Neurotic, stress-related and somatoform disorders (section F4) and physiological dysfunction associated with mental or behavioural factors (section F5): results of the ICD-10 field trial.

The results of the ICD-10 field trial in German-speaking countries relevant to sections F4 (neurotic, stress-related and somatoform disorders) and F5 (physiological dysfunction associated with mental or behavioural factors) show a comparatively low level of acceptance. Interrater-reliability in various diagnostic categories is not always adequate. In particular the allocation of some of the "old" diagnostic entities of ICD-9 to various sections of ICD-10, and in part unsatisfactory classificatory distinctions gave rise to certain problems.