Sing an ARIAA! #Bestinclass Rx of arthralgia w +MRI showed delay of #rheumatoid arthritis w #Abatacept vs #placebo. NNT to prevent 1 RA [is 8 w Rx for 1 yr & then d/c-Yrs ago #MTX delayed onset of RA but benefit waned after d/c Rx. Both ?RA spectrum POS0531 @RheumNow #EULAR2022