In the largest study to date that examines post-traumatic stress disorder (PTSD) as a risk factor for cancer, researchers from Boston University School of Medicine (BUSM), have shown no evidence of an association.

The study, which appears in the European Journal of Epidemiology, is consistent with other population-based studies that report stressful life events generally are not associated with cancer incidence. In addition to corroborating results of other studies, this large population sample allowed for important stratified analyses that showed no strong evidence of associations even among select groups of the population.

The association between stress and cancer has been discussed in scientific literature for more than 70 years. Despite plausible theories that would support this association, findings from clinical research have been mixed.

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