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Gambling Symptom Assessment Scale (G-SAS)
Availability
Please visit this website for more information about the instrument: Gambling Symptom Assessment Scale
Classification
Supplemental: Parkinson's Disease (PD)
Short Description of Instrument
The Gambling-Symptom Assessment Scale (G-SAS) is a 12-item self-rated measure that is designed to assess gambling symptom severity and change during treatment.
Comments/Special Instructions
This scale has been used in PD. It may be useful for severity rating. It is recommended as Supplemental since there is not a PD-specific measure for gambling and it has not been validated in PD.
Scoring and Psychometric Properties
Scoring: Each item is scored on a 4-point scale from 0-4 with 0 meaning no symptoms and 4 meaning extreme symptoms. The total maximum score is 48.
 
Scores 7 and lower are considered normal behavior, 8-20 are considered a mild gambling problem, 21-30 are considered a moderate gambling problem, 31-40 are considered a severe gambling problem and 40-48 are considered an extreme gambling problem.
 
Psychometric Properties: Test-retest 0.56 (p
Rationale/Justification
Strengths: The G-SAS is validated in a large sample of the general non-PD population and performed well when compared to existing best evidence gambling scales, it is fairly reliable on repeat administration, brief and easy to administer.
 
Weaknesses: The scale is not validated for use in PD, psychometrics while adequate were not as strong as other pathological gambling scales.
References
Key Reference:
Kim SW, Grant JE, Potenza MN, Blanco C, Hollander E. The Gambling Symptom Assessment Scale (G-SAS): a reliability and validity study. Psychiatry Res 2009;166:76-84.
 
Additional Reference:
Thomas A, Bonanni L, Gambi F, Di Iorio A, Onofrj M. Pathological gambling in Parkinson disease is reduced by amantadine. Ann Neurol. 2010 Sep;68(3):400-4.
 
Document last updated August 2022