Table 3.

 Summary accuracy estimates produced by three types of tools for risk assessment

	Violent offending (n=30)*	Sexual offending (n=20)†	Criminal offending (n=23)‡
Summary estimates (95% CI) from summary receiver operating characteristic curve
Diagnostic odds ratio	6.07 (4.58 to 8.05)	3.88 (2.36 to 6.40)	2.84 (2.09 to 3.88)
Sensitivity	0.92 (0.88 to 0.94)	0.88 (0.83 to 0.92)	0.41 (0.28 to 0.56)
Specificity	0.36 (0.28 to 0.44)	0.34 (0.20 to 0.51)	0.80 (0.67 to 0.89)
Individual study estimates (median (IQR))
Area under the curve	0.72 (0.68-0.78)	0.74 (0.66-0.77)	0.66 (0.58-0.67)
Positive predictive value	0.41 (0.27-0.60)	0.23 (0.09-0.41)	0.52 (0.32-0.59)
Negative predictive value	0.91 (0.81-0.95)	0.93 (0.82-0.98)	0.76 (0.61-0.84)
Number needed to detain	2 (2-4)	5 (2-11)	2 (2-3)
Number safely discharged	10 (4-18)	14 (5-48)	3 (2-6)

CI=confidence interval; IQR=interquartile range; n=number of samples.

*HCR-20, SARA, SAVRY, and VRAG.

†SORAG, Static-99, and SVR-20.

‡LSI-R and PCL-R.