Introduction: The aim of this study was to identify and analyze the stress factors and the level of stress a year preceding the onset of breast cancer and depression in the studied female patients.
Methods: The research in this work was mostly prospectively (clinical and analytical). During the research, Scale of Life Events-Paykel was applied. Stressful life events differed significantly between the groups. In the studied group, the following events were significantly more prevalent: partner infidelity (χ2 = 12.663; p < .001), failure at work (χ2 = 44.429; p < .001), and spontaneous abortions or stillbirths (χ2 = 13.818; p < .001).
Results: According to the results of this study, stressful life events differed significantly between the observed groups. These stressful life events had a significant impact on the increase of risk for breast cancer, as well as on depressivity. Afterward, adaptive neuro-fuzzy inference system was used for prediction of the Paykel's Life Event according to Fisher's exact test.
Conclusion: The obtained results could be of practical usage for improving stress behavior of the patients with breast cancer and depression.
Keywords: adaptive neuro-fuzzy inference system; breast cancer; depressivity; prediction; stress.
© 2020 The Authors. Brain and Behavior published by Wiley Periodicals, Inc.