Table 3. Comparison Among Patient-Reported Outcome Measures for HHT-Associated Epistaxis.

Epistaxis PROM	Content validity	Internal consistency	Validity		Test-retest reliability	Responsiveness	MCID
			Concurrent	Discriminant
NOSE HHT	+a	+	+	+	+	+	+
ESS	+	0	+	0	0	0	−
EQQol	+	+	+	0	+	+	0

Abbreviations: ESS, Epistaxis Severity Score; EQQol, Epistaxis Questionnaire Quality of Life; HHT, hereditary hemorrhagic telangiectasia; MCID, minimal clinically important difference; NOSE, Nasal Outcome Score for Epistaxis; PROM, patient-reported outcome measure.

^a+ indicates completed adequately; − indicates completed but inadequate; 0 indicates not completed.