For comparison, a tabulation of 10% of the prison population, randomly selected, was also done. Measures were tabulated for an initial 3 months and compared to a later 3 month period. In contrast to the findings for Narconon program clients. each of these measures increased with time in the average prison population. The number of guilty findings increased by 77%, the days of lost privileges by 169% and the days of segregation by 26%. The Narconon program was effective in reversing this negative trend.

There was a difference between the Narconon program participants and the general prison population. The Narconon program attracted more property offenders than personal offenders. Whereas the prison population included 58% personal and 42% property offenders, the Narconon program clientele included 33% personal and 58% property offenders. The Narconon program was especially effective at reducing the above negative measures in property offenders while they were on the program. Long term, however, both property and personal offenders benefited approximately equally.

This study also compared the results of the program in its first and second 6 months of operation. The results improved in the second 6 months as the treatment staff became more familiar with the prison population.

The Narconon program delivered in the Delaware Correctional Center was evaluated in 1975. The Narconon program clients were, on average, more violent and were serving a longer term than the average for the population. The mean sentence was 5 years for Narconon clients versus less than one year for the total population. 58% of Narconon clients were incarcerated for a major crime whereas 23% of the total population were incarcerated for a major crime.