Figure 1From: Respiratory symptoms and disease characteristics as predictors of pulmonary function abnormalities in patients with rheumatoid arthritis: an observational cohort studySchematic of screening for a patient with rheumatoid arthritis and without known lung disease. Application of the described algorithm to a model patient demonstrates how the probability of pulmonary function test (PFT) abnormality varies with specific patient features. See Additional file 3 for calculated probabilities based on the presence of different combinations of predictors. CCP, cyclic citrullinated peptide.Back to article page