TABLE 1.

Definitions of transmural healing (TH).

References and number of patients	Definition of transmural healing based on IUS
Castiglione et al. (18), (n = 133)	BWT ≤ 3 mm
Ripollés et al. (22), (n = 51)	BWT ≤ 3 mm
Civitelli et al. (27), (n = 32)	BWT ≤ 3 mm and other IUS features
Castiglione et al. (19), (n = 40)	BWT ≤ 3 mm plus absence of hypervascularisation signs
Orlando et al. (29), (n = 30)	BWT ≤ 3 mm
Paredes et al. (23), (n = 36)	BWT ≤ 3 and 0–1 doppler scale
Castiglione et al. (21), (n = 218)	BWT ≤ 3 mm
Zorzi et al. (28), (n = 80)	BWT ≤ 3 mm
Ma et al. (26), (n = 77)	BWT ≤ 3 mm and normalization of stratification, no hypervascularisation, resolution of mesenteric inflammatory fat, and no complications (IUS)
Calabrese et al. (24), (n = 188)	BWT ≤ 3 mm ileum/4 mm for colon, normal Limberg score and no complications
Helwig et al. (25), (n = 137)	BWT and Color-Doppler normalization, no loss of stratification and no fibro fatty proliferation

BWT, bowel wall thickness; IUS, intestinal ultrasound.