Survival and future need of long-term oxygen therapy for chronic obstructive pulmonary disease - gender differences
We aimed to study trends in gender-related differences in incidence, and prevalence for tong-term oxygen therapy due to chronic obstructive pulmonary disease. Another aim was to study survival after onset of oxygen therapy. Prospectively followed were 5689 Swedish patients, who were prescribed oxygen therapy because of chronic obstructive pulmonary disease from 1987 to 2000. The annual incidence o