Mayo study of 1643 #RA pts (Dzduration 7 yrs) found 4 clusters based on # of comorbidities (Cluster 1 [42%] few comorbidities & cluster 4 [7%] > 10). Cluster 1 w/ good prog/survival; but cluster 4 was older, less DMARDs/biologics https://t.co/NTJvuBujdp https://t.co/wZycwYDfFS