Fatemeh Mirzaei - MSc in Midwifery, Faculty of Nursing and Midwifery, Tabriz University of Medical Sciences, Tabriz, Iran.
Azizeh Farshbaf-Khalili - Aging Research Institute, Physical medicine and rehabilitation Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran.
Roghaiyeh Nourizadeh - PhD in Reproductive Health, Midwifery Department, Faculty of Nursing and Midwifery, Tabriz University of Medical Sciences, Tabriz, Iran.

Introduction & Aim: Breast cancer is the most common cancer in women worldwide. Illness perception is Important issues affect cancer control and management. The aim of this study was to determine the illness perception and its predictors in women with breast cancer undergoing chemotherapy and radiotherapy. Methods: The present cross-sectional study was conducted on 190 women with breast cancer who referred to the oncology centers of Arak, Iran, for chemotherapy and radiotherapy. Participants were recruited using convenience sampling method from September 2017 to May 2018. Data were collected using Demographic and disease characteristics questionnaires, Illness Perception Questionnaire, Quality of Life-Cancer 30 and Supportive Care Needs Survey –Short Form 34. Data were analysed using SPSS ver.24, one-way ANOVA, Chi square, independent t-test, Pearson correlation coefficient and multivariate linear regression. Results: The mean (standard deviation) score of illness perception was 38.9 (13.1) (range from 0-80). There was no significant difference in terms of illness perception between patients in the chemotherapy and radiotherapy groups (p> 0.05). The type of breast disease and the last time the cancer diagnosed, spouse’s age were predictors of perception of illness. Conclusion: As respects with Spend a period when diagnosing a disease, According to less stress and perception of illness as the deases is diagnosed, so at, early stages of diagnosis of this disease more Psychosocial and social support is required to adjust.