What are the key diagnostic criteria for adjustment disorder according to NICE guidelines?

Key diagnostic criteria for adjustment disorder according to NICE guidelines are not explicitly detailed in the provided NICE guideline excerpts.

However, adjustment disorder is generally characterised by the development of emotional or behavioural symptoms in response to an identifiable stressor occurring within 3 months of the onset of the stressor, leading to marked distress that is out of proportion to the severity or intensity of the stressor and/or significant impairment in social, occupational, or other important areas of functioning. Symptoms do not meet criteria for another mental disorder and do not represent normal bereavement. The disturbance usually resolves within 6 months after the stressor or its consequences have ceased.

Since the provided NICE documents do not specifically outline adjustment disorder diagnostic criteria, it is recommended to refer to standard diagnostic manuals such as ICD-11 or DSM-5 for precise criteria, and NICE clinical knowledge summaries or mental health guidelines for management advice.