The role played by personality disorders in other addictions has encouraged researchers to conduct studies into the links between personality disorders and pathological gambling. A Spanish study compared 50 pathological gamblers, 50 people being treated for other addictions and 50 other unaffected people. 32% of pathological gamblers showed a personality disorder, compared to 16% of the other addicts and 8% of the general population. The most common disorders were borderline personality (16%) followed by antisocial, narcissistic and non-specified personality disorders (8% each).
Echeburua, Enrique and Fernandez-Montalvo, Javier - Are there more personality disorders in treatment-seeking pathological gamblers than in other kinds of patients? A comparative study between the IPDE and the MCMI International Journal of Clinical and Health Psychology 2008, 8(1), 53-64