |
Blood transfusion | 1089(6.5) | 474(6.5) | 0.955 |
 RBC | 598(3.6) | 262(3.6) |  |
 Plasma | 799(4.8) | 334(4.6) |  |
 Pt | 19(0.1) | 8(0.1) |  |
 Cryo | 6(0.0) | 2(0.0) |  |
 Whole blood | 2(0.0) | 0(0.0) |  |
 Autologous blood | 275(1.6) | 125(1.7) |  |
Patients with tracheal tube discharged from PACU | 13(0.0) | 5(0.0) | 0.820 |