• Mohammad Karim Shahrzad, Reyhaneh Gharehgozlou, Sara Fadaei, Parastoo Hajian, and Hamid Reza Mirzaei.
• Department of Internal Medicine and Endocrinology, Shohadae Tajrish Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
• J Res Med Sci. 2022 Jan 1; 27: 56.

BackgroundBreast cancer is among the most common malignancies in women around the world. There is evidence of high prevalence of serum/blood Vitamin D deficiency in Iranian women. Considering the multitude of factors that may be involved in the prognosis and lifespan of breast cancer patients, this study investigated the level of Vitamin D in Iranian patients with nonmetastatic breast cancer.Materials And MethodsThis cross-sectional study was carried out on 214 women diagnosed with breast cancer, who were referred to the radio-oncology department. Serum Vitamin D level of the patients was measured. Prognostic factors were determined based on demographic and pathological characteristics. The results were analyzed using descriptive statistics tests, Chi-square, one-way analysis of variance, Kaplan-Meier, and Cox regression model in SPSS v22. For all cases, the significance level was considered to be P < 0.05.ResultsThe total mean of 25-hydroxyvitamin D serum level was 25.15 ± 17.68 ng/ml. There was no significant relationship between levels of Vitamin D with disease stage, tumor size, tumor grade, estrogen receptor, progesterone receptor, and Human epidermal growth factor receptor 2 (P > 0.05). The mean survival time was 5 years and 45 days.ConclusionNo relationship was found between serum Vitamin D levels and the factors affecting the prognosis of nonmetastatic breast cancer. The Cox analysis showed that the survival time was not influenced by Vitamin D as a prognosis factor.Copyright: © 2022 Journal of Research in Medical Sciences.

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