Table 1 Characteristics of study participants from training set and validation set.
Factors | Training sets N = 20,614 | Testing sets N = 8,834 | P |
|---|---|---|---|
Age (mean, y) | 65.5 ± 0.1 | 65.7 ± 0.2 | 0.090 |
Female (N, %) | 8,360(40.6) | 3,588(40.5) | 0.922 |
COPD (N, %) | 5,006(24.3) | 2,208(25.0) | 0.194 |
Diabetes (N, %) | 4,657(22.6) | 1,969(22.3) | 0.569 |
Myocardial infarct (N, %) | 3,383(16.4) | 1,452(16.4) | 0.003 |
Congestive heart failure (N, %) | 5,179(25.1) | 2,212(25.0) | 0.879 |
Peripheral vascular disease (N, %) | 2,257(10.9) | 985(11.2) | 0.613 |
Cerebrovascular disease (N, %) | 2,839(13.8) | 1,211(13.7) | 0.884 |
Dementia (N, %) | 614 (3.0) | 275 (3.1) | 0.537 |
Renal disease (N, %) | 3,735(18.1) | 1,575(17.8) | 0.553 |
Mild liver disease (N,%) | 2,202(10.7) | 905(10.2) | 0.263 |
Paraplegia (N, %) | 835(4.1) | 370(4.2) | 0.585 |
The presence of metastasis (N, %) | 1,045(5.1) | 476(5.4) | 0.257 |
AIDS (N, %) | 94(0.5) | 48(0.5) | 0.321 |
Cancer (N, %) | 2,306 | 1,014 | 0.468 |
Respiration(PaO2/FIO2) | 195.2 ± 0.7 | 195.1 ± 1.1 | 0.516 |
Glasgow score (mean) | 14.4 ± 0.01 | 14.4 ± 0.02 | 0.668 |
Hemoglobin (mean, g/L) | 9.9 ± 0.02 | 10.0 ± 0.02 | 0.434 |
Platelets count(10^6/L) | 183.1 ± 0.7 | 182.5 ± 1.1 | 0.674 |
WBC (10^9/L) | 15.2 ± 0.1 | 15.5 ± 0.1 | 0.998 |
Albumin (mean, g/L) | 3.2 ± 0.0 | 3.2 ± 0.0 | 0.809 |
Sepsis (N, %) | 13,920(67.5) | 5,948(67.3) | 0.742 |
Shock (N, %) | 2,274(11.0) | 997 (11.3) | 0.524 |
Lactate (mean, mmol/L) | 2.9 ± 0.0 | 3.0 ± 0.0 | 0.115 |
Los of ICU (mean, day) | 4.4 ± 0.0 | 4.4 ± 0.1 | 0.426 |
BMI (mean, kg/m^2) | 23.5 ± 0.0 | 23.0 ± 0.1 | 0.806 |
Emergency admission (N, %) | 13,515(65.6) | 5,779(65.4) | 0.608 |
Ethnicity (N, %) | 0.836 | ||
Asian | 541(2.6) | 231(2.6) | |
White | 13,859(67.2) | 5,867(66.4) | |
Black | 1,644(8.0) | 682(77.2) | |
Others | 2,066(10.0) | 897(10.2) | |
Unknown | 2,774(13.5) | 1,157(13.1) |
