Efficacy of green tea extract on weight control in metabolic syndrome: a meta-analysis / 中华老年医学杂志

ABSTRACT

Objective To systematically evaluate the efficacy of green tea extract (GTE) on weight control in metabolic syndrome (MS).Methods Related randomized controlled trials (RCTs) about GTE and MS were searched and identified from PubMed,Scopus,PsycINFO,EMBase,the VIP database,CNKI,and Wanfang Resource Database.Valid data were extracted according to strict inclusion and exclusion criteria.The RevMan 5.2.2 software was used to carry out the meta-analysis.Results A total of 10 trials involving 626 patients were ultimately included.Meta analysis showed that1) compared with the placebo group,body weight (SMD=0.19,95％ CI-0.34 to-0.03,Z 2.34,P=0.02) and waist circumference (SMD=-0.19,95％CI-0.36 to-0.02,Z=2.15,P=0.03) were significantly decreased in the GTE group;2) no significant difference was found between the two groups in BMI (SMD=0.14,95％ CI-0.31 to 0.03,Z=1.63,P=0.10),hip circumference (SMD=0.15,95％CI-0.11 to 0.42,Z=1.12,P=0.26) or waist-to-hip ratio (WMD=-0.02,95％CI-0.05 to 0.01,Z=1.32,P=0.19).Conclusions Green tea extract can significantly reduce body weight and waist circumference in patients with metabolic syndrome.