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Table 5 Ratings and accuracy of predictions

From: Predicting inpatient violence using an extended version of the Brøset-Violence-Checklist: instrument development and clinical application

 

Derivation-Sample

Validation-Sample

Validation-Sample

Outcome within the next shift

physical attack (n = 14)

physical attack (n = 37)

physical attack OR intense preventive measure ** (n = 121)

Prediction method and cut-off points

BVC >= 3

BVC-VAS >= 7

VAS >= 4

BVC >= 3

BVC-VAS >= 7

VAS >= 4

BVC >= 3

BVC-VAS >= 7

VAS >= 4

Ratings

1203

1189*

1189

2084

2084

2084

2084

2084

2084

True Positives

9

11

12

25

20

21

74

82

91

False Negatives

5

2

1

12

17

16

47

39

30

True Negatives

1117

1095

959

1852

1884

1692

1817

1862

1678

False Positives

72

81

217

195

163

355

146

101

285

Sensitivity/Specificity in %

64/94

85/93

92/82

68/91

54/92

57/83

61/93

68/95

75/86

  1. * 4 VAS-ratings missing
  2. **seclusion and/or mechanical restraint and/or forced injection