Community-Based Corrections' Impact on Recidivism, Data Download, Iowa Department of Corrections, September 2013

It is no surprise that probationers are less likely to receive new felony or aggravated misdemeanor convictions than are parolees following discharge from supervision; probationers tend to be at lower risk to begin with. Likewise, parolees tend to be at lower risk and less likely to be convicted of serious offenses than are offenders who complete their sentences in prison.