Adult recidivism looks at the status of an offender at the one-year, two-year, and three-year marks from their release from prison to supervision or discharge status. Recidivists include any return to prison for a new felony conviction or for a revocation of parole or suspended sentence supervision.
Juvenile recidivism looks at the status of a youth at the one-year, two-year, and three-year marks from their release to aftercare. The follow are counted as recidivists: revocation of aftercare, adjudication for a new offense and recommitted/remanded back to DOC, or admitted to adult prison.
An offender has to have been discharged for a full calendar year to be included in the one-year count (and two full years and three full years for those subsequent counts), which is why the data is delayed.