Tehran University of Medical Sciences Acta Medica Iranica 0044-6025 54 2 2016 03 12 146 150 EN Hamid Rajebi Department of Radiology, SUNY Upstate Medical University, Syracuse, NY, USA. Ahmad Khodadad Department of Gastroenterology, Pediatrics Center of Excellence, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran. Golshan Fahimi School of Medicine, Urmia University of Medical Sciences, Urmia, Iran. Hassan Abolhassani Research Center for Immunodeficiencies, Children’s Medical Center, Tehran University of Medical Sciences, Tehran, Iran. 2015 10 15 2016 01 18 Vitamin D deficiency is one of the most preventable challenges worldwide. The aim of this study was to determine the prevalence of vitamin D deficiency among female nurses working at Children’s Medical Center Hospital in Tehran, Iran, due to the risk factor of being a notably long period indoors and the fact that their health status may have consequences on the process of patients’ treatment. A total of 114 female nurses who were at least 20 years old entered the study voluntarily, and a questionnaire was applied to collect information on lifestyle and other factors associated with vitamin D deficiency. A sample of blood was taken to measure 25-hydroxyvitamin D (25-OHD) and cut off value to indicate deficiency was considered below 10ng/ml, and the amounts of 10-29ng/ml were declared insufficient. The mean of 25-OHD was 11.7±9.3ng/ml. A total of 79 subjects (69.3%) had a deficient level of vitamin D, 28 subjects (24.6%) had an insufficient level and only 7 subjects (6.1%) had sufficient level of vitamin D. The deficiency was more noticeable in the age group of 26-35 years old. Prevalence of vitamin D deficiency had a significant correlation with younger subjects (P<0.001). There was no significant association among other factors such as body mass index (BMI), health status complications, regular exercise, and duration of sun exposure. High prevalence of vitamin D deficiency in the study population leads to emphasise the need to screen health care workers for vitamin D levels. https://acta.tums.ac.ir/index.php/acta/article/view/4964 https://acta.tums.ac.ir/index.php/acta/article/download/4964/4759