4-Level Pulmonary Embolism Clinical Probability Score (4PEPS)CPP: clinical pretest probabilityLoading...Age, years< 50-250-64-1> 640SexFemale0Male+2Chronic respiratory diseaseYes-1No0Heart rate < 80Yes-1No0Chest pain AND acute dyspneaNo0Yes+1Current estrogen useNo0Yes+2Prior hx of VTENo0Yes+2SyncopeNo0Yes+2Immobility within the last 4 weeksNo0Yes+2O2 saturation < 95%No0Yes+3Calf pain and/or unilateral lower limb edemaNo0Yes+3PE is the most likely diagnosisNo0Yes+5