Development and validation of a disease-specific quality of life questionnaire for patients with peripheral artery disease (QOLPAD)

Journal of Patient-Reported Outcomes

Table 5 Correlation of the QOLPAD with convergent criteria at follow-up and distribution of convergent criteria

	r	p	n	Mean	Median	Minimum	Maximum
EQ-5D-3L	− 0.81	< 0.001	52	0.78*	0.88	0.18	1.0
EQ VAS	− 0.79	< 0.001	52	66.7*	70.0	30.0	100.0
VascuQoL	− 0.87	< 0.001	54	5.1	5.1	1.8	7.0
Stage of PAD	0.67	< 0.001	49	3.3*	3.0	1	5
Global rating of impairment	0.71	< 0.001	53	1.7*	2.0	0	4

Follow-up: second measurement, approximately 3 months after the start of treatment, r: Spearman’s correlation coefficient, p: level of significance, n: number of patients; EQ VAS: EuroQol visual analogue scale, VascuQoL: Vascular Quality of Life Questionnaire, PAD: peripheral artery disease
The stage of PAD was classified according to Fontaine, with 1–5 denoting stage I–IV, respectively [3]
*Variables not normally distributed