Furthermore, for most of the shoulder questionnaires, evidence for their validity in various diagnostic groups used in clinical trials is often limited, at best.
For a number of the most well-known questionnaires, evidence for convergent validity is not substantially stronger than that obtained in this study; in fact, in some instances, the relative PA question evaluated in this study, performed better.
Although some researchers have considered medical records as the "gold standard" and the preferred data source over questionnaires, evidence indicates that neither source is completely accurate and that combining sources may result in a more reliable and complete data assessment [ 1- 5].
No additional concepts were noted as missing from the questionnaire, providing evidence to support content validity.
Additionally, Fetherstonhaugh and Lee Ross (1999), using a questionnaire, find evidence that people would be more willing to delay retirement if they received a lump-sum payment rather than an increased annuity.
Excluded were individuals with incomplete information provided by the questionnaire or evidence for alcoholism, drug addiction or other apparent generalized disease.
The NORPEQ is a short self-completed questionnaire with evidence for data quality, reliability and validity.
The questionnaire has evidence for data quality, internal consistency, content validity and construct validity.
The questionnaire has evidence for construct validity following the application of hypotheses based on previous research findings and theory.
