“…Four studies matched offenders on offence type (Aytes et al, 2001;Hanson, Broom, & Stephenson, 2004;Henning & Frueh, 1996;Turner et al, 2000). Eight studies matched on demographic criteria, for example age, marital status, education, and employment status (Craissati & McClurg, 1997;Hanson et al, 1993;Henning & Frueh, 1996;Looman, Abracen, & Nicholaichuk, 2000;Marshall, Eccles, & Barbaree, 1991;McGrath, Cumming, Livingston, & Hokes, 2003;Procter, 1996;Turner et al, 2000). Age at onset of offending, which is often considered to be a high predictor of risk of re-offending, was noted in two studies (Henning & Frueh, 1996;Nicholaichuk et al, 2000); date of index offence was noted in Looman et al (2000) and Nicholaichuk et al (2000), and sentence length and sentence served were matched in Henning and Frueh (1996) and McGrath et al (2003).…”