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Table 5 Operating characteristics of the Prediction of Acute Coagulopathy of Trauma (PACT) score in the validation cohort

From: Development and validation of a prehospital prediction model for acute traumatic coagulopathy

PACT score

≥100

≥150

≥200

≥250

≥300

 Patients

  True positive

25

25

18

11

3

  False positive

186

125

67

27

9

  True negative

73

134

192

232

250

  False negative

1

1

8

15

23

 Operating characteristics

  Sensitivity (%)

96.2

96.2

69.2

42.3

11.5

  Specificity (%)

28.2

51.7

74.1

89.6

96.5

  Positive likelihood ratio

1.34

1.99

2.68

4.06

3.32

  Negative likelihood ratio

0.14

0.07

0.42

0.64

0.92

COAST score

≥1

≥2

≥3

≥4

≥5

 Patients

  True positive

23

15

7

1

0

  False positive

177

89

36

2

0

  True negative

82

170

223

257

259

  False negative

3

11

19

25

26

 Operating characteristics

  Sensitivity (%)

88.5

57.7

26.9

3.9

0

  Specificity (%)

31.7

65.6

86.1

99.3

100

  Positive likelihood ratio

1.29

1.68

1.94

4.98

—

  Negative likelihood ratio

0.36

0.64

0.85

0.97

1

  1. PACT score Prediction of Acute Coagulopathy of Trauma score, COAST score Coagulopathy of Severe Trauma score