African Journal of
Medical and Health Sciences

OFFICIAL PUBLICATION OF THE FEDERAL TEACHING HOSPITAL, ABAKALIKI, NIGERIA
  • Abbreviation: Afr. J. Med. Health Sci.
  • Language: English
  • ISSN: 2384-5589
  • DOI: 10.5897/AJMHS
  • Start Year: 2017
  • Published Articles: 28

Full Length Research Paper

Serum 25-hydroxyvitamin D status in non-elderly adults (18-64 years) working indoors at 40° north latitude

Koichiro Okuyama
  • Koichiro Okuyama
  • Department of Orthopedic Surgery, Akita Rosai Hospital, Japan.
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Tadato Kido
  • Tadato Kido
  • Department of Orthopedic Surgery, Akita Rosai Hospital, Japan.
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Naohisa Miyakoshi
  • Naohisa Miyakoshi
  • Department of Orthopaedic Surgery, Akita University School of Medicine, Japan.
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Kimitaka Tajimi
  • Kimitaka Tajimi
  • Department of Orthopaedic Surgery, Akita University School of Medicine, Japan.
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Yoichi Shimada
  • Yoichi Shimada
  • Research Centre of Occupational Injury and Illness, Akita Rosai Hospital, Japan.
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  •  Received: 07 August 2019
  •  Accepted: 30 January 2020
  •  Published: 29 February 2020

Abstract

There are very few reports focusing on a role of vitamin D in falls and the related factors in the non-elderly (18-64 years). A cross-sectional survey was addressed to investigate associations between falls, the related factors, and 25[OH]D3 status in 256 non-elderly adults that regularly work indoors at latitude 40° north region. The mean value of the serum 25[OH]D3 was 15.6 ± 7.0 ng/ml. We divided the serum 25[OH]D3 levels into 3 groups. The deficient, inadequate, and adequate group was at a level of <12.0, 12.0 to < 20, and ≧ 20 ng/ml. Percentage of each group was 35, 38, and 27%. Therefore, 73% of the 256 non-elderly adults working indoors did not have adequate serum 25[OH] D3. Falls prevalence of the past 12 months was 8.9, 5.1 and 11.8%, respectively. The mean age of the 3 groups was 37.2 ± 12.5, 39.7 ± 13.2, and 42.0 ± 13.4 years, and it was significantly older in the adequate group (p<0.01). No associations were found in the prevalence of falls, spinal alignment, bone, muscle status, laboratory data among the 3 groups. Therefore, assessment of Vitamin D status in the non-elderly adults may be less valuable as far as falls and the related factors were concerned.

Key words: 25[OH]D3, falls prevalence, non-elderly indoor workers, 40° north latitude.