Table 1

Pretest probability, SimpliRED, blood gas tension, and respiratory rate findings in 517 cases referred for a lung scan for suspected acute pulmonary embolism

Observation madeProportion
of cases1-150		%
High pretest probability216/51542
SimpliRED negative249/49950
Pao2 ⩾80 mm Hg160/47134
Respiratory rate ⩽20/minute308/50961

  • ↵1-150 The denominator represents the number of cases in which observations were available.