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Brief Symptom Inventory-18 (BSI-18)
Availability
Please visit this website for more information about the instrument:
Classification
Supplemental – Highly Recommended: Sport-Related Concussion (SRC) Acute (time of injury until 72 hours)
Supplemental: Sport-Related Concussion (SRC) Subacute (after 72 hours to 3 months) and Persistent/Chronic (3 months and greater post concussion) and Traumatic Brain Injury (TBI)
Exploratory: Unruptured Cerebral Aneurysms and Subarachnoid Hemorrhage (SAH)
Short Description of Instrument
The Brief Symptom Inventory-18 (BSI-18), a shortened version of the SCL-90, is an 18 item scale with 3 clinical scales (Depression, Anxiety, and Somatization) and an overall Global Severity Index.
Proper administration requires that the test taker must be able to see, read and comprehend to respond meaningfully to the items.  Average reading difficulty is about the 6th-grade level. Computer software administration and scoring is available.
Sport-Related Concussion Specific:
Advantages: Widely used and accepted instrument for assessing psychological health across several domains(depression, anxiety, somatization). Is not a diagnostic instrument, but does have domain scores. Widely used as screen for psychological health problems in primary care. It is highly recommended for studies of outcome/prognosis/recovery trajectory.
Age Range: Most suggest 18 years and older
Scoring
Normalized T-scores for the 3 Symptom Dimensions (Depression, Anxiety, and Somatization) and the Global Severity Index. Normative comparison groups based on community dwelling adults (n = 1,122; 605 males and 517 females).
References
Derogatis LR (2001).  Brief Symptom Inventory 18 (BSI 18): Administration, Scoring and Procedures Manual.  Minneapolis, MN : NCS Pearson, Inc.
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