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Table 3 The positive predictive value and area under the curve when combining KIVS and SIS

From: Combining the Suicide Intent Scale and the Karolinska Interpersonal Violence Scale in suicide risk assessments

Test

Cut-off

Suicide +

Suicide −

Sensitivity

Specificity

Positive predictive value

AUC 95 % CI p value

SIS

>16

7

35

100 %

52 %

16.7 %

0.74

N = 80

   

(7/7)

(38/73)

(7/42)

0.62–0.86

       

0.037

 

<16

0

38

    

KIVS

>6

6

43

100 %

40 %

12.2 %

0.75

N = 78

   

(6/6)

(29/72)

(6/49)

0.58–0.92

       

0.043

 

<6

0

29

    

SIS + KIVS

 

6

26

100 %

63 %

18.8 %

0.83

    

(6/6)

(45/71)

(6/32)

0.70–0.95

       

0.017

Combined N = 77

 

0

45