Matched cohort Nurses’ Health Study looked at 283 pre‐RA pts (mean 9.7 years before RA Dx) and and 842 controls; 21% pre‐RA were ACPA+. ACPA+ was associated with increased risk of COPD (HR 3.04) that was not seen in ACPA- pts. https://t.co/HNB11eAiva