CORVITAS RA registry shows poor biologic responses in Severe obesity (BMI >35) & underweight (<18.5) w/ no diff between 2891 TNFi vs 3010 non-TNFi users. Severe obesity lower odds of LDA, MCID, CDAI ~10-20% UnderWt ~50-70% https://t.co/iMvlyo4UKx https://t.co/JTQ6aRVTpH