Dynamic risk assessment in sexual offenders using STABLE-2000 and the STABLE-2007: an investigation of predictive and incremental validity.

The predictive accuracy of STABLE-2000 and STABLE-2007 was examined within a prospective research design in a German-speaking sample of 263 adult male prison-released sexual offenders followed up for an average of 6.4 years. The STABLE-2007 was significantly related to all outcomes (AUC = 0.67-0.71), whereas the STABLE-2000 demonstrated only weak predictive accuracy for sexual reoffense (AUC = 0.62). Supporting the results of the construction sample, the STABLE-2007 incrementally added to the predictive accuracy of the STATIC-99 for violent and general reoffense (conviction and incarceration). Moreover, the STABLE-2007 total scores and the nominal risk/need categories made significant incremental contributions over the SORAG for predicting sexual reoffense.