eMedicine Specialties > Emergency Medicine > Psychosocial

Depression and Suicide: Differential Diagnoses & Workup

Author: Louise B Andrew, MD, JD, Medical-Legal, Risk Management and Trial Consultant, Litigation Stress Counselor
Contributor Information and Disclosures

Updated: Jun 23, 2008

Differential Diagnoses

Alcohol and Substance Abuse Evaluation
Myasthenia Gravis
Amyotrophic Lateral Sclerosis
Myopathies
Anemia, Chronic
Panic Disorders
Anorexia Nervosa
Pediatrics, Child Abuse
Anxiety
Pediatrics, Child Sexual Abuse
Conversion Disorder
Plant Poisoning, Glycosides - Cardiac
Delirium, Dementia, and Amnesia
Plant Poisoning, Hypoglycemics
Domestic Violence
Polymyalgia Rheumatica
Elder Abuse
Schizophrenia
Encephalitis
Sexual Assault
Endocarditis
Subdural Hematoma
Grief Support in the ED
Tick-Borne Diseases, Lyme
Headache, Tension
Tick-Borne Diseases, Rocky Mountain Spotted Fever
HIV Infection and AIDS
Toxicity, Acetaminophen
Hypercalcemia
Toxicity, Alcohols
Hyperkalemia
Toxicity, Ammonia
Hypermagnesemia
Toxicity, Antidepressant
Hypernatremia
Toxicity, Antihistamine
Hyperparathyroidism
Toxicity, Barbiturate
Hyperphosphatemia
Toxicity, Benzodiazepine
Hyperthyroidism, Thyroid Storm, and Graves Disease
Toxicity, Beta-blocker
Hypoglycemia
Toxicity, Digitalis
Hypokalemia
Toxicity, Gamma-Hydroxybutyrate
Hypomagnesemia
Toxicity, Lithium
Hyponatremia
Toxicity, Narcotics
Hypopituitarism
Toxicity, Phenytoin
Hypothermia
Toxicity, Sedative-Hypnotics
Hypothyroidism and Myxedema Coma
Toxicity, Valproate
Litigation Stress
Vestibular Neuronitis
Meningitis
Withdrawal Syndromes
Metabolic Acidosis
Multiple Sclerosis

Other Problems to Be Considered

Posttraumatic stress disorders
Postpartum depression
Postpartum psychosis
Sheehan syndrome
Chronic fatigue syndrome
Liver failure
Vitamin deficiency
Medication adverse effects
Medication abuse/overdose
Withdrawal from abused substances
Apathetic thyrotoxicosis (in elderly persons)

Workup

Laboratory Studies

  • Depression is a clinical diagnosis. Laboratory tests are primarily used to rule out other diagnoses. Consider the following laboratory tests:
    • Complete blood count (CBC)
    • Electrolytes, including calcium, phosphate, and magnesium
    • BUN and creatinine
    • Calcium
    • Serum toxicology screen
    • Thyroid function tests
    • Thyroid-stimulating hormone (TSH) level

Imaging Studies

  • CT scan or MRI of brain if OBS or hypopituitarism is included in the differential

Other Tests

  • Electrocardiogram (ECG): Diagnosis of arrhythmia, particularly heart block
  • Electroencephalogram (EEG)
  • Certain psychometric tests can make a diagnosis of depressive disorders with reasonable clinical certainty; however, these are not generally available in emergency departments.
    • Zung Self-Rating Depression Scale
    • Beck Depression Inventory (BDI)
    • Criteria for Epidemiologic Studies-Depression (CES-D) scale
  • Studies - Depression scale
    • Children's Depression Inventory (CDI)
    • Yesavage Geriatric Depression Scale

More on Depression and Suicide

Overview: Depression and Suicide
Differential Diagnoses & Workup: Depression and Suicide
Treatment & Medication: Depression and Suicide
Follow-up: Depression and Suicide
References

References

  1. Angst J, Angst F, Stassen HH. Suicide risk in patients with major depressive disorder. J Clin Psychiatry. 1999;60 Suppl 2:57-62; discussion 75-6, 113-6. [Medline].

  2. Apter A, Horesh N, Gothelf D, et al. Relationship between self-disclosure and serious suicidal behavior. Compr Psychiatry. Jan-Feb 2001;42(1):70-5. [Medline].

  3. Gliatto MF, Rai AK. Evaluation and treatment of patients with suicidal ideation. Am Fam Physician. Mar 15 1999;59(6):1500-6. [Medline].

