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. 2019 Nov 13;4:28. Originally published 2019 Feb 11. [Version 2] doi: 10.12688/wellcomeopenres.14970.2

Table 4. The comparison of the reconviction rates in released prisoners reported in the previous review ( Fazel & Wolf, 2015) with those reported in the present review.

Country Previously reported rate (year) New rate (year) Notes
1-year reconviction
UK: E&W 46% (2000)
45% (2012/2013)
48% (2015/2016) Change in data source and cohort composition in 2015.
Rates for 2012/2013 were recalculated as 49% in the newly published
statistics.
Significant difference between recalculated 2012/2013 rates and 2015/2016
rates (χ2 = 15.6, df = 1, p = 0.0001).
UK: N. Ireland 25% (2005) 37% (2014/2015) Changes in the outcome definition.
1- and 2-year reconviction rates were used as outcomes in the older report.
In the newer report, ‘proven reconviction’ is used, which is 1-year reconviction
rate with an extra 6-month period to allow for the imposition of a court
conviction. The management of individuals’ data and the agencies responsible
for it have also changed (outlined in the reports’ methodology sections).
UK: Scotland 46% (2009/2010) 43% (2015/2016) Rates for 2009/2010 were recalculated from 45.7% in the old publication to
46.3% in the newly published statistics.
Significant difference between recalculated 2009/2010 rates and 2015/2016
rates (χ2 = 11.4, df = 1, p = 0.0007).
2-year reconviction
Denmark 29% (2005) 63% (2013) Changes in reporting practices and outcome operationalisation.
The online recidivism calculator was introduced by Statistics Denmark, which
allows to choose required composition of the cohort of interest. The new
sample excludes individuals younger than 20 years old. The new outcome now
includes an extra 1-year period to allow for the imposition of a court conviction
(no such period was used in the calculation of the previous reconviction rate).
Sweden 43% (2005) 61% (2011) Changes in the outcome operationalisation.
The new outcome now includes an extra 3-year period to allow for the
imposition of a court conviction (no such period was used in the calculation of
the previous reconviction rate).
Iceland 27% (2005) 27% (2009/2011) No significant difference (χ2 = 0, df = 1, p = 0.9984).
Netherlands 48% (2007) 46% (2013) Rates for 2007 were recalculated as 49% in the newly published statistics.
Significant difference between 2007 recalculated rates and 2013 rates (χ2
=94.2, df = 1, p = 0.0001).
Singapore 27% (2011) 26% (2015) No exact information about sample size available.
3-year reconviction
Germany 48% (2004) 46% (2007) Sample sizes estimation were taken from Hohmann-Fricke (2014).
Significant difference (χ2 = 18.4, df = 1, p = 0.0001).
Ireland, Republic
of
51% (2008) 45% (2010) Significant difference (χ2 = 48.1, df = 1, p = 0.0001).
Larger number of prisoners in the newer cohort.
5-year reconviction
France 59% (2002) 58% (2004) No significant difference (χ2 = 2.6, df = 1, p = 0.1042).