SSD-12
Self-report measure of DSM-5 somatic symptom disorder B criteria.
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The Somatic Symptom Disorder - B Criteria Scale (SSD-12) is a brief self-report questionnaire designed to assess the B criteria of DSM-5 somatic symptom disorder. It captures patients' perceptions of their symptom-related thoughts, feelings, and behaviors.
Quick Facts
- Number of items
- 12
- Item score range
- 0 to 4
- Total score range
- 0 to 48
- Factor structure
- Three-factorial (cognitive, affective, behavioral)
- Minimal clinically important difference
- 3 points
Facts from the source article.
Psychometric properties
Psychometric properties were examined in three German samples: a psychosomatic outpatient clinic (n = 698), the general population (n = 2362), and primary care (n = 501). Internal consistency, measured by Cronbach's alpha, ranged from 0.92 to 0.95. Content validity is considered high because items are based on DSM-5 criteria.
The scale showed positive associations with somatic symptom burden, health anxiety, depression, and anxiety. High scores were linked to poor self-reported general well-being and frequent health care use. The instrument has a three-factorial structure reflecting cognitive, affective, and behavioral aspects.
It is straightforward to complete, with an easy scoring algorithm. Gender- and age-specific norm values from the general population and cut-off values from a clinical sample are available. In a German inpatient psychosomatic rehabilitation sample, the SSD-12 was sensitive to change, with a decrease of 3 points representing a minimal clinically important difference.
Did You Know?
- The 12 items were derived from an initial pool of 98 items using qualitative and quantitative methods.
- Item order alternates between the three subcriteria (cognitive, affective, behavioral).
More in Mental Disorders Screening and Assessment Tools
Sources
Compiled from Wikipedia and the sources listed below. Text from Wikipedia is available under CC BY-SA 4.0; this entry is adapted from it.
- Wikipedia: SSD-12 (CC BY-SA 4.0).
- Word definitions: the Codexery glossary, each quoted from its Wikipedia article.
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