“…The analysis samples for these studies ranged from 94 to 18,625 participants. Nine studies examined problem gambling among incarcerated individuals (Abbott, McKenna, & Giles, 2005;Tessenyi & Kovacs, 2016;Lloyd, Chadwick, & Serin, 2014;Templer, Kaiser, & Siscoe, 1993;May-Chahal, Humphreys, Clifton, Francis, & Reith, 2017;Preston et al, 2012;Pastwa-Wojciechowska, 2011;Turner, Preston, McAvoy, Saunders, & Jain, 2009) and a further eight sampled from individuals seeking treatment for problem gambling from various sources including Gamblers Anonymous and in-and out-patient facilities (Blaszczynski & McConaghy, 1994a, 1994bGranero et al, , 2015Meyer & Stadler, 1999;Martin, MacDonald, & Ishiguro, 2012;Rudd & Thomas, 2016;Ledgerwood, Weinstock, Morasco, & Petry, 2007). Of the remaining studies, three used retrospective analysis of court files, police files and population surveys and statistics (or some combination; Crofts, 2003;Kuoppamäki, Kääriäinen, & Lind, 2014;Arthur, Williams, & Belanger, 2014), two sampled gamblers identified in larger cohort studies (Gorsane et al, 2017;Laursen, Plauborg, Ekholm, Larsen, & Juel, 2016), and one was a review of relevant studies in Spanish and English (Folino & Abait, 2009).…”