Table 1.

Participant characteristics and ultrasound shear wave elastography summary measures (n=18)

	Median	Interquartile range
Age (years)	16.8	14.7–18.0
Sex
Female (n, %)	10 (55.6%)	–
Male (n, %)	8 (44.4%)	–
Body mass index (kg/m2)	20.6	16.4–22.6
Time between diagnosis and surgery (days)	578	156–1,762
Time between research ultrasound examination and surgery (days)	0.5	0–5.5
Bowel wall shear wave speed (m/s)
0% abdominal strain	2.67 (2.47)	1.76–2.93
10% abdominal strain	2.44 (2.70)	2.03–3.38
20% abdominal strain	2.77 (2.93)	2.16–3.67
Overall right lower quadrant shear wave speed (m/s)
0% abdominal strain	2.46 (2.50)	1.98–2.73
10% abdominal strain	2.49 (2.62)	2.13–2.98
20% abdominal strain	2.58 (2.88)	2.22–3.41

Medians and interquartile ranges are presented, unless otherwise indicated. Mean shear wave speed measurements are also provided in parentheses