Life Events Checklist for DSM-5

The Life Events Checklist for DSM-5 (LEC-5) is a standard self-report instrument designed to map an individual's lifetime exposure to a broad spectrum of…

Questions: 17
Duration: 5 min
Original title: Life Events Checklist for DSM-5
Adaptation: Life Events Checklist for DSM-5
Authors: Weathers, F.W., Blake, D.D., Schnurr, P.P., Kaloupek, D.G., Marx, B.P., & Keane, T.M.
Created: 2013

The Life Events Checklist for DSM-5 (LEC-5) is a standard self-report instrument designed to map an individual's lifetime exposure to a broad spectrum of potentially traumatic events. Developed by the National Center for PTSD, it aligns directly with DSM-5 Criterion A. It serves as an essential preliminary tool to gather comprehensive trauma histories, anchoring the clinician's initial case formulation before moving into symptom-specific assessments.

By surveying 17 distinct trauma categories—spanning from natural disasters and interpersonal violence to occupational exposures and severe accidents—the LEC-5 ensures clinicians do not overlook critical index events that drive common reactions to trauma. It is particularly valuable because it differentiates how the person was exposed, noting whether the event was directly experienced, witnessed, learned about, or encountered repeatedly on the job.

Establishing this baseline provides a structured foundation for clinical review. It helps the clinician and patient safely pinpoint the most distressing "worst" event, which then becomes the focus for subsequent symptom evaluation scales (like the PCL-5) and trauma-focused therapy.

Example result

Fictitious result, computed from a sample set of answers.

Overall score

11/ 17

The Life Events Checklist for DSM-5 (LEC-5) is a 17-item self-report questionnaire designed to screen for exposure to potentially traumatic events over a person's lifetime. It is used to identify experiences that could meet Criterion A for posttraumatic stress disorder (PTSD) according to the DSM-5. The instrument is not numerically scored but is used as a qualitative checklist, often prior to administering a symptom scale such as the PCL-5.

017

Scoring

Sum of events with exposure (0 to 17), total score from 0 to 17, each item is rated on a 6-point scale (from 0 to 1).

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What the test measures

The LEC-5 systematically catalogs an individual's lifetime exposure to external events capable of causing severe psychological distress.

Direct experience: Traumas the person survived directly in their own body, with repeated interpersonal violations often flagging a risk for complex PTSD.
Witnessed events: Traumatic incidents the person observed happening to others, capturing the profound impact of seeing severe injury or death.
Indirect exposure: Learning about sudden, violent traumas occurring to close family members or friends.
Occupational exposure: Repeated, extreme exposure to aversive details of traumatic events in the context of professional duties (e.g., first responders, military personnel).
Event breadth: A comprehensive sweep across distinct environmental, accidental, combat, and interpersonal categories.

This measure is intended for adults and older adolescents in clinical, medical, or research settings to establish a reliable baseline of lifetime trauma exposure.

When and why to use it

The LEC-5 is utilized whenever a clinician needs a thorough, standardized inventory of a patient's trauma history without prematurely triggering acute distress.

Intake baseline: To comprehensively map the patient's trauma timeline before exploring the PTSD cognitive model.
Criterion A evaluation: To verify whether the specific events described meet the strict DSM-5 definitional threshold for a traumatic stressor.
Guiding psychoeducation: To contextualize current physiological distress, validating why the patient's fight-flight-freeze response remains highly sensitized.
Addressing behavioral safety: To understand the historical origins of pervasive experiential avoidance and targeted numbing strategies.

A structured checklist prevents the common pitfall of patients spontaneously omitting shameful, repressed, or normalized traumas, providing a robust empirical starting point over unstructured interviewing alone.

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The questions

Listed below are a number of difficult or stressful things that sometimes happen to people. For each event, please check the box or boxes that indicate your type of experience. Be sure to consider your entire life (growing up as well as adulthood) as you go through the list of events.
1. Natural disaster (e.g., flood, hurricane, tornado, earthquake)
Assesses exposure to catastrophic weather or geological events.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
2. Fire or explosion
Inquires about involvement in severe fires or explosive incidents.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
3. Transportation accident (e.g., car or boat accident, train derailment, plane crash)
Checks for experiences involving severe crashes in land, air, or water transport.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
4. Serious accident at work, at home, or during a leisure activity
Explores major accidental injuries occurring in everyday occupational or leisure settings.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
5. Exposure to a toxic substance (e.g., dangerous chemicals, radiation)
Probes for contact with hazardous biological, chemical, or radioactive agents.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
6. Physical assault (e.g., being attacked, hit, stabbed, beaten, kicked)
Assesses direct experiences of unarmed physical violence or bodily harm.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
7. Assault with a weapon (e.g., being threatened or hurt with a gun, knife, bomb)
Inquires about violent encounters involving firearms, blades, or explosive weapons.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
8. Sexual assault (e.g., rape, attempted rape, being forced or threatened to perform any sexual act)
Explores experiences of coerced or forced sexual acts.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
9. Other unwanted or uncomfortable sexual experience (e.g., childhood sexual abuse)
Checks for other forms of sexual boundary violations or distressing sexual encounters.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
10. Combat or exposure to a war zone (in the military or as a civilian)
Assesses exposure to military conflict or active war zones.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
11. Captivity (e.g., being kidnapped, abducted, held hostage, held as a prisoner of war)
Inquires about experiences of being held against one's will or deprived of liberty.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
12. Life-threatening illness or injury
Explores history of acute, life-endangering medical conditions or traumatic injuries.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
13. Severe human suffering
Checks for exposure to the extreme distress, starvation, or affliction of others.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
14. Violent death (e.g., homicide, suicide)
Assesses experiences related to the abrupt, unnatural death of another person.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
15. Sudden, accidental death
Inquires about exposure to unexpected fatal accidents.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
16. Causing serious injury, harm, or death to someone else
Explores the psychological burden of being the agent of another's severe harm or death.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply
17. Any other very stressful experience (e.g., severe childhood neglect)
Provides an open category for unlisted profound stressors.
- It happened to me
- I witnessed it
- I learned about it
- As part of my job
- I'm not sure
- Does not apply