Determinants of vitamin D status
among Jordanian employees:
Focus on the night shift effect

Alefishat, Eman; Farha, Rana Abu

doi:10.13075/ijomeh.1896.00657

Cited by 23 publications

(17 citation statements)

References 59 publications

(77 reference statements)

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“…Mizoue et al [ 28 ] found low 25(OH)D concentrations more frequent in young, female, and smokers, engaged in shiftwork and overtime work. Alefishat and Farha [ 29 ] evaluated vitamin D status in female night workers that showed significantly lower serum 25(OH)D levels compared to the female day workers ( p =0.01). The number of night shifts/month was negatively correlated with 25(OH)D levels in both the males and females ( p =0.01 and p =0.007).…”

Section: Resultsmentioning

confidence: 99%

Are Shiftwork and Indoor Work Related to D3 Vitamin Deficiency? A Systematic Review of Current Evidences

Coppeta

Papa

Magrini

2018

Journal of Environmental and Public Health

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Background Reported cases of vitamin D3 deficiency have been increasing in incidence worldwide. Although there is a lack of consensus relating to optimal levels of vitamin D, generally serum 25-(OH)D concentrations lower than 50 nmol/L (20 ng/mL) are at least considered to be detrimental to bone health. Aim Aim of this systematic review is to investigate if occupations, and specifically shiftworking and indoor working, may be considered as possible contributors to the increased incidence of vitamin D3 deficiency in industrialized nations. Materials and Methods Systematic review was performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement using PubMed, Scopus, and ISI Web of Knowledge databases. Results Overall 90 papers were found, 23 articles through PubMed, 30 through Scopus, and 37 through ISI Web of Knowledge. Successively, 46 duplicates and 34 articles that did not respect the inclusion criteria were excluded. Finally 10 articles were selected: 9 cross-sectional studies and 1 systematic review. Results of the studies included revealed that certain occupations are either suffering from, or have a predilection to suffer from, a deficiency of this vitamin. Shiftworkers and indoor workers are consistently reported as being the occupational group most likely to suffer from a deficiency of vitamin D3. It would appear prudent to investigate the potential of providing nutritional education to workers in addition to including preventative measures in the workplace.

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Section: Resultsmentioning

confidence: 99%

Are Shiftwork and Indoor Work Related to D3 Vitamin Deficiency? A Systematic Review of Current Evidences

Coppeta

Papa

Magrini

2018

Journal of Environmental and Public Health

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“…Several studies have shown that subjects with the adequate serum 25(OH)D concentration and high vitamin D intake have a more favorable lipid profile than those with vitamin D deficiency [3,22,41,[43][44][45][46]. The most often observed changes include a vitamin D-induced decrease in triglycerides and an increase in HDL-C.…”

Section: Discussionmentioning

confidence: 99%

“…Substantial correlations were found mainly among individuals with BMI ≥30 kg/m 2 . The most probable explanation for the significant results limited to persons with excess weight may be the fact that obesity is often associated with lower 25(OH)D concentrations in comparison to normal-weight individuals [22,29,30]. The most important relationship was observed in the context of blood pressure regardless of gender.…”

Section: Discussionmentioning

confidence: 99%

“…In most, but not all [17][18][19] studies, vitamin D supplements have had a beneficial effect on the blood glucose level, lipids, body fat mass, blood pressure and oxidative stress mediators [20,21]. Interestingly, most studies have been conducted in western and tropical countries, where exposure to sunlight is significant [3,4,10,16,22]. Little is known about the relationship between vitamin D intake and metabolic profiles in countries with relatively low insolation.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vitamin D – dietary intake, supplementation and metabolic status of Polish adults.

