Table 2.

C-reactive protein values and correlating endoscopic scores

Ref.	Disease	Endoscopic tool	Endoscopic score (descriptor)	Calculation	CRP scores
Falvey et al[71]	CD	SES-CD	0-2 (inactive)	Mean (95%CI)	2.9 mg/L (1.8-4.6)
			3-6 (mild)		4.0 mg/L (2.6-6.1)
			7-15 (moderate)		5.1 mg/L (3.0-9.0)
			> 16 (severe)		22 mg/L (12.5-38.9)
Sipponen et al[88]	CD	CDEIS	< 3 (inactive)	Median (95%CI)	0.0 mg/L (0-21)
			3-9 (mild)		0.0 mg/L (0-26)
			9-12 (moderate)		8.5 mg/L (0-85)
			≥ 12 (severe)		16.5 mg/L (0-211)
Schoepfer et al[77]	CD	SES-CD	0-3 (inactive)	Mean (range)	12 mg/L (3-94)
			4-10 (mild)		8 mg/L (3-53)
			11-19 (moderate)		23 mg/L (3-172)
			≥ 20 (high)		40 mg/L (5-121)

CDEIS: Crohn’s disease endoscopic index of severity; SES-CD: Simple endoscopic score for Crohn’s disease.