Additionally, to identify another set of key genes related to OSA, we selected 10 hub genes (IL-6, FOS, FOSB, JUN, DUSP1, EGR1, PTGS2, ATF3, and ZFP36) from the PPI network of DEGs between the two mitochondrial dysfunction-related clusters. Here, PTGS2 is linked to obstructive sleep apnea syndrome.