Esophageal baseline impedance levels allow the identification of esophageal involvement in patients with systemic sclerosis

Distal and proximal BI values in SSc patients were lower than in NERD and HCs, thus we speculated that these findings may be related to the deposition of collagen in the connective tissue. Measurement of BI may be used as an indirect, but simple and accurate marker of esophageal involvement in patients with SSc.