Subject(s)

Connective Tissue Diseases/mortality , Life Expectancy , Lung Diseases, Interstitial/mortality , Adolescent , Adult , Aged , Aged, 80 and over , Arthritis, Rheumatoid/complications , Arthritis, Rheumatoid/epidemiology , Arthritis, Rheumatoid/mortality , Connective Tissue Diseases/complications , Connective Tissue Diseases/epidemiology , Dermatomyositis/complications , Dermatomyositis/epidemiology , Dermatomyositis/mortality , Female , Humans , Lung Diseases, Interstitial/epidemiology , Lung Diseases, Interstitial/etiology , Male , Middle Aged , Polymyositis/complications , Polymyositis/epidemiology , Polymyositis/mortality , Prevalence , Scleroderma, Systemic/complications , Scleroderma, Systemic/epidemiology , Scleroderma, Systemic/mortality , United States , Young Adult