Determinants of vitamin d status among Jordanian employees: Focus on the night shift effect.
Int J Occup Med Environ Health. 2016;29(5):859-70. doi: 10.13075/ijomeh.1896.00657.
Alefishat E1, Abu Farha R2.
Shift Worker and Low Vitamin D Studies in VitaminDWiki
- Shiftwork diseases are often due to lack of vitamin D
- Shift workers 2X more likely to get COVID-19 (low Vitamin D) - Dec 2020
- Reduced Vitamin D status in rotating shift workers in the summer and fall – April 2020
- Shift workers have low vitamin D, poorer sleep, and are more depressed – March 2019
- Employers should give night shift workers free vitamin D – GMB Union June 2019
- Miscarriage 32 percent more likely if work night shift (probably low Vitamin D) – April 2019
- Shiftworkers and Indoor Workers have lower Vitamin D levels – review of 10 studies Sept 2018
- Night cleaners deficient in vitamin D - Nov 2015
- 40 percent lower vitamin D level if work other shifts (Italy) – June 2015
- Night shift workers far more likely to have low vitamin D levels – May 2016
- Allergies and low vitamin D strongly associated with night shift bakers– Sept 2014
- Working other than dayshift reduces vitamin D levels and Bone Mineral Density and increases bone pain – Aug 2013
- Shift workers 23 percent more likely to have cardiovascular events – meta-analysis July 2012
- Shift work increases breast cancer risk by 22 percent (Vitamin D is 1 of 5 possible ways) – Oct 2013
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OBJECTIVES: To assess the association between night work and 25-hydroxy vitamin D (25OHD) levels, and to evaluate effect of potential risk factors on 25OHD levels.
MATERIAL AND METHODS: A total of 140 adult Jordanian employees were recruited. Demographic, lifestyle and working patterns data were documented through a well-structured questionnaire. Vitamin D status was assessed by measuring circulating concentrations of 25OHD.
RESULTS:
Mean 25OHD level was 23.8 ng/ml. No significant difference was found in 25OHD levels between the summer and winter (p = 0.46), or between males and females (p = 0.35). The female night workers had significantly lower serum 25OHD levels compared to the female day workers (p = 0.01). No significant difference in serum 25OHD levels was found between the night and day male workers (p = 0.25). The number of night shifts/month was negatively correlated with 25OHD levels in both the males and females (p = 0.01 and p = 0.007, respectively). Age was positively correlated with 25OHD levels in both the males and females (p = 0.02 and p = 0.001, respectively). Body mass index was negatively associated with 25OHD levels in the whole sample (p = 0.03), but not within each gender group (p = 0.21 for the males and p = 0.09 for the females). Smoking had no significant association with 25OHD levels (p = 0.99 for the males and p = 0.22 for the females).
CONCLUSIONS: Our results suggest that women working night shifts are at higher risk of 25OHD deficiency, and, consequently, of other health problems linked to 25OHD deficiency.
PMID: 27518893 DOI: 10.13075/ijomeh.1896.00657