• Users Online: 4170
  • Home
  • Print this page
  • Email this page
Home About us Editorial board Ahead of print Browse Articles Search Archives Submit article Instructions Subscribe Contacts Login 
Year : 2023  |  Volume : 14  |  Issue : 1  |  Page : 27

The prevalence and determinants of vitamin D status among older adults: Data from a longitudinal aging study

1 Instructor of Environmental Toxicology, Social Determinants of Health Research Center, Department of Occupational Health, School of Health, Birjand University of Medical Sciences, Birjand, Iran
2 Department of Geronoto-Epidemiology, Elderly Health Research Center, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran
3 Social Determinants of Health Research Center, Birjand University of Medical Sciences, Birjand, Iran
4 Department of Clinical Biochemistry, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran
5 Medical Toxicology and Drug Abuse Research Center, Birjand University of Medical Sciences, Birjand, Iran
6 North Carolina Agricultural and Technical State University, Greensboro, NC, USA

Correspondence Address:
Zoya Tahergorabi
Department of Physiology, School of Medicine, Birjand University of Medical Sciences, Ghafari Street, Birjand
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijpvm.ijpvm_366_21

Rights and Permissions

Background: Aging is identified as a risk factor for vitamin D deficiency (VDD) therefore this investigation was designed to determine the prevalence of VDD and its determinants in a sample of older adults. Methods: The data of this study were obtained from the baseline wave of the Longitudinal Aging Study (LAS). Demographic, past medical history, medication history, and smoking behavior were collected using an interview approach. The physical activity and nutritional status of the participants were assessed using a standard questionnaire. Anthropometric indices were measured according to a standard protocol then body mass index (BMI) was calculated. Serum vitamin D and calcium levels were measured by autoanalyzers. Univariate and multiple logistic regression models were applied to detect the associated factors with VDD. Results: Mean age of the participants was 71.82 (SD = 7.63) years. A total of 1319 people participated in our study, and 51.16% (n = 688) were female. A total of 8.42% (n = 111) of the participants had VDD and 17.06% of them (n = 225) had insufficient vitamin D levels. In the multivariable logistic regression model, the age group of 70–79 years in comparison with the age group of 60–69 years had a 43% less chance of VDD. Furthermore, being overweight (OR = 0.36, P = 0.01) and obese (OR = 0.35, P = 0.02), and taking vitamin D supplements (OR = 0.31, P = 0.04) were significantly associated with VDD. Conclusions: Our results showed that 25% of older adults had vitamin D deficiency or insufficiency. In addition, some modifiable lifestyle factors were associated with VDD. Given that, old age is considered a risk factor for VDD. Therefore, detection and improvement of VDD may be a preventive measure in at-risk subjects.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded105    
    Comments [Add]    

Recommend this journal