Vitamin D status and associated metabolic risk factors among North Korean refugees in South Korea: a cross-sectional study. Issue 11 (30th November 2015)

• Record Type: Journal Article
• Authors: Kim, Kyeong Jin; Kim, Yoon Jung; Kim, Sun Hwa; An, Jee Hyun; Yoo, Hye Jin; Kim, Hee Young; Seo, Ji A; Kim, Sin Gon; Kim, Nan Hee; Choi, Kyung Mook; Baik, Sei Hyun; Choi, Dong Seop; Kim, Nam Hoon
• Is Part Of: BMJ open. Volume 5:Issue 11(2015)
• Publication Date: 2015-11-30
• Subjects: Vitamin D deficiency -- North Korean refugees -- Metabolic syndrome -- vitamin D -- Obesity; Medicine -- Research -- Periodicals; 610.72
• DOI: 10.1136/bmjopen-2015-009140
• Languages: English
• ISSNs: 2044-6055

Abstract

Abstract : Objective: Vitamin D deficiency is now recognised as a common health problem associated with various chronic diseases; however, it has not been fully elucidated among the minority groups. Here, we aimed to investigate the prevalence of vitamin D deficiency and its associated metabolic risk factors among North Korean refugees living in South Korea. Design: Cross-sectional analysis from the longitudinal cohort, the North Korean refugee health in South Korea (NORNS) study. Participants: A total of 386 North Korean refugees aged ≥30 years, who measured serum 25-hydroxy vitamin D (25(OH)D) level. Results: The prevalence of vitamin D deficiency (25(OH)D <20 ng/mL) was 87% and no participants had an adequate vitamin D level (25(OH)D ≥30 ng/mL). Underweight participants (body mass index (BMI) <18 kg/m 2 ) had significantly lower 25(OH)D levels than individuals with normal BMI (≥18.5 and<23 kg/m 2 ). In the multivariate logistic regression analysis, the lowest 25(OH)D level (<10 ng/mL) was significantly associated with metabolic syndrome (OR, 6.37, 95% CI 1.34 to 30.3), high triglyceride (OR, 6.71, 95% CI 1.75 to 25.7), and low high-density lipoprotein (OR, 5.98, 95% CI 1.54 to 23.2) compared with 25(OH)D levels ≥20 ng/mL after adjusting for age, sex, season, length of residence in South Korea, physical activity and BMI. Conclusions: Vitamin D deficiency is very common among North Korean refugees in South Korea. Despite their lower BMI, vitamin D deficiency was associated with metabolic syndrome in this population.