Zahra Amiri - Department of Pure Mathematics, Center of Excellence in Analysis on Algebraic Structures (CEAAS), Ferdowsi University of Mashhad, P.O. Box ۱۱۵۹, Mashhad ۹۱۷۷۵, Iran.
Fahimeh Moafian - Department of Pure Mathematics, Center of Excellence in Analysis on Algebraic Structures (CEAAS), Ferdowsi University of Mashhad, P.O. Box ۱۱۵۹, Mashhad ۹۱۷۷۵, Iran.
Payam Sharifan - International UNESCO Center for Health-Related Basic Sciences and Human Nutrition, Mashhad University of Medical Sciences, Mashhad, Iran.
Elahe Hasanzadeh - Student Research Committee, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Zahra Khorasanchi - Department of Nutrition, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Moniba Bijari - International UNESCO Center for Health-Related Basic Sciences and Human Nutrition, Mashhad University of Medical Sciences, Mashhad, Iran.
Maryam Mohammadi Bajgiran - International UNESCO Center for Health-Related Basic Sciences and Human Nutrition, Mashhad University of Medical Sciences, Mashhad, Iran.
Sara saffar soflaei - International UNESCO Center for Health-Related Basic Sciences and Human Nutrition, Mashhad University of Medical Sciences, Mashhad, Iran.
Susan Darroudi - International UNESCO Center for Health-Related Basic Sciences and Human Nutrition, Mashhad University of Medical Sciences, Mashhad, Iran.
Hamideh Ghazizadeh - International UNESCO center for Health Related Basic Sciences and Human Nutrition, Mashhad University of Medical Sciences, Mashhad, Iran.
fatemeh rouhi - Student Research Committee, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Fatemeh Mohseni nik - Student Research Committee, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Maryam Tayefi - Norwegian Center for E-Health Research, University Hospital of North Norway, Tromsø, Norway.
Samira roohi - Student Research Committee, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Ayad Noor - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
Abdullah Al yakobi - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
Mohammed Hadi Lafta Alboresha - Department of Biology, Faculty of Sciences, Mashhad Branch, Islamic Azad University, Mashhad, Iran.
Gordon A. Ferns - Division of Medical Education, Brighton & Sussex Medical School, Falmer, Brighton, Sussex, UK.
Habibollah Esmaily - Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran.
Majid Ghayour-Mobarhan - International UNESCO center for Health Related Basic Sciences and Human Nutrition, Mashhad University of Medical Sciences, Mashhad, Iran.

Introduction:  Serum vitamin D levels are related to a wide spectrum of factors including low sunlight exposure, high oxidative stress, low physical activity and sleep disorders. In this paper we are going to investigate the most crucial parameters associated with serum vitamin D levels in survey of ultraviolet intake by nutritional approach (SUVINA) study with a data mining approach.Material and Methods: Data including demographic, anthropometric, clinical and laboratory information were extracted from the SUVINA dataset comprising ۲۸۹ subjects who were enrolled into our study. The XGBoost algorithm was used to define the most important features related to vitamin D level in our population.Results: Applying XGBoost modeling for vitamin D level showed that the presented scheme can determine the most important determinants of serum vitamin D level with an accuracy of ۹۱%. Pro-oxidant anti-oxidant balance (PAB), body fat percentage, physical activity level (PAL), age, restless leg syndrome (RLS), and dietary inflammatory index (DII) density were the most important variables correlated with vitamin D deficiency.Conclusion: Using XGBoost and with an accuracy of more than ۹۰%, we showed that the six most important risk factors for vitamin D deficiency are PAB, PAL, age, body fat percentage, RLS and DII density, respectively.

Vitamin D, Oxidative stress, Machine Learning, Data Mining Algorithm