Kamińska

Pikala

Dziankowska-Zaborszczyk

et al. 2020

Int J Occup Med Environ Health

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Objectives: Contrary to popular opinion on the preventive properties of vitamin D, results of previous studies have been inconclusive. The aim of this research was to evaluate the associations between the intake of vitamin D and metabolic abnormalities in a representative sample of Polish adults. Material and Methods: Within the framework of the Multi-Center National Population Health Examination Survey (referred to as WOBASZ), a random sample of 2381 adult residents of Poland (53.8% of whom were women) was examined. All the study subjects were extensively reviewed, including 24-h dietary recall. The intake of vitamin D was assessed on the basis of dietary and supplements reviews. Metabolic abnormalities were evaluated using measurements of waist circumference (WC), blood pressure (BP), serum triglycerides (TG), high-density lipoprotein cholesterol (HDL-C) and fasting glycemia. Metabolic syndrome was defined according to the International Diabetes Federation. Results: Of all the study participants, about 4.4 % of women and 2.6% of men declared a regular supplementation of vitamin D. Among women, a significant inverse correlation between vitamin D supplementation and the mean systolic BP was found (p < 0.01). A more substantial relationship was noted after dividing the study subjects according to their body mass. Among obese men, there was a significant inverse relationship between vitamin D intake and the mean systolic BP (p < 0.01) and diastolic BP (p < 0.05), as well as a positive correlation with HDL-C (p < 0.05). Among obese women, a negative correlation was found between vitamin D supplementation and the mean systolic BP (p < 0.01) and diastolic BP (p < 0.05), and a positive correlation with TG (p < 0.05). Among non-obese male subjects, a negative correlation between vitamin D intake and WC was observed. Conclusions: The obtained findings suggest that the correlation between vitamin D intake and metabolic abnormalities may depend on the obesity status. A higher vitamin D intake may reduce BP and increase HDL-C in obese subjects. The positive relationship between vitamin D intake and TG concentration in women needs further investigation. Int J Occup Med Environ Health. 2020;33(1):107 -18

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“…Furthermore, conversation with control room employees revealed that they generally prefer to go outdoors for sunlight exposure due to their nature of work in dark environments. These factors probably offset the higher risk of vitamin D deficiency in control room workers due to night shifts [26,27] Night shift workers, due to their working hours and daytime sleeping, are generally exposed less to solar UV-B irradiation [28].…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Vitamin D Deficiency and Its Associated Work-Related Factors among Indoor Workers in a Multi-Ethnic Southeast Asian Country

Divakar

Sathish

Soljak

et al. 2019

IJERPH

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Little is known about the effect of working conditions on vitamin D status in Southeast Asia, where vitamin D deficiency is common despite the presence of sunlight all year round in most places. We examined the prevalence of vitamin D deficiency and its associated work-related factors among indoor workers using the data of 213 participants (aged ≥21 years) from a workplace cohort study in Singapore. Vitamin D deficiency was defined as serum 25-hydroxyvitamin D (25(OH)D) concentration <50 nmol/L. Data on work-related factors, socio-demographic characteristics, and lifestyle habits were collected using standardized questionnaires. Clinical and biochemical measurements were performed using standard tools and protocols. Multivariate Poisson regression was used to examine the independent association of work-related factors with vitamin D deficiency. Mean serum 25(OH)D concentration was 59.6 nmol/L. The prevalence of vitamin D deficiency was 32.9% (95% confidence interval (CI): 26.6–39.6%). In the multivariate analysis, office workers (prevalence ratio (PR): 2.16, 95% CI: 1.12–4.16 versus control room workers), workshop workers (PR: 2.25, 95% CI: 1.05–4.81 versus control room workers), and night shift workers (PR: 1.31, 95% CI: 1.03–1.67) were at a greater risk for vitamin D deficiency. Workplace policies and wellness programs should encourage workers to take regular breaks to go outdoors for sunlight exposure and to consume adequate amounts of vitamin D-rich foods to maintain optimal vitamin D levels.

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Determinants of vitamin D status among Jordanian employees: Focus on the night shift effect

Cited by 23 publications

References 59 publications

Are Shiftwork and Indoor Work Related to D3 Vitamin Deficiency? A Systematic Review of Current Evidences

Are Shiftwork and Indoor Work Related to D3 Vitamin Deficiency? A Systematic Review of Current Evidences

Vitamin D – dietary intake, supplementation and metabolic status of Polish adults.

Prevalence of Vitamin D Deficiency and Its Associated Work-Related Factors among Indoor Workers in a Multi-Ethnic Southeast Asian Country

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