Which statement about DSM-5-TR's stance on functional deterioration in diagnosis is true?

Which statement about DSM-5-TR's stance on functional deterioration in diagnosis is true?

• A. It is required for diagnosis
• B. It is not required for diagnosis
• C. It is required only for some subtypes
• D. It is required in all cases

Answer: (B)

Functional deterioration from premorbid functioning is not a universal prerequisite for a DSM-5-TR diagnosis. The manual guides diagnosis mainly by the specific pattern of symptoms, their duration, and whether they cause clinically significant distress or impairment in functioning. While impairment is often part of the diagnostic criteria, the key point is that a clear drop from prior functioning isn’t required across all disorders. This allows diagnosis based on the current symptom constellation and course, even if premorbid functioning isn’t well documented or markedly worsened.

Functional deterioration from premorbid functioning is not a universal prerequisite for a DSM-5-TR diagnosis. The manual guides diagnosis mainly by the specific pattern of symptoms, their duration, and whether they cause clinically significant distress or impairment in functioning. While impairment is often part of the diagnostic criteria, the key point is that a clear drop from prior functioning isn’t required across all disorders. This allows diagnosis based on the current symptom constellation and course, even if premorbid functioning isn’t well documented or markedly worsened.