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Table 4 Positive predictive value and area under the curve on combining SIS and KIVS subscales

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

KIVS violence as an adult

>3

3

8

50 %

89 %

27.3 %

0.77

   

(3/6)

(64/72)

(3/11)

0.58–0.96

      

0.031

N = 78

<3

3

64

    

SIS and KIVS violence as an adult combined

 

5

14

83.3 %

80.3 %

26.3 %

0.85

   

(5/6)

(57/71)

(5/19)

0.72–0.99

      

0.009

N = 77

 

1

57

    

KIVS exposure to violence as a child

>4

3

12

50 %

83.3 %

20 %

0.72

   

(3/6)

(60/72)

(3/15)

0.53–0–90

      

0.080

N = 78

<4

3

60

    

SIS and KIVS exposure to violence as a child combined

 

6

30

100 %

58 %

17 %

0.77

   

(6/6)

(41/71)

(6/36)

0.60–0.93

      

0.04

N = 77

 

0

41