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KMID : 1044620220550050424
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Journal of Preventive Medicine and Public Health
2022 Volume.55 No. 5 p.424 ~ p.427
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Statin Intake and Gastric Cancer Risk: An Updated Subgroup Meta-analysis Considering Immortal Time Bias
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Bae Jong-Myon
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Abstract
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A retrospective record-linkage study (RLS) based on medical records containing drug prescription histories involves immortal time bias (ITB). Thus, it is necessary to control for this bias in the research planning and analysis stages. Furthermore, a summary of a meta-analysis including RLSs that did not control for ITB showed that specific drugs had a preventive effect on the occurrence of the disease. Previous meta-analytic results of three systematic reviews evaluating the association between statin intake and gastric cancer risk showed that the summary hazard ratio (sHR) of the RLSs was lower than 1 and was statistically significant. We should consider the possibility of ITB in the sHR of RLSs and interpret the results carefully.
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KEYWORD
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Data linkage, Bias, Hydroxymethylglutaryl-CoA reductase inhibitors, Stomach neoplasms, Meta-analysis
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