Several studies on fatigue among healthcare workers have shown strong relationships between physical and emotional stresses and fatigue symptoms. For example, fatigue in nurses was more severe among those who felt physical pain or emotional issues.
Shortage of sleep and irregular eating behaviors, which are characteristic of the shift-work system of nurses, were associated with fatigue symptoms and adverse health conditions.
On the other hand, a study of fatigue among family caregivers for cancer patients indicated that the length of the caregiving period did not influence fatigue, but the daily schedule became a burden that increased feelings of fatigue.
However, little is known about the caregivers targeted in this study, due to the scarcity of research on those who are neither nurses nor family members