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PTSD: National Center for PTSD

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Davidson Trauma Scale (DTS)


Davidson Trauma Scale (DTS)

Davidson, 1997


The DTS is a 17-item self-report measure that assesses the 17 DSM-IV symptoms of PTSD. Items are rated on 5-point frequency (0 = "not at all" to 4 = "every day") and severity scales (0 = "not at all distressing" to 4 = "extremely distressing"). Respondents are asked to identify the trauma that is most disturbing to them and to rate, in the past week, how much trouble they have had with each symptom.

The DTS yields a frequency score (ranging from 0 to 68), severity score (ranging from 0 to 68), and total score (ranging from 0 to 136). It can be used to make a preliminary determination about whether the symptoms meet DSM criteria for PTSD. Scores can also be calculated for each of the 3 PTSD symptom clusters (i.e., B, C, and D).

Sample Item

Have you had painful images, memories or thoughts of the event? (Respondents rate how much trouble they have had with each symptom).


The SPAN is a 4-item screen for PTSD that was empirically derived from the DTS (Meltzer-Brody et al., 1999).


Davidson, J. R. T., Book, S. W., Colket, J. T., Tupler, L. A., Roth, S., David, D., Hertzberg, M., Mellman, T., Beckham, J. C., Smith, R., Davison, R. M., Katz, R., & Feldman, M. (1997). Assessment of a new self-rating scale for post-traumatic stress disorder. Psychological Medicine, 27, 153-160.

Meltzer-Brody S., Churchill, E, Davidson, J. R. (1999). Derivation of the SPAN, a brief diagnostic screening test for posttraumatic stress disorder. Psychiatry Research, 88, 63-70.

Davidson, J. R., Tharwani, H. M., Connor, K. M. (2002). Davidson Trauma Scale (DTS): Normative scores in the general population and effect sizes in placebo-controlled SSRI trials. Depression and Anxiety, 15, 75-78.

Additional Reviews

Orsillo (2001) (PDF) p. 261.

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

Norris and Hamblen (2004) (PDF) p. 80.

Norris, Fran H. & Hamblen, Jessica L. (2004). Standardized self-report measures of civilian trauma and PTSD. In J.P. Wilson, T.M. Keane & T. Martin (Eds.), Assessing psychological trauma and PTSD (pp. 63-102). New York: Guilford Press. PILOTS ID 18638

To Obtain Scale

Mental Health Systems, Inc.
PO Box 950
908 Niagara Falls Blvd.
North Tonawanda, NY 14120-2060
Phone: (800) 456-3003

Measure availability: Information on measures is available to everyone. However, the assessment tools themselves can only be distributed to qualified mental health professionals and researchers. We maintain measures developed by affiliated staff of the National Center for PTSD.

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

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Where to Get Help for PTSD

Using the PILOTS database for Assessment Information
The PILOTS database is the largest electronic index to the world's literature on traumatic stress.

The National Center for PTSD does not provide direct clinical care, individual referrals or benefits information.

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