Long-term glucocorticoid use discouraged
Daily doses of less than 5 mg were not associated with higher MACE risk, but more research is necessary to understand whether these low doses are clinically efficacious, Dr. Tam said. “The study results suggest that a very-low-dose GC (less than 5 mg prednisolone daily) may be cardiovascular risk–neutral. However, further evaluation is needed to determine whether this dose is therapeutic. Other potential side effects, such as bone loss, increased infection risk, dyslipidemia, and hyperglycemia, should also be considered.”
Both the American College of Rheumatology and the European Alliance of Associations for Rheumatology acknowledge that short-term GCs may be necessary for some RA patients, but they emphasize using the smallest necessary dose for the shortest period possible because of the known toxicity of GCs.
“We recommend stopping GCs as soon as it is clinically feasible, in line with previous recommendations, until these issues are investigated further,” Dr. Tam added.
Dr. Bartels agreed that long-term use of GCs should be avoided if possible, even at lower doses, because although CV risk may be less of an issue, studies have shown an increased risk for infection even at GC doses of less than 5 mg a day.
How might risk increase with dose?
While the study showed a distinct difference in risk with doses of prednisolone higher and lower than 5 mg, more information on how risk increases with dose could be useful, said Beth Wallace, MD, an assistant professor in internal medicine at the University of Michigan, Ann Arbor, and a staff rheumatologist at the VA Ann Arbor Healthcare Center. She was also unaffiliated with the research. “If someone is on 5-10 mg ... how much better is that than being on 10-20 mg or being on 20-30 mg?” she asked. While these study findings are “very important,” she said, it would be useful to know the risk associated with 7.5 mg vs. a higher dose.
University of Michigan
Dr. Beth Wallace
But even in this relatively healthy population in Hong Kong, “taking more than 5 mg of prednisolone doubles the risk of cardiovascular disease,” Dr. Wallace added. This is important for clinicians to know, especially if they are more cautious about prescribing steroids to older or sicker patients but are “using [the drugs] a little more indiscriminately in younger people and healthier people.”
The study did not receive outside funding. Dr. Tam and Dr. Bartels report no relevant financial relationships. Dr. Wallace has received a grant from the Department of Veterans Affairs Administration to study steroid tapering in RA.
A version of this article first appeared on Medscape.com.