BACKGROUND: 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. METHODS: The instrument's reliability and validity were tested using a large, representative, clinical sample of patients with mental disorders (study 1: n = 1,918 and n = 1,357). Additional tests of reliability and criterion validity were performed using a further clinical sample of patients with mental disorders (study 2: N = 55). RESULTS: The extended version of the HoNOS provides a differentiated picture of additional problem areas for the patient. Although inter-rater reliability indicates a need for more detailed instructions, the problem areas of item 8 proved on the whole to be suitable for measuring the extent and severity of mental problems that are present in addition to the primary problem. CONCLUSION: In order to make the extended assessment of the HoNOS useful for clinical routine practice, a supplemental glossary is needed.
BACKGROUND: 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. METHODS: The instrument's reliability and validity were tested using a large, representative, clinical sample of patients with mental disorders (study 1: n = 1,918 and n = 1,357). Additional tests of reliability and criterion validity were performed using a further clinical sample of patients with mental disorders (study 2: N = 55). RESULTS: The extended version of the HoNOS provides a differentiated picture of additional problem areas for the patient. Although inter-rater reliability indicates a need for more detailed instructions, the problem areas of item 8 proved on the whole to be suitable for measuring the extent and severity of mental problems that are present in addition to the primary problem. CONCLUSION: In order to make the extended assessment of the HoNOS useful for clinical routine practice, a supplemental glossary is needed.