Abstract
Pain-related muscle disuse and inflammatory reactions may increase the risk of sarcopenia among older adults with pain. Although several studies have examined the association between pain and sarcopenia, the findings are mixed. In the present study, we examined the association of pain as well as pain intensity and location with incident sarcopenia among community-dwelling older adults and explored whether this association differed between men and women. Pain characteristics, including the presence of pain, intensity (mild, moderate, and severe), and location (multisite, low back, joint, and chest), were self-reported at baseline. Sarcopenia was identified according to the consensus of the Asin Working Group for Sarcopenia 2019 at baseline and 1 year later. Multivariable Poisson regression was used to determine the association of pain status, intensity, and location with incident sarcopenia, respectively. Eight hundred seventy-three participants (67.1± 4.9 years, 524 female) who were free of sarcopenia at baseline were included, of which 64 (7.3%) developed sarcopenia in the follow-up. The presence of pain was significantly associated with an increased risk of incident sarcopenia in older adults (adjusted RR=1.83, 95% CI=1.16-2.89), with a significant risk accumulation in incident sarcopenia upon higher pain intensity. Older adults with multisite pain, low back pain, or joint pain were more likely to develop sarcopenia. Although older men reported a lower prevalence and intensity of pain, their risk of sarcopenia during follow-up was generally more pronounced than older women. Older adults with pain had a significantly higher risk of incident sarcopenia, with a significant risk accumulation in sarcopenia development upon higher pain intensity and specific pain location. Additional attention is needed to identify older adults with pain and to implement timely pain interventions to prevent sarcopenia. High-quality randomized controlled trials are warranted to verify the clinical significance of the present study.
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