In a 2009 study, a participatory model of one hundred Mexican-origin colonia residents showed that participants who met the criteria for alcohol dependence showed more symptoms of anxiety and post-traumatic stress than the national average. Investigators found that among Mexican-American immigrants, lifetime prevalence for any anxiety disorder in men was 9% and 18% for women. For Mexican Americans born in the United States, 20% of men and 27% of women met the criteria for anxiety disorders. Mexican Americans living in colonia have considerable health risks due to unsafe living conditions, low educational attainment, high unemployment, comparatively high rates of communicable illness, lack of access to health care, and poverty. Furthermore, the study found that people living in colonias had the highest rates of binge drinking and alcohol dependence correlated with anxiety, traumatic stress, and hopelessness.