Further stratified analyses showed that in male moderate OSA subjects, FKBP5 SNPs rs1360780, rs3800373 and rs9470080 were positively associated with WK during SPT (p = 0.0267, p = 0.0254 and p = 0.0043, respectively; Figure 2). Here, FKBP5 is linked to obstructive sleep apnea syndrome.