  4. Harwitz D, Ravizza L. Suicide and depression. Emerg Med Clin North Am. May 2000;18(2):263-71, ix. [Medline].

  5. Mann JJ, Apter A, Bertolote J, et al. Suicide prevention strategies: a systematic review. JAMA. Oct 26 2005;294(16):2064-74. [Medline].

  6. Oquendo MA, Malone KM, Mann JJ. Suicide: risk factors and prevention in refractory major depression. Depress Anxiety. 1997;5(4):202-11. [Medline].

  7. Osvath P, Voros V, Fekete S. Life events and psychopathology in a group of suicide attempters. Psychopathology. Jan-Feb 2004;37(1):36-40. [Medline].

  8. Rives W. Emergency department assessment of suicidal patients. Psychiatr Clin North Am. Dec 1999;22(4):779-87, viii. [Medline].

  9. SK Goldsmith, TC Pellmar, AM Kleinman. Reducing Suicide: A National Imperative. Institute of Medicine Monograph. National Academies Press 2002;[Full Text].

  10. Verona E, Sachs-Ericsson N, Joiner TE. Suicide attempts associated with externalizing psychopathology in an epidemiological sample. Am J Psychiatry. Mar 2004;161(3):444-51. [Medline].

Further Reading

Keywords

depressive illness, mood disorder, suicidal, suicidality, suicide ideation, suicide attempt, suicide attempts, self-destructive acts, self-murder, suicide gesture, major depressive disorder, MDD, unipolar depression, unipolar affective disorder, serotonin, norepinephrine, dopamine, selective serotonin reuptake inhibitors, SSRIs, tricyclic antidepressants, TCAs, norepinephrine, NE, dopamine, DA, suicide, seasonal affective disorder, SAD, antidepressants, lithium, psychotherapy, substance abuse, alcohol abuse, drug abuse

Contributor Information and Disclosures

Author

Louise B Andrew, MD, JD, Medical-Legal, Risk Management and Trial Consultant, Litigation Stress Counselor
Louise B Andrew, MD, JD is a member of the following medical societies: American Association of Women Emergency Physicians, American College of Emergency Physicians, and American Medical Association
Disclosure: Nothing to disclose.

Medical Editor

Dana A Stearns, MD, Assistant Director of Undergraduate Education, Department of Emergency Medicine, Massachusetts General Hospital
Dana A Stearns, MD is a member of the following medical societies: American Academy of Emergency Medicine and American College of Emergency Physicians
Disclosure: Nothing to disclose.

Pharmacy Editor

Francisco Talavera, PharmD, PhD, Senior Pharmacy Editor, eMedicine
Disclosure: eMedicine Salary Employment

Managing Editor

Robert Harwood, MD, MPH, FACEP, FAAEM, Program Director, Department of Emergency Medicine, Advocate Christ Medical Center; Assistant Professor, Department of Emergency Medicine, University of Illinois at Chicago College of Medicine
Robert Harwood, MD, MPH, FACEP, FAAEM is a member of the following medical societies: American Academy of Emergency Medicine, American College of Emergency Physicians, American Medical Association, Council of Emergency Medicine Residency Directors, Phi Beta Kappa, and Society for Academic Emergency Medicine
Disclosure: Nothing to disclose.

CME Editor

John D Halamka, MD, MS, Associate Professor of Medicine, Harvard Medical School, Beth Israel Deaconess Medical Center; Chief Information Officer, CareGroup Healthcare System and Harvard Medical School; Attending Physician, Division of Emergency Medicine, Beth Israel Deaconess Medical Center
John D Halamka, MD, MS is a member of the following medical societies: American College of Emergency Physicians, American Medical Informatics Association, Phi Beta Kappa, and Society for Academic Emergency Medicine
Disclosure: Nothing to disclose.

Chief Editor

Barry E Brenner, MD, PhD, FACEP, Professor of Emergency Medicine, Professor of Internal Medicine, Program Director, Emergency Medicine, University Hospitals, Case Medical Center
Barry E Brenner, MD, PhD, FACEP is a member of the following medical societies: Alpha Omega Alpha, American Academy of Emergency Medicine, American College of Chest Physicians, American College of Emergency Physicians, American College of Physicians, American Heart Association, American Thoracic Society, Arkansas Medical Society, New York Academy of Medicine, New York Academy of Sciences, and Society for Academic Emergency Medicine
Disclosure: Nothing to disclose.

 
 
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