Table 1.

Indicators and estimates used in this study.

Indicator or estimate	Definition
Beds for forensic psychiatric patients	Number of beds in specialized forensic in- and outpatient services, general psychiatric hospitals and medical prison wards with a specific assignment or are officially registered as bed or place for the treatment and/or detention of forensic psychiatric patients or mentally ill offenders (criteria and assignment procedures may differ across countries). If official number is unknown, estimated figures were included (marked)
Rate of forensic psychiatric beds per country	Beds for forensic psychiatric patients (as defined above) per 100,000 population [population figures of countries by Eurostat (19)]
Estimated treated prevalence rate of mentally ill offenders	a) Number of forensic psychiatric patients in specialized forensic psychiatric facilities (when reported) per 100,000 population b) Number of forensic psychiatric patients in all facilities (when reported) per 100,000 population [population figures of countries by Eurostat (19)]
Indicators of incidence of mentally ill offenders	Annual number of verdicts for defendants found not being guilty by reason of insanity per 100,000 population and year [annual population number by Eurostat (19)]