Validation of the VEINES-QOL quality of life instrument in venous leg ulcers: repeatability and validity study embedded in a randomised clinical trial

Table 6 Kappa statistics for 2-week test-retest reliability for each question in VEINES-QOL^a

Question	Kappa	Standard error	Significance
1a	0.56	0.054	P < 0.0001
1b	0.58	0.053	P < 0.0001
1c	0.44	0.053	P < 0.0001
1d	0.67	0.054	P < 0.0001
1e	0.54	0.053	P < 0.0001
1f	0.68	0.054	P < 0.0001
1g	0.59	0.054	P < 0.0001
1h	0.59	0.053	P < 0.0001
1i	0.62	0.054	P < 0.0001
3	0.56	0.052	P < 0.0001
4a	0.58	0.106	P < 0.0001
4b	0.59	0.053	P < 0.0001
4c	0.53	0.053	P < 0.0001
4d	0.46	0.053	P < 0.0001
5a	0.42	0.055	P < 0.0001
5b	0.46	0.055	P < 0.0001
5c	0.55	0.054	P < 0.0001
5d	0.48	0.054	P < 0.0001
6	0.63	0.051	P < 0.0001
7	0.73	0.052	P < 0.0001
8a	0.55	0.052	P < 0.0001
8b	0.64	0.052	P < 0.0001
8c	0.67	0.052	P < 0.0001
8d	0.61	0.052	P < 0.0001
8e	0.71	0.052	P < 0.0001

^aIndividual questions should be repeatable, i.e. answers on different occasions should be related if the questionnaire is valid

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