Data from Studies That Reported the Percentage of Participants Diagnosed with Psychosis Among Individuals who Committed Sexual Murders
| Study (By order of % diagnosed with psychosis) | Diagnosis of Psychosis (%) | Sample Size (n/N)a | Sampling Method | Sample Source | Information Source |
|---|---|---|---|---|---|
| Langevin et al.38 (2003) | 27.3% | 9/33 | Convenience | Cases referred to the Clarke Institute of Psychiatryb | Standard tests and interviews |
| Revitch45 (1965) | 20.9% | 9/43 | Convenience | Primarily from the New Jersey Diagnostic Centerc | Not stated |
| Firestone et al.44 (1998) | 14.6% | 7/48 | Convenience | Cases from the Sexual Behaviors Clinic, Royal Ottawa Hospital | Standard tests and interviews |
| Warren et al.36 (1996) | 5.0% | 1/20 | Population-based | FBI's National Center for the Analysis of Violent Crime | Multiple sources, including police investigation reports, psychiatric reports, and interviews with the offender |
| Hill et al.46 (2007) | 3.0% | 5/166 | Convenience | Reports by forensic psychiatrists in Germany | Assessments by forensic psychiatrists |
| Oliver et al.49 (2007) | 2.3% | 1/44 | Convenience | Sex offender treatment programs in prisons | Interviews and file reviews |
| Folino37 (2000) | 0% | 0/16 | Population-based | Files from the Judiciary Department of La Plata, Argentina | File reviews |
| Rosman & Resnick50 (1989) | 0% | 0/16 | Convenience | Available literature and unpublished clinical cases | Case reviews |