Objective: This unprecedented systematic review aims to unearth the rate of CG among Chinese people.
Methods: Data sources were from PsycINFO, ProQuest Databases, Web of Science, PsycARTICLES, China National Knowledge Infrastructure (CNKI), WanFang, Taiwan Periodical Literature System (TPLS), HKInChiP from the inception to June 2019. The eligibility criteria for inclusion were (a) including or useful to calculate the prevalence of CG in Chinese settings, (b) published in journals, (c) containing information on sample size, (d) full texts either written in English or in Chinese are available. Thirteen studies were engaged in meta-analytic evaluation after the systematic review. They were appraised by the risk of bias (RoB) for publication-quality and synthesized through meta-analysis for identifying the prevalence of CG among Chinese people.
Results: Meta-analysis revealed a pooled estimate of CG of 22.0% (95% CI: 0.111-0.391). The studies identified in this review were of methodological heterogeneousness and focused on the population at high risk of CG. They were a moderate or high risk of bias.
Conclusion: Results warrant the need to conduct a population-based and quality study to investigate the prevalence of CG in Chinese people. Many suggestions on treatment for Chines people with CG were provided.