Additionally, compared with that in NPC women with an RBP4 level <40.1 mg/L, the incidence of SGA increased from 7.8% to 35.7% in PE patients with high RBP4 levels, representing an absolute risk increase of 27.9% and a relative risk increase of 7.1-fold. This evidence concerns the gene RBP4 and nasopharyngeal carcinoma.