Tehran University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! On (X network) By
The Prevalence and Determinants of Vitamin D Status Among Older Adults: Data From a Longitudinal Aging Study Publisher



Rezaei O1 ; Sharifi F2 ; Moodi M3 ; Zarban A4 ; Tahergorabi R5 ; Tahergorabi Z6
Authors
Show Affiliations
Authors Affiliations
  1. 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. 2. Department of Geronoto-Epidemiology, Elderly Health Research Center, Endocrinology and Metabolism Research Institute, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Social Determinants of Health Research Center, Birjand University of Medical Sciences, Birjand, Iran
  4. 4. Department of Clinical Biochemistry, School of Medicine, Birjand University of Medical Sciences, Birjand, Iran
  5. 5. Medical Toxicology and Drug Abuse Research Center, Birjand University of Medical Sciences, Birjand, Iran
  6. 6. North Carolina Agricultural and Technical State University, Greensboro, NC, United States

Source: International Journal of Preventive Medicine Published:2023


Abstract

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. © 2023 Wolters Kluwer Medknow Publications. All rights reserved.
Related Docs
1. Serum Vitamin D Levels in Older Adults With and Without Dyslipidemia: A Comparison Using Baseline Data From the Birjand Longitudinal Aging Study (Blas), Clinical Nutrition Open Science (2024)
2. A Perspective on the Sense of Loneliness and Its Determinants in Iranian Older People, Psychogeriatrics (2022)
3. Effect of Physical Activity on Sleep Outcomes Among Iranian Older Adults: A Cross-Sectional Study, Advances in Gerontology (2022)
4. Elderly Studies at the Institute of Endocrine and Metabolic Sciences, Iranian Journal of Diabetes and Metabolism (2021)
5. Dynapenia-Abdominal Obesity and Mortality Risk, Is Independent Effect Obscured by Age and Frailty?:Birjand Longitudinal Aging Study (Blas), Journal of Diabetes and Metabolic Disorders (2024)
6. Low Physical Activity Is the Strongest Factor Associated With Frailty Phenotype and Frailty Index: Data From Baseline Phase of Birjand Longitudinal Aging Study (Blas), BMC Geriatrics (2022)
7. Air Pollution, Environmental Chemicals, and Smoking May Trigger Vitamin D Deficiency: Evidence and Potential Mechanisms, Environment International (2019)
8. Handgrip Strength and Gait Speed Relationships With Cognitive Impairment in Iranian Older Adults: Birjand Longitudinal Aging Study, Geriatric Nursing (2025)
Experts (# of related papers)
View all Related Experts
Farshad Sharifi (7)
Hossein Fakhrzadeh (4)