Compared with that in the healthy OSA group, Dec1 was significantly increased (445.8 ± 38.92 vs. 133.7 ± 12.71, p < 0.001, Figure 1G), and PPARγ was decreased (146.3 ± 13.22 vs. 261.3 ± 16.97, p < 0.001, Figure 1H) in OSA patients with PAH. This evidence concerns the gene PPARG and pulmonary arterial hypertension.