Spirometry study in 2,008 #RA patients - compared to controls, RA has a higher risk of restrictive Lung dz (OR 1.36, 95%CI 1.21,1.52) and obstructive LD (OR 1.21, 95%CI 1.07,1.37) independent of confounders like smoking https://t.co/UWViAZL6PO https://t.co/9OBz5ROKhw