Follow-up data are reported on 89 sexual offenders treated at the Regional Treatment Centre (Ontario) and 89 untreated sexual offenders matched for pretreatment risk. The average time at risk was 9.9 years. It was found that the treated group had a sexual recidivism rate of 23.6%, whereas the untreated group had a sexual recidivism rate of 51.7% (p <.0001). The groups also differed significantly on nonsexual recidivism. Data on a new analytic technique, the Criminal Career Profile, are also reported. Results are discussed with reference to the recent outcome study of Quinsey, Khanna, and Malcolm.
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