Mixed anxiety-depressive disorder is a diagnostic category defining patients who suffer from both anxiety and depressive symptoms of limited and equal intensity accompanied by at least some autonomic features. The World Health Organization's ICD-10 describes Mixed anxiety and depressive disorder : "...when symptoms of anxiety and depression are both present, but neither is clearly predominant, and neither type of symptom is present to the extent that justifies a diagnosis if considered separately. When both anxiety and depressive symptoms are present and severe enough to justify individual diagnoses, both diagnoses should be recorded and this category should not be used." 
- "ICD-10:". Apps.who.int. http://apps.who.int/classifications/apps/icd/icd10online/. Retrieved 2010-07-10.