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ORIGINAL ARTICLE
Year : 2015  |  Volume : 56  |  Issue : 6  |  Page : 416-419

Independent and joint effects of serum 25-hydroxivitamin D and calcium on breast cancer ratio in an Iran population: Across-sectional study


1 Department of General Surgery and Environmental Health Engineering, Breast Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
2 Department of General Practitioner, International Campus of Shahid Sadoughi University of Medical Sciences, Yazd, Iran
3 Department of General Practitioner, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
4 Department of Biostatics and Epidemiology, Shahid Sadoughi University of Medical Sciences, Yazd, Iran

Correspondence Address:
Mohaddeseh Aboueian-Jahromi
Department of General Surgery and Environmental Health Engineering, Breast Diseases Research Center, Shahid Sadoughi University of Medical Sciences, Yazd
Iran
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0300-1652.171621

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Background: It has been suggested that Vitamin D and calcium have protective effects against breast cancer. The results about breast cancer and serum Vitamin D and calcium levels are still controversial, indefinite, and insufficient to determine the amount of nutritional needs. Thus, we investigated the association between serum 25-hydroxyvitamin D(25-OH-D) and calcium on the ratio of breast cancer at diagnosis time. Materials and Methods: We carried out a hospital-based cross-sectional study in a population of Iran. It comprised 57 breast cancer cases, who were newly diagnosed, and 85 controls in 2013. The serum 25-OH-D and calcium levels were measured. Results: There was not any significant association between 25-OH-D and breast cancer ratio. Odds ratio (OR) comparing the highest quartile to the lowest quartile was 1.03(95% confidence interval[CI] 0.33–3.22, P-trend 0.95). Having sufficient (>75 nmol/L) serum 25-OH-D levels compared to insufficient serum 25-OH-D levels was not associated with a significantly decreased ratio of breast cancer (OR 0.55, 95% CI 0.23–1.29, P = 0.17). Furthermore, an association between calcium and breast cancer did not get statistical significance (OR 0.51, 95% CI 0.17–1.49, P-trend 0.31). The joint effect was negative interaction. Conclusion: Vitamin D and calcium do not act on decreasing ratio of breast cancer. Decreasing ratio of breast cancer in relation to serum calcium and Vitamin D level at diagnosis time needs more assessments.


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