The proportion of people suffering from long term, impairing low back pain has more than doubled in North Carolina since the early 1990s, according to a new study.
What's more, researchers believe the increase may be indicative of a similar trend across the country.
In the study, published in the Feb. 9, 2009, issue of the Archives of Internal Medicine , researchers from the Cecil G. Sheps Center for Health Services Research at the University of North Carolina at Chapel Hill found that the prevalence of chronic, impairing low back pain in the state increased from 3.9 percent in 1992 to 10.2 percent in 2006. Increases were seen in both men and women, and across all ages and racial and ethnic groups.
"Considering the social and economic costs of chronic low back pain, these findings are alarming," said the study's principal investigator Timothy S. Carey, M.D., director of the Sheps Center and Sarah Graham Kenan Professor in the departments of medicine and social medicine in the UNC School of Medicine. "Low back pain is the second most common cause of disability in the United States and a common reason for missing work."
"People with chronic low back pain also use an enormous amount of health care," said the study's lead author, Janet K. Freburger, Ph.D., a research associate and fellow at the Sheps Center and a research scientist at the UNC Institute on Aging.
Carey and Freburger noted that more than 80 percent of Americans will experience an episode of low back pain at some time in their lives and that total costs of the condition are estimated at greater than $100 billion annually, with two-thirds of that due to decreased wages and productivity.
"Since the costs of back pain are rising, along with the number of cases, current treatments overall do not seem to be very effective," Carey said.
The study is thought to be the first in the United States to use similar methods and a consistent definition of chronic low back pain to examine trends in the condition's prevalence over time.
The new findings also provide a possible explanation for rising health-care costs associated with back problems.
Some researchers have concluded that increases in the use of health-care services for low back pain are due to people with low back pain seeking more care nowadays than in the past.