Inter- and intraobserver agreement in 24-hour combined multiple intraluminal impedance and pH measurement in children.

Objectives: Assessment of intra- and interobserver agreement in multiple intraluminal impedance (MII) measurement between investigators from different institutions.

Methods: Twenty-four 18- to 24-hour MII tracings were randomly chosen from 4 different institutions (6 per center). Software-aided automatic analysis was performed.