They also pointed out that the vast majority of the prisoners in question had been unemployed – query unemployable – before they became involved in crime. Many of them did not have any skills and none had a profession. The prisoners examined ranged in age from 16 to 64 years, but it was a much younger group who had learning disabilities, the average age of whom was 26 years. The average age of other prisoners was 29 years. Among prisoners in the Curragh and Arbour Hill there was no significantly younger group with learning disabilities or a mental handicap because such prisoners are mainly imprisoned for sex offences and were found to be very much on a par with the general population.