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In the paper entitled: “Socioeconomic position and incidence of gastric cancer: a systematic review and meta-analysis publish in August 2013 issue of JECH1” some points might be of concern to your readers:
In the Data synthesis, authors have referred to the Relative Indexes of Inequality (RIIs) as the independent variable, while it seems that RIIs serve as measures of association (like relative risks) to show the strength of relationship between the independent variables and the outcome.
In the …
Competing interests None.
Provenance and peer review Not commissioned; externally peer reviewed.