, according to a study published online March 20 in .
, of the University of Pennsylvania, Philadelphia, and his coauthors wrote that previous studies had suggested a link between moderate alcohol consumption and lower disease activity, better quality of life, and better functional status in people with rheumatoid arthritis. This link may tempt clinicians “to encourage moderate alcohol consumption among patients with RA,” the researchers wrote, and so it prompted them to examine the relationship more closely.
The researchers studied 16,762 individuals with rheumatoid arthritis in the National Databank for Rheumatic Diseases who had been asked about alcohol use and disease activity in a series of semiannual surveys, providing a total of 121,280 observations, at which 53% reported using alcohol.
Across the observations taken from the semiannual surveys, a total of 8.2% reported discontinuing alcohol consumption from one survey to the next, and 8.4% of abstainers reported initiating alcohol use. Importantly, individuals with high disease activity had a significantly shorter time to discontinuation of alcohol, and those with a moderate or high Patient Activity Scale-II (PAS-II) score were 36% more likely to stop alcohol consumption, compared with individuals who had a low PAS-II score.
Individuals who were older or obese or had more comorbidities or greater work disability were all independently more likely to discontinue alcohol use, while those less likely to give up alcohol tended to be white, male, and have higher physical and mental quality of life, higher educational level, and greater household income.
Participants with moderate or high PAS-II scores were also less likely to start consuming alcohol in comparison to those with low scores.
“Overall, these observations suggest that patients with RA are substantially less likely to use alcohol when their disease activity is high and their health and quality of life are poor,” the authors wrote. “This study also found that active drinking, recent discontinuation of drinking, and recent initiation of drinking were not associated with disease activity or death in this population when considering the reasons for the changes in behavior.”
They said this offered a different explanation for the previously observed association between alcohol use and lower disease activity by showing an effect of reverse causality rather than any biologically protective effect of alcohol.
While the study also found a strong link between discontinuation of alcohol use and increased subsequent mortality, they suggested this was also likely a function of disease activity and disability, rather than the effect of giving up alcohol.
The study was funded by grants to several authors from the Department of Veterans Affairs, the National Institutes of Health, and the Rheumatology Research Foundation. Dr. Baker reported receiving consulting fees from Bristol-Myers Squibb outside of the current work.
SOURCE: Baker J et al. Arthritis Care Res. 2019 Mar 20. .