Intra‐rater and inter‐rater reliability of ultrasonographic intestinal wall thickness measurements in healthy horses

Ultrasonographic measurements of intestinal wall thickness show limited consistency but low absolute variation. Differences of less than 1 mm fall within expected repeated measurement variability. This study supports the use of repeated ultrasonographic intestinal wall thickness measurements in clinical practice and provides a practical cut-off value of 1 mm to differentiate expected variability within and between observers from true changes in intestinal wall thickness.