Association of Vitamin D with Diet Quality, Sun Exposure, Physical Activity, Sociodemographic and Anthropometrics Indices

Document Type : Original Article


1 Nutrition Research Center, Department of Clinical Nutrition, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran

2 Department of Epidemiology, Shiraz University of Medical Sciences, Shiraz, Iran


Background: Vitamin D has been linked to health conditions and many serious diseases including cardiovascular, diabetes, and cancer. This study was conducted to determine the correlation between vitamin D
with diet quality, sun exposure, physical activity, sociodemographic, and anthropometrics indices.
Methods: In a cross-sectional study, 180 subjects (90 males and 90 females) aged from 14 to 57 years were enrolled. A questionnaire was used to collect sociodemographic and anthropometric data, physical activity and food intake information. The correlation between serum vitamin D with these variables was analyzed.
Results: Significant difference was noted between two genders regarding age, weight, body mass index, waist circumference, job, income, physical activity, LDL, HDL, TG, and cholesterol. Low quality diets denoted to a mean global score of 47±6.3 and 46±6.4 in male and females, respectively. No significant difference was found between diet quality, calcium intake (1310±734 mg), and vitamin D intake (1.8±1.5 mg) with serum vitamin D level. Further analysis revealed that there was a significant positive correlation between cholesterol and saturated fat intake and serum vitamin D. Between two genders, the correlation between physical activity (p<0.005), sitting time(p<0.04), and income(p<0.04) with serum vitamin D level was significant.
Conclusion: Based on significant correlation between serum vitamin D level, with cholesterol, saturated fat intake, physical activity and income, we can conclude that physical activity has correlation with a favorable vitamin D status.