In United States alcohol etiology accounts around
50%-55% depending on the study. Layer et al[7] published
a study with patients obtained since 1976 to 1982 and
they found that 56% were heavy drinkers (> 50 g/d) and
present alcoholic etiology. Coté et al[31] published their
results from a multicenter study (2000-2006) in 2010
concluding that alcohol contributes to CP in 45% of the
patients. In 2011, Yadav et al[32] published a populationbased
study with patients from Mayo Clinic in Olmsted
County, MN concluding that 51% presented alcoholic
CP. In these studies patients with alcohol consumption
of > 50 g/d were defined as alcoholic CP.