Figure 3. Correlations between both evening and morning HIF-1α protein level and oxygen saturation parameters.

(A) Correlation between evening hypoxia inducible factor (HIF)-1α protein level and total number of desaturations. (B) Correlation between morning HIF-1α protein level and total number of desaturations. (C) Correlation between evening HIF-1α protein level and number of desaturations below 90%. (D) Correlation between morning HIF-1α protein level and number of desaturations below 90%. (E) Correlation between evening HIF-1α protein level and mean hemoglobin oxygen saturation (SpO₂) of desaturation during sleep. (F) Correlation between morning HIF-1α protein level and mean SpO₂ of desaturations during sleep. (G) Correlation between evening HIF-1α protein level and minimal SpO₂. (H) Correlation between morning HIF-1α protein level and minimal SpO₂.