Table 3.

Responsiveness and minimally important change by instrument and 1-week and 6-week follow-up time periods.

Instrument and time period		Receiver operator characteristic AUCa	95% CI	nb	Minimally important change points/ eVASc units (% of baseline score)	95% CI
eRMDQd
	1 week	0.69	0.59 to 0.80	96	1 (19)	0 to 2
	6 weeks	0.67	0.46 to 0.87	40	2 (38)	–1 to 5
eVAS
	1 week	0.69	0.58 to 0.80	93	13 (32)	9 to 17
	6 weeks	0.74	0.53 to 0.95	40	7 (17)	–12 to 26
eNRSe
	1 week	0.73	0.66 to 0.80	185	2 (43)	1 to 3
	6 weeks	0.81	0.69 to 0.92	91	1 (21)	0 to 2

^aAUC: area under the curve.

^bThe number of change scores available (ie, from available pairs of measurements at baseline and follow-up time point) at 1 week and 6 weeks, respectively. 

^ceVAS: electronic visual analog scale.

^deRMDQ: electronic Roland Morris Disability Questionnaire.

^eeNRS: electronic numerical rating scale.