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PTSD: National Center for PTSD


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Los Angeles Symptom Checklist (LASC)



This section is for Researchers, Providers, & Helpers

This section is for Researchers, Providers, and Helpers

Los Angeles Symptom Checklist (LASC)

King, 1995


The LASC is a 43-item self-report measure of PTSD and associated features. The LASC does not key to any specific trauma and inquires about the presence of problems in the past month. The 17 DSM-IV symptoms of PTSD are embedded among other items that assess more general psychological distress. Items are rated on a 5-point scale ranging from 0 ("no problem") to 4 ("extreme problem").

A preliminary diagnosis of PTSD can be derived by using DSM-IV criteria with a symptom counting toward diagnosis if it is rated at two or higher. In addition, a continuous measure of PTSD symptom severity can also be computed by summing the ratings of the 17 items corresponding to the symptoms of PTSD. A sum of all 43 items provides an index of global assessment of distress and adjustment problems that may be a consequence of trauma exposure.

Sample Item

  • "Difficulty falling asleep." (Respondents are asked to rate how much of a problem the item is for them.)


An LASC for adolescents is also available.


King, Lynda A; King, Daniel W; Leskin, Gregory Alan; Foy, David W. (1995). The Los Angeles Symptom Checklist: a self-report measure of posttraumatic stress disorder. Assessment, 2, 1-17

Additional Reviews

Orsillo (2001) (PDF) p. 270.

Orsillo, Susan M. (2001). Measures for acute stress disorder and posttraumatic stress disorder. In M.M. Antony & S.M. Orsillo (Eds.), Practitioner's guide to empirically based measures of anxiety (pp. 255-307). New York: KluwerAcademic/Plenum. PILOTS ID 24368

To Obtain Scale

David Foy, PhD
Graduate School of Education & Psychology
Pepperdine University
16830 Ventura Boulevard, Suite #200
Encino, CA 91436

Measure availability: We provide information on a variety of measures assessing trauma and PTSD. These measures are intended for use by qualified mental health professionals and researchers. Measures authored by National Center staff are available as direct downloads or by request. Measures developed outside of the National Center can be requested via contact information available on the information page for the specific measure.

Date this content was last updated is at the bottom of the page.

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