NATIONAL

Survey Year	Instrument	Author	Details
2005-2007	SOGS-RA	Welte et al.	A random telephone survey was conducted with a representative sample of 2,274 U.S. residents aged 14-21. The prevalence of problem gambling, as measured by the SOGS-RA, was 2.1%. Source: Welte, J. W.,  Barnes, G. M., Tidwell, M. O., & Hoffman, J. H. (2008). The prevalence of problem gambling among U.S. adolescents and young adults: Results from a national survey. Journal of Gambling Studies, 24, 119–133. doi: 10.1007/s10899-007-9086-0
2001-2003	Composite International Diagnostic Interview (CIDI); DSM-IV criteria	Kessler et al.	The lifetime prevalence of pathological gambling (PG) within the sample was 0.6%, Sample Size = 9,282. Source: Kessler, R. C., Hwang, I., LaBrie, R., Petukhova, M., Sampson, N. A., Winters, K. C., et al. (2008). DSM-IV pathological gambling in the National Comorbidity Survey Replication. Psychological Medicine, 38(9), 1351-1360. doi: 10.1017/S0033291708002900
1999 & 2000	Diagnostic Interview Schedule (DIS)	Welte et al.	[DIS] Prevalence Rate (combined problem & pathological gamblers) = 3.5%, Sample Size = 2,630. Source:  Welte, J. W., Barnes, G. M., Wieczorek, W.F., Tidwell, M. C., & Parker, J. (2002). Gambling participation in the U.S. - results from a national survey. Journal of Gambling Studies, 18(4), 313-337. doi: 10.1023/A:1021019915591
1998	NORC DSM-IV (NODS)	NORC	[NORC DSM-IV] Prevalence Rate (combined problem & pathological gamblers according to NODS) = 2.7% - lifetime, 1.3% - past year, Sample Size = 2,947 (2,417 via telephone + 530 via intercepts in gaming facilities). Source: National Opinion Research Center. (1999). Gambling impact and behavior study. Chicago: Author.
1975	ISR (Institute of Survey Research "compulsive gambler" items)	Kallick et al.	“…it was estimated that 0.77 percent of the national sample could be classified as "probable" compulsive gamblers, with another 2.33 percent as "potential" compulsive gamblers… The University of Michigan survey team believes, and the Commission concurs, that these estimates should be treated as suggestive rather than conclusive.” (U.S. Commission on the Review of the National Policy Toward Gambling, 1976, p. 73). Sources: Kallick, M., Suits, D., Dielman, T., & Hybels, J. (1979). A survey of American gambling attitudes and behavior. Ann Arbor, MI: Institute for Social Research, The University of Michigan. U.S. Commission on the Review of the National Policy Toward Gambling. (1976). Gambling in America: Final Report. Washington, DC: Author.

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