Table 5.

Hazard ratios for disease flare between patients in remission or activity according to endoscopy, histology, and combined endoscopic plus histological remission vs non-remission.

Hazard ratios	Endoscopy only	RHI ≤3*	NHI ≤1	PHRI = 0
Histology-only		2.75 [1.79–4.22]	2.71 [1.77–4.15]	2.87 [1.86–4.43]
MES = 0	3.00 [1.97–4.59]	3.13 [2.00–4.88]	3.13 [2.00–4.88]	3.05 [1.95–4.78]
UCEIS ≤1	2.96 [1.94–4.53]	2.91 [1.85–4.59]	2.84 [1.81–4.46]	2.91 [1.89–4.59]
PICaSSO ≤3	2.73 [1.80–4.14]	3.04 [1.96–4.71]	3.01 [1.94–4.67]	3.20 [2.05–4.99]

PICaSSO, Paddington International Virtual ChromoendoScopy ScOre; PHRI, PICaSSO Histological Remission Index; MES, Mayo Endoscopic Score; UCEIS, Ulcerative Colitis Endoscopic Index of Severity; NHI, Nancy Histological Index; RHI, Robarts Histological Index; CI, confidence interval.