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Relationships between esophageal baseline impedance and dysphagia and heartburn. (A) Negative association of distal esophageal baseline impedance (BI; ohm) at 3 cm, 5 cm, 7 cm, and 9 cm above lower esophageal sphincter (LES) and dysphagia score. Proximal esophageal baseline impedance levels at 15 cm and 17 cm above LES were not significantly related with dysphagia score. (B) Esophageal BI was not significantly correlated with heartburn score.
