Study Finds Opioids and Imaging Tests Given Too Often for Low Back Pain
/By Pat Anson, PNN Editor
Many Medicare patients with low back pain receive care that is contrary to clinical guidelines – including opioid medication and advanced imaging tests, according to a large new study.
Researchers looked at Medicare claims for over 162,000 older adults with new low back pain (LBP) from 2011 to 2014. Over half (54%) made only one healthcare visit for LBP, which is consistent with evidence that many new cases of LBP "improve over time regardless of treatment."
It's what happened to the other patients that researchers found concerning.
Opioids were prescribed to about one-fourth of patients overall, and to about a third of those who made two or more visits to have their low back pain treated. Most clinical guidelines for LBP recommend that physical therapy and non-opioid pain relievers such as nonsteroidal anti-inflammatory drugs (NSAIDs) be tried before opioids.
Advanced imaging tests such as cat scans and magnetic resonance imaging (MRI) were ordered for about 15 percent of patients, which is contrary to advice from the American Academy of Family Physicians that most patients don't need advanced imaging for initial evaluation of low back pain.
Physical therapy (PT) was prescribed to only 11 percent of the Medicare patients. Most who were treated with opioids did not receive a prescription NSAID or physical therapy. Chronic opioid use developed in about one percent of patients overall, and nearly two percent of those with two or more visits.
"This study raises concerns about excessive use of low-value and potentially harmful treatments for the common problem of LBP in older adults," said Dan Pham, MD, of Harvard University, who published his findings in the journal Medical Care.
“Although prior research has suggested that PT may forestall the use of opioids in LBP, it is surprising that a high percentage of patients do not receive PT at all and many patients who eventually receive opioids did not first try PT. Similarly, it is surprising that when guidelines suggest that opioids should be a last resort for LBP, many patients on opioids have not yet tried prescription NSAIDs.”
It’s worth noting that Pham’s study only analyzed Medicare data compiled before the release of the 2016 CDC opioid guideline, which led to a widespread campaign to reduce opioid prescribing. Many physicians now refuse to prescribe opioids or only do it at low doses.
Lower back pain is the world’s leading cause of disability. Over 80 percent of us suffer acute low back pain at least once in our lives.
A guideline released by the American College of Physicians in 2017 strongly recommend that physicians treat acute low back pain with exercise and other non-pharmacological therapies. If medication is used, the guideline recommends NSAIDs or muscle relaxers. Opioids are only recommended for patients with chronic back pain who have failed at other treatments.
Some treatment guidelines also take a dim view of imaging for people with acute back pain. Early imaging for lower back pain is not recommended by the Choosing Wisely campaign, an initiative of the ABIM Foundation.
“Most people with lower-back pain feel better in about a month whether they get an imaging test or not. In fact, those tests can lead to additional procedures that complicate recovery,” Choosing Wisely states on its website.
The University of Michigan Center for Value-Based Insurance Design estimates there were 1.6 million unnecessary images for low-back pain in 2014, resulting $500 million in wasted spending. The Center recommends that imaging not be done in the first 6 weeks of low back pain.
A 2015 study found that physical therapy for low back pain significantly lowers healthcare costs by reducing the use of expensive treatments such as spinal surgery, injections and imaging.
