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Forest plots of studies with research design. The top panel represents results from studies for associations of gastroesophageal reflux disease (GERD) symptoms with short-segment Barrett's esophagus (SSBE), showing no association. The bottom panel represents the association with long-segment Barrett's esophagus (LSBE), showing a fivefold increased odds of LSBE with GERD symptoms. Note the scale is logarithmic. I2, inconsistency index; OR, odds ratio.
