Table 1. Clinical characteristics of included patients.
| Characteristics | Training group (n=133) | Testing group (n=45) | Validation group (n=43) | P† | P‡ | P§ |
|---|---|---|---|---|---|---|
| Male/female | 58/75 | 19/26 | 18/25 | 0.871 | 0.774 | 0.973 |
| Age (years) | 65.4±15.6 | 59.6±19.2 | 62.8±20.0 | 0.043* | 0.332 | 0.388 |
| APE (n) | 63 (47.3) | 23 (51.1) | 31 (72.1) | 0.609 | 0.006* | 0.009* |
| BMI (kg/m2) | 25.5±4.5 | 25.5±4.6 | 24.6±3.9 | 0.996 | 0.262 | 0.418 |
| Temperature (℃) | 36.6±0.8 | 36.7±0.5 | 36.6±0.3 | 0.731 | 0.383 | 0.278 |
| HR (bpm) | 85.0±17.0 | 91.7±18.1 | 89.6±14.6 | 0.059 | 0.144 | 0.626 |
| RR (times/min) | 20.9±3.8 | 20.9±3.3 | 21.3±3.3 | 0.957 | 0.757 | 0.814 |
| SP (mmHg) | 126.1±24.7 | 129.0±19.9 | 128.0±15.7 | 0.531 | 0.677 | 0.849 |
| DP (mmHg) | 76.2±13.7 | 74.8±13.9 | 77.6±12.2 | 0.610 | 0.504 | 0.401 |
| Chest pain | 31 (23.3) | 12 (26.7) | 18 (41.9) | 0.689 | 0.018* | 0.133 |
| Dyspnea | 83 (62.4) | 27 (60.0) | 31 (72.0) | 0.774 | 0.284 | 0.232 |
| Hemoptysis | 9 (6.8) | 2 (4.4) | 4 (9.3) | 0.576 | 0.598 | 0.673 |
| Fever | 15 (11.3) | 10 (22.2) | 6 (14.0) | 0.068 | 0.538 | 0.315 |
| Syncope | 11 (8.3) | 2 (4.4) | 4 (9.3) | 0.394 | 0.523 | 0.366 |
| WBC (×109/L) | 8.8±4.1 | 8.3±4.7 | 9.5±4.1 | 0.261 | 0.245 | 0.467 |
| Percentage of neutrophils (%) | 72.2±11.3 | 73.8±10.7 | 73.3±12.4 | 0.193 | 0.521 | 0.552 |
| Percentage of lymphocytes (%) | 19.3±9.9 | 17.4±9.1 | 19.5±10.8 | 0.277 | 0.988 | 0.343 |
| Hemoglobin (g/L) | 127.1±22.1 | 123.6±26.5 | 125.9±16.7 | 0.400 | 0.709 | 0.630 |
| CRP (mg/L) | 17.9 (4.2–52.1) | 27.2 (3.7–48.5) | 19.5 (4.1–49.3) | 0.659 | 0.787 | 0.126 |
| D-Dimer (mg/L) | 2.2 (1.0–6.7) | 2.5 (0.9–7.4) | 3.1 (1.2–6.4) | 0.961 | 0.511 | 0.440 |
| NT-proBNP (pg/mL) | 391.0 (88.5–1,600.0) | 213.0 (48.3–1,068.5) | 324.0 (38.8–1,816.5) | 0.185 | 0.636 | 0.657 |
Data are presented as the mean ± standard deviation, median (interquartile range), or number (%). *, P<0.05; †, training group and testing group; ‡, training group and validation group; §, testing group and validation group. APE, acute pulmonary thromboembolism; BMI, body mass index; HR, heart rate; RR, respiratory rate; SP, systolic pressure; DP, diastolic pressure; WBC, white blood cell; CRP, C-reactive protein; NT-proBNP, N-terminal prohormone of brain natriuretic peptide.