CTPA

(%)

V/Q

High probability

(%)

High + Intermediate probability

Low probability / normal

Intermediate + low probability / normal

True positive

n = 9

(19.15%)

27

(57.45%)

46

(97.87%)

-

-

False positive

n = 1

(1.16%)

2

(4.26%)

4

(8.51%)

-

-

True negative

n = 85

(98.84%)

-

-

82

(95.35%)

84

(97.67%)

False negative

n = 38

(44.19%)

-

-

1

(1.16%)

20

(23.26%)

Positive predictive value (PPV)

90.00%

93.10%

92.00%

-

-

Negative predictive value (NPV)

69.11%

80.77%

98.80%

-

-

Accuracy

70.68%

83.46%

96.24%

-

-

Sensitivity

19.15%

57.45%

97.87%

-

-

Specificity

98.84%

97.67%

95.35%

-

-