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How to Combine the Static-99R With the SAPROF-SO.

David Thornton1, Mark E Olver2, Norma E Garza3

  • 1FAsTR LLC, Madison, WI, USA.

International Journal of Offender Therapy and Comparative Criminology
|May 30, 2026
PubMed
Summary
This summary is machine-generated.

The Sexual Accommodation of Psychological Risk Factors - Sexual Offending (SAPROF-SO) measure moderates sexual recidivism risk indicated by the Static-99R. This finding supports a more balanced assessment of sexual offending risk.

Keywords:
SAPROF-SOprotective factorsrisk assessmentsexual recidivismstatic-99R

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Area of Science:

  • Forensic Psychology
  • Criminology
  • Clinical Psychology

Background:

  • Sexual recidivism risk assessment traditionally focuses on risk factors.
  • Instruments like the Static-99R measure these risk factors.
  • A balanced assessment requires consideration of protective factors.

Purpose of the Study:

  • To investigate the moderating effect of protective factors (SAPROF-SO) on recidivism risk (Static-99R).
  • To evaluate the SAPROF-SO Version 1's utility in conjunction with the Static-99R.
  • To inform clinical assessment practices for sexual offending risk.

Main Methods:

  • Logistic regression analysis was used to predict 5-year sexual recidivism.
  • Data from 467 male sexual offenders in Canadian and New Zealand treatment programs were analyzed.
  • Scores from the Static-99R and SAPROF-SO Version 1 were utilized.

Main Results:

  • Both the Static-99R and SAPROF-SO Version 1 were significant predictors of sexual recidivism.
  • The SAPROF-SO powerfully moderated the recidivism risk suggested by Static-99R scores.
  • An Excel-based calculator was developed to implement the logistic regression equation.

Conclusions:

  • The SAPROF-SO enhances the accuracy of sexual recidivism risk assessment by incorporating protective factors.
  • Clinical assessment of sexual offending risk should adopt a more holistic approach.
  • The findings support the use of the SAPROF-SO in conjunction with risk assessment tools like the Static-99R.