Psychometric evaluation of the Urgency NRS as a new patient-reported outcome measure for patients with ulcerative colitis

Journal of Patient-Reported Outcomes

Table 4 Convergent and discriminant validity of the Urgency NRS at baseline and week 12

	Baseline			Week 12
	n	Spearman correlation coefficient ^a	95% CI	n	Spearman correlation coefficient ^a	95% CI
IBDQ
Bowel symptoms	1136	− 0.42	(− 0.47, − 0.37)	1079	− 0.60	(− 0.64, − 0.56)
Systemic symptoms	1136	− 0.37	(− 0.42, − 0.32)	1079	− 0.50	(− 0.55, − 0.46)
Emotional functioning	1136	− 0.31	(− 0.37, − 0.26)	1079	− 0.46	(− 0.51, − 0.42)
Social functioning	1136	− 0.38	(− 0.42, − 0.32)	1079	− 0.50	(− 0.54, − 0.45)
Total score	1136	− 0.41	(− 0.45, − 0.36)	1079	− 0.57	(− 0.61, − 0.53)
PGRS	1148	0.56	(0.52, 0.60)	1086	0.67	(0.63, 0.70)
PGRC^b	–	–	–	1079	0.52	(0.47, 0.56)
MMS
Stool frequency	1148	0.30	(0.25, 0.35)	1087	0.49	(0.44, 0.53)
Rectal bleeding	1 148	0.28	(0.22, 0.33)	1087	0.39	(0.33, 0.44)
Endoscopic subscore	1147	0.07	(0.01, 0.13)	1079	0.33	(0.27, 0.38)
Total score	1147	0.36	(0.31, 0.41)	1079	0.52	(0.47, 0.56)
Geboes score	1,128	0.02	(− 0.04, 0.08)	1064	0.28	(0.23, 0.34)

CI confidence interval, IBDQ Inflammatory Bowel Disease Questionnaire, MMS modified Mayo score, NRS Numeric Rating Scale, PGRC Patient Global Rating of Change, PGRS Patient Global Rating of Severity
^a > 0.5 = strong, 0.3 to 0.5 = moderate, and < 0.3 = weak
^bNot assessed at baseline