CRY1 and obstructive sleep apnea syndrome: We found positive correlation with moderate power between Ngb and Cry1 in OSA patients with PA (Spearman’s rho = 0.455, p = 0.038, n = 16), but not in the non PA group (Spearman r = 0.036, p = 0.434, n = 24) (Fig 4).