meta分析文献筛选流程图(英文版本)

Records identified through database searching(n=1045)PubMed (n=180)Embase (n=220)Cochrane (n=39)Web of science (n=481)CNKI (n=16)Wanfang (n=47)VIP (n=23)CBM (n=39)

Records removed before screening:Duplicate records removed(n=434)

Reports assessed for eligibility (n=52)

Screening

Full-text articles evaluated for eligibility (n=85)-The content of the study did not meet the inclusion criteria (n=16)-Lack of access to valid data (n=6)-Unable to access full text (n=9)

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Records after the removal of duplicates (n=611)

Full-text articles evaluated for eligibility (n=85)

Records excluded after reading the title and abstract (n=526)

Studies included in quantitativesythesis(Meta-analysis)(n=52)

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