Luminex assay showed that there was no significant difference in serum IL-33 levels between the hypertension group and the control group (hypertension: median 108.34 ng/ml, IQR: 94.8–119.84; control: median 109.65 ng/ml, IQR: 98.82–120.69; Fig. 2a). Here, IL33 is linked to hypertensive disorder.