P1: FPY/FJQ/FLK P2: FNN
Sexual Abuse: A Journal of Research and Treatment [saj] PL101-173 March 14, 2000 16:23 Style ﬁle version Nov. 19th, 1999
Sexual Abuse: A Journal of Research and Treatment, Vol. 12, No. 2, 2000
Outcome of an Institutional Sexual Offender
Treatment Program: A Comparison Between
Treated and Matched Untreated Offenders
and Stephen Wong
Data from a sexual offender treatment program operated by the Correctional Ser-
vice of Canada at the Regional Psychiatric Center (Saskatoon) supported the
conclusion that cognitive behavioral treatment can reduce sexual offense recidi-
vism. The study compared 296 treated and 283 untreated offenders followed for a
mean of 6 years after their release. An untreated comparison subject was located
for each treated offender on three dimensions: (a) age at index offense, (b) date
of index offense, and (c) prior criminal history. Data were analyzed using tests of
proportion, survival analysis, and analysis of offender Criminal Career Proﬁles.
Over a mean follow-up period of almost 6 years, convictions for new sexual
offensesamongtreated offenders were 14.5%versus33.2% foruntreatedoffenders.
During the follow-up period, 48% of treated offenders remained out of prison
compared to 28.3% of untreated offenders. Time series comparisons of treated
and comparison samples also showed that treated men reoffended at signiﬁcantly
lower rates after 10 years.
A Criminal Career Proﬁle (CCP) was constructed by taking the Age at First
Conviction and plotting the offender’s successive lengths of time free against time
incarcerated. Pre- and posttreatment slopes of the CCP were lower for both groups
posttreatment; however, the degree of change was signiﬁcantly greater for the
treated group, indicating a greater reduction in criminal activity among these
offenders. Taken together, the results of all three analytic techniques supported the
efﬁcacy of appropriate correctional treatment for effective reduction of recidivism.
KEY WORDS: sex offender treatment outcome; recidivism; criminal career proﬁle; efﬁcacy of
Correctional Service of Canada, Regional Headquarters, Prairies, P.O. Box 9223, 2313 Hanselman
Place, Saskatoon, Saskatchewan S7K 3X5, Saskatoon, Saskatchewan.
Twin Rivers Correctional Center, Monroe, Washington.
Regional Psychiatric Center (Prairies), Saskatoon, Saskatchewan.
To whom correspondence should be addressed.
2000 Plenum Publishing Corporation