The Health of the Nation Outcome Scales (HoNOS) is a clinician-rated instrument for the differentiated measurement of severity in patients with mental disorder. Item 8 of the instrument, assessing 'Other mental and behavioral problems', is particularly relevant for patients with affective disorders, anxiety disorders, and eating and personality disorders. However, some studies have shown that the scale possesses unsatisfactory psychometric properties. The objective of the present study was therefore to validate the psychometric properties of a more specified version of the HoNOS-D item 8.
