CD8A and obstructive sleep apnea syndrome: To compare the transcriptional profiles of immune cell subpopulations, we evaluated the abundance of 24 immune cell types in OSA using ImmuCellAI and found a higher abundance of CD8+ T, Cytotoxic, and Th1 cells in patients defined as subtype S1 (Figure 2D); meanwhile a higher abundance of Th2 cells was observed for subtype S2.