Plasma Orexin-A Levels in COPD Patients with Hypercapnic Respiratory Failure

Figure 1

(a) Relationship between BMI and orexin-A. (b) Relationship between %fat and orexin-A. (c) Relationship between PaO₂ and orexin-A. (d) Relationship between SaO₂ and orexin-A. In patients with COPD, plasma orexin-A levels significantly correlated with BMI (𝑟=0.589, 𝑃=.000), %fat (𝑟=0.367, 𝑃=.020), PaO₂ (𝑟=−0.738, 𝑃=.000), SaO₂ (𝑟=−0.616, 𝑃=.000).

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