Psychiatric Disorders Illnesses Defintions of durations and onset according to DSM IV criteria - USMLE Forums
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Old 11-07-2009
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Psyche Psychiatric Disorders Illnesses Defintions of durations and onset according to DSM IV criteria

Commonly seen in USMLE is questions that can only be answered when we know the DSM IV specified duration to define a psychiatric illness:

Here's some high-yield examples:
  • Post Traumatic Stress Disorder ---- > More than 1 Month duration But if less than 1 Month then think Acute Stress Disorder (symptoms should present for more than 2 days)
  • Adjustment Disorder -----------> Less than 6 Months duration within the three months of the causative stressful event
  • Somatization Disorder ------> For prolonged periods of time, if shorter then think of conversion disorders. Also there should be more than 8 physical symptoms and onset before age 30
  • Normal Grief ----------> Up to one year, if more then think of major depression
  • Dysthymic and Cyclothymic disorders ------------> More than 2 Years duration
  • Schizophreniform disorder -------------> More than 1 Month and less than 6 Months (just like schizophrenia but shorter duration)
  • Brief psychiatric disorder -------------> 1-30 days only
  • Delusional disorder -------------> at least One Month of non-bizarre delusion
  • Conduct disorder --------> before age 18 Years, if continued it's called Antisocial personality disorder
  • Conduct disorder ------> Duration more than one Year
  • Oppositional Defiant disorder ------> Duration more than 6 Months
  • Major depression ---------- > More than 2 Weeks duration
  • Bipolar disorder ----------- > More than 1 Week duration (One attack is enough to make the diagnosis)
  • Generalized anxiety disorder ----------- > More than 6 Months duration
  • Hypochondriasis ----> More than 6 Months duration
  • Panic Disorder ------------------ > At least three attacks withing 3 weeks and onset to peak of the attack is within 10 minutes
  • Tourette syndrome ------ > More than 1 Year duration and must be diagnosed before age 18 Years.
  • Narcolepsy ----> Duration of daytime sleepiness must be more than 3 Months
  • Mental retardation ----> Onset before age 18
  • ADHD ------> Duration at least 6 Months and Onset before age 7 Years
  • Autism -----> Onset before age 3 Years
  • Monosymptomatic Nocturnal Enuresis ----> Never diagnose before age 5 Years
  • Stranger anxiety ---> 8 Months to 2 Years old
  • Separation anxiety ----> Onset 1 to 3 Years old and may continue into adolescence

Last edited by rasheed; 12-20-2009 at 02:32 PM.
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Old 06-15-2010
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This is a great post, thank you Rasheed
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Old 06-19-2010
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wow, this is extremely helpful =). Thanks so much for taking the time to list them for us.
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Old 05-23-2011
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though i have not read it yet but i think it will be good post
thanks a lot
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Behavioral-Sciences-, Psychiatry-

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