and gene polymorphisms and the susceptibility of essential hypertension: A meta‑analysis.

and may be candidate genes for essential hypertension (EH). However, the genetic association between the and gene polymorphisms and EH risk remains contradictory. To determine a more precise association of the and gene polymorphisms and EH, the present study performed a meta-analysis. Eligible studies up to Jan 2021 were retrieved from multiple databases including PubMed, Embase, Web of Science and China National Knowledge Infrastructure. The pooled odds ratio (OR) and 95% confidence interval (CI) were used to evaluate the genetic associations between the allele, dominant and recessive models of Nsil, RsaI and G972R polymorphisms and EH susceptibility. A total of 10 case-control studies encompassing 2,782 subjects including 1,289 cases and 1,493 controls were evaluated for the present meta-analysis. Neither of the allele, dominant and recessive models of Nsil and G972R polymorphisms was associated with EH risk (P>0.05). While the allele [P=0.0008, OR=0.58, (95% CI)=(0.42, 0.80)], dominant [P=0.02, OR=0.59, (95% CI)=(0.38, 0.92)] and recessive models [P=0.003, OR=0.38, (95% CI)=(0.20, 0.72)] of Rsal polymorphism were associated with decreased risk of EH. Subgroup analysis according to ethnicity showed that the significant associations between the allele, dominant and recessive models of Rsal polymorphism and EH risk were observed in Caucasian populations, but not in Asian populations (P>0.05). In conclusion, the Rsal polymorphism is probably a protective factor for EH. To identify the result, additional case-control designed research with larger numbers of subjects are required.