ICD-10 field trial in German-speaking countries--summary of the quantitative empirical results.

The summary of the quantitative results of the ICD-10 field trial in German-speaking countries shows a adequate acceptance of ICD-10. The figures for interrater reliability for the diagnostic categories are adequate for most categories considering the comparatively low level of familiarity with the new system. The high degree of overlap between the diagnostic categories in ICD-9 and ICD-10 is an indication of the validity of ICD-10. The major source of disagreement is the relocation of several diagnostic categories to different sections.