1. Age = $$\{Age |Age \le 64 \}$$ 2. Age  = $$\{Age | Age \ge 65 \}$$ 3. N_F_Pred = $$\{N\_F\_Pred |N\_F\_Pred =0 \}$$ 4. N_F_Pred = $$\{N\_F\_Pred | N\_F\_Pred \ge 1 \}$$ 5. N_F_Risk = $$\{ N\_F\_Risk| N\_F\_Risk =0 \}$$ 6. N_F_Risk = $$\{ N\_F\_Risk| N\_F\_Risk \ge 1 \}$$ 7. Previous DVT = $$\{Previous\,DVT| Previous\,DVT =0 \}$$ 8. Previous DVT = $$\{Previous\,DVT| Previous\,DVT =1 \}$$ 9. Palpitations = $$\{Palpitations| Palpitations =0 \}$$ 10. Palpitations = $$\{Palpitations| Palpitations =1 \}$$ 11. Cough = $$\{Cough| Cough =0 \}$$ 12. Cough = $$\{Cough| Cough =1 \}$$ 13. dDimer = $$\{dDimer| dDimer \le 230 \}$$ 14. dDimer = $$\{dDimer| dDimer > 230 \}$$ 15. FC = $$\{FC|50 \le FC \le 99\}$$ 16. FC = $$\{FC| FC \ge 100\}$$ 17. WBC = $$\{WBC|2000 \le WBC \le 10000\}$$ 18. WBC = $$\{WBC|WBC \ge 10000\}$$ 19. Cancer at diagnosis = $$\{ Cancer\,at\,diag.| Cancer\,at\,diag. =0 \}$$ 20. Cancer at diagnosis = $$\{ Cancer\,at\,diag.| Cancer\,at\,diag. =1 \}$$ 21. Shockindex = $$\{Shockindex|0.0 \le Shockindex\le 0.89\}$$ 22. Shockindex [1 ] = $$\{Shockindex| Shockindex\ge 0.9\}$$ 23. Cancer = $$\{Cancer| Cancer=0 \}$$ 24. Cancer = $$\{Cancer| Cancer=1 \}$$ 25. RVD = $$\{RVD| RVD=0 \}$$ 26. RVD = $$\{RVD| RVD=1 \}$$ 27. Dyspnea = $$\{Dyspnea| Dyspnea=0 \}$$ 28. Dyspnea = $$\{Dyspnea| Dyspnea=1 \}$$ 29. Chest pain = $$\{Chest\,pain| Chest\,pain=0 \}$$ 30. Chest pain = $$\{Chest\,pain| Chest\,pain=1 \}$$ 31. PCO2 = $$\{PCO2| 35 \le PCO2 \le 45 \}$$ 32. PCO2 = $$\{PCO| PCO2 > 45 \}$$ 33. PO2 = $$\{PO2| PO2 \le 60 \}$$ 34. PO2 = $$\{PO2| PO2 > 60 \}$$ 35. PH = $$\{PH| 7.3 \le PH \le 7.42 \}$$ 36. PH = $$\{PH|PH > 7.42\}$$ 37. Hemoptysis = $$\{Hemoptysis| Hemoptysis=0 \}$$ 38. Hemoptysis = $$\{ Hemoptysis|Hemoptysis=1 \}$$ 39. Final diagnosis = $$\{Final\,diagnosis| Final\,diagnosis=0 \}$$ 40. Final diagnosis = $$\{Final\,diagnosis| Final\,diagnosis=1 \}$$ 