Table 3 Spearman rank correlations coefficients (and p values) between endoscopy, histology, C reactive protein (CRP), and parameters of Crohn's disease (CD) activity at computed tomography scan.

	Rutgeerts' score (n = 143)	Histological score (n = 121)	CD duration (n = 143)	CRP (n = 97)
TI	0.39 (<0.001)	0.38 (<0.001)	−0.04 (0.67)	0.06 (0.53)
TI ratio	0.35 (<0.001)	0.34 (<0.001)	−0.09 (0.29)	0.14 (0.16)
Comb sign	0.39 (<0.001)	0.29 (0.002)	−0.11 (0.018)	0.26 (0.012)
Fat density	0.33 (<0.001)	0.22 (0.016)	−0.02 (0.77)	0.36 (<0.001)

TI, terminal ileal attenuation; TI ratio, the ratio of terminal ileal attenuation to normal distended ileum.