الفهرس 
Introduction and rationaleOnly 14 pages are availabe for public view
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Abstract
Occupational health, safety and hazard pertaining to health care providers is one of the potential areas of occupational medicine that need serious attention. Working the night shift can have significant negative impact on many aspects of a worker’s physical, psychological, and psychosocial health and on that worker’s job performance.
Vitamin D deficiency causes adverse health effects to at-risk individuals. It is hypothesized that night work could alter levels of circulating vitamin D3 due to a reduction of exposure to direct sunlight. In Egypt, published data had focused on vitamin D3 deficiency among women and children as they are considered the vulnerable groups; little interest regarding vitamin D3 status in relation to the working population.
This study aimed to improve health and care of the hospitals nursing staff by studying the relation between night shift-work and 25-hydroxyvitamin D3 deficiency among hospital nursing staff working in Ismailia city. To detect occupational risk factors related to alteration of vitamin D3 level among hospital nursing staff working in Ismailia who works at night shift and those who don’t work with night shift.