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Association between Daily Sunlight Exposure and Fractures in Older Korean Adults with Osteoporosis: A Nationwide Population-Based Cross-Sectional Study

Authors
 Hye Jun Lee  ;  Choon Ok Kim  ;  Duk Chul Lee 
Citation
 YONSEI MEDICAL JOURNAL, Vol.62(7) : 593-599, 2021-07 
Journal Title
YONSEI MEDICAL JOURNAL
ISSN
 0513-5796 
Issue Date
2021-07
MeSH
Absorptiometry, Photon ; Adult ; Aged ; Bone Density ; Cross-Sectional Studies ; Humans ; Nutrition Surveys ; Osteoporosis* / epidemiology ; Republic of Korea / epidemiology ; Sunlight*
Keywords
Sunlight exposure ; fracture ; osteoporosis ; serum vitamin D insufficiency
Abstract
Purpose: We aimed to investigate the association between daily sunlight exposure duration and fractures in older Korean adults with osteoporosis.

Materials and methods: We utilized data from the 2008-2011 Korea National Health and Nutrition Examination Survey. Osteoporosis was diagnosed based on a T-score of ≤-2.5 using dual energy X-ray absorptiometry. The duration of daily sunlight exposure and fracture were assessed via intensive health interviews by trained staff using standardized health questionnaires. Fracture was defined as one or more fractures of the femur, wrist, and spine.

Results: A total of 638 patients with osteoporosis aged ≥65 years were included. The odds ratio (OR) of total fractures was 0.55 times lower in the group with ≥5 h of daily sunlight exposure than in the group with <5 h of exposure after adjusting for age, sex, family history of osteoporosis or fracture, body mass index, bone mineral density of the femoral neck, serum 25-hydroxyvitamin D, current smoking, alcohol intake, daily calcium intake, and physical activity [95% confidence interval (CI) 0.31-0.97, p=0.040]. In patients with vitamin D insufficiency, the OR of total fracture was 0.52 times lower in the group with ≥5 h of daily sunlight exposure than in the group with less exposure after adjusting the above variables (95% CI 0.28-0.97, p=0.041).

Conclusion: Sunlight exposure for ≥5 h a day was significantly associated with a decreased OR of fracture in older Korean adults with osteoporosis. This association was also significant in patients with vitamin D insufficiency.
Files in This Item:
T999202154.pdf Download
DOI
10.3349/ymj.2021.62.7.593
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Biomedical Systems Informatics (의생명시스템정보학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Family Medicine (가정의학교실) > 1. Journal Papers
Yonsei Authors
You, Seng Chan(유승찬) ORCID logo https://orcid.org/0000-0002-5052-6399
Lee, Duk Chul(이덕철) ORCID logo https://orcid.org/0000-0001-9166-1813
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/190468
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