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Table 3 Summary of previous meta-analyses and the limitations

From: The association between angiotensin II type 1 receptor A1166C gene polymorphism and the risk of essential hypertension: a meta-analysis

Author and year Case setting Searching strategy NS Limitations
Liu et al. 2015 [65] Hypertension PubMed, EMBASE, ISI Web of Science, Wanfang, and CNKI 56 5 studies had deviation from HWE
25 full texts were not found
Data discrepancy was found
Wang et al. 2010 [64] EHT Chinese Biomedicine Database, CNKI, PubMed, and Medline 30 2 studies had deviation from HWE
21 full texts were not found
Yang et al. 2017 [66] Hypertension PubMed and Web of Knowledge 46 3 studies had deviation from HWE
3 full texts were not found
  1. EHT essential hypertension, CNKI China National Knowledge Infrastructure, NS number of studies, HWE Hardy-Weinberg equilibrium