Analysis of survival from birth of 30 patients with both RA and DB.

RA: rheumatoid arthritis; DB: diffuse bronchiectasis. Early-onset DB: respiratory symptoms preceding RA by >10 years (mostly childhood DB). CFTR: cystic fibrosis transmembrane conductance regulator gene. A mixed effect Cox model was used, with shared random effects, depending on the kinship coefficient of individuals. The variance of the random effect was 4×10−4. Analysis of survival from birth of 30 patients with both RA and DB.