Info

Measurement of Outcome

In developing an outcome measure the concepts of validity, reliability, and responsiveness are vital.

Validity is the extent to which a questionnaire measures what is intended. This usually is assessed by comparing a new measure with an established one (this is known as criterion validity). In the absence of a gold standard, construct validity can be measured; this allows comparison of a new tool with objective or clinical findings.

Reliability is the degree to which measurements on the same individual are similar under different conditions. Test-retest comparisons are the most appropriate method for assessing reliability if the instrument is intended as an evaluative tool. Reliability can also be assessed using internal consistency; this checks the extent to which similar questions give consistent replies.10

Responsiveness considers whether the tool is sensitive to assess measurable change. If meaningful comparisons are to be made then a standardized measure of responsiveness is required. The standardized response mean allows such a comparison (this represents the mean change in score over two points in time divided by the standard deviation of the score differences).11

Was this article helpful?

0 0
Peripheral Neuropathy Natural Treatment Options

Peripheral Neuropathy Natural Treatment Options

This guide will help millions of people understand this condition so that they can take control of their lives and make informed decisions. The ebook covers information on a vast number of different types of neuropathy. In addition, it will be a useful resource for their families, caregivers, and health care providers.

Get My Free Ebook


Post a comment