BMC Cardiovascular Disorders

Table 4 Composite scores^a using three different scaling methods

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

	Baseline		Two weeks		Four months
Scale	Mean	SD	Mean	SD	Mean	SD
VEINES-QOL
Original	50.0	10.0	50.0	10.0	50.0	10.0
External standard^b	50.0	10.0	49.2	10.2	54.5	11.1
Intrinsic	53.6	22.1	51.8	22.7	62.9	24.8
Symptoms
Original	50.0	10.0	50.0	10.0	50.0	10.0
External standard^b	50.0	10.0	50.3	10.3	54.8	10.6
Intrinsic	58.4	23.0	59.0	23.8	69.2	24.3

^adifferent methods of forming the score may produce different numerical values
^bAt baseline the external standard score is identicalto the baselinescore, because the baseline dataset forms the standard reference set

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ISSN: 1471-2261

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