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      Validity of the Problem Gambling Severity Index interpretive categories.

      Journal of Gambling Studies

      Young Adult, Severity of Illness Index, Reproducibility of Results, Middle Aged, Male, Humans, psychology, Gambling, Female, Canada, Aged, Adult, Adolescent

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          Abstract

          The Problem Gambling Severity Index (PGSI) is a widely used nine item scale for measuring the severity of gambling problems in the general population. Of the four gambler types defined by the PGSI, non-problem, low-risk, moderate-risk and problem gamblers, only the latter category underwent any validity testing during the scale's development, despite the fact that over 95% of gamblers fall into one of the remaining three categories. Using Canadian population data on over 25,000 gamblers, we conducted a comprehensive validity and reliability analysis of the four PGSI gambler types. The temporal stability of PGSI subtype over a 14-month interval was modest but adequate (intraclass correlation coefficient = 0.63). There was strong evidence for the validity of the non-problem and problem gambler categories however the low-risk and moderate-risk categories showed poor discriminant validity using the existing scoring rules. The validity of these categories was improved with a simple modification to the scoring system.

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          Journal
          10.1007/s10899-012-9300-6
          22426971

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