It was found that those who report a great deal of boredom are more likely to be younger, to be women, to rate their health worse, to be in low employment grades and to report lower physical activity levels. They were also more likely to die from a cardiovascular (CVD) fatal event. Whilst some aspects of life may not be so easily modified (e.g. disease status or position in society), proneness to boredom, particularly in younger populations, could be indicative of harmful behaviours such as excessive drinking, smoking, taking drugs and low psychological profiles.
Source: Britton, A. & Shipley, M.J. Bored to death? International Journal of Epidemiology 2010;1-2 doi:10.1093/lje/dyp404