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Table 1.

Baseline characteristics in oxygen-dependent chronic obstructive pulmonary disease patients.

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Table 2.

Cox regression of daily oxygen duration and adjusted mortality in 2,249 patients with COPD.

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Fig 1.

Cumulative risk of death for LTOT 24 h/day (N = 539) versus 15–16 h/day (N = 1,231) in oxygen-dependent COPD.

The hazard ratio was 0.98 (95% CI, 0.85 to 1.14); adjusted for baseline age, sex, oxygen dose, PaO2 (air), PaCO2 (air), FEV1, WHO performance status, body mass index, treatment with oral glucocorticoids, and comorbid diagnoses including anxiety, renal failure and number of cardiovascular diagnoses.

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