Rheumatoid interstitial lung disease in Canterbury New Zealand: prevalence, risk factors and long-term outcomes—protocol for a population-based retrospective study

Abstract

IntroductionRheumatoid arthritis (RA) affects approximately 0.5%–1% of the general population. Clinically significant interstitial lung diseases (ILD) develops in just under 10% of people with RA, and subclinical disease is more...