In general , estimates of construct validity were lower when vali date d against dissimilar constructs , except for instruments measuring impairments in mental functions .
CONCLUSION There is a trend that validation against a similar construct yields higher correlation coefficients than validation against a dissimilar construct .
PURPOSE This paper focuses on the construct validity of instruments measuring impairments in body structures and function in rheumatic disorders .
The objective is : 1 ) to make an inventory of constructs , based on the domains of the International Classification of Functioning , Disabilities and Health problems ( ICF ) , against which instruments measuring impairments in body structures and function were vali date d ; 2 ) to analyse whether validation against a similar construct result ed in higher correlation coefficients than validation against a dissimilar construct .
Outcome assessment in clinical trials. Evidence for the sensitivity of a health status measure.
Health status measures are conceptually relevant to the assessment of clinical outcome in the rheumatic diseases , but their ability to detect meaningful changes in health has not been clearly demonstrated . This report describes the performance of a self-administered health status question naire in a r and omized , double-blind , 21-week comparison of placebo , oral gold , and injectable gold in rheumatoid arthritis patients . Outcome was assessed by st and ard clinical measures , including joint count , grip strength , and laboratory tests , and by the Arthritis Impact Measurement Scales , a reliable and valid health status measure that assesses physical disability , psychological status , and pain . Data from the clinical and health status measures produced highly similar conclusions : injectable and oral gold are more effective than placebo for rheumatoid arthritis , and injections are slightly more effective than oral gold . The health status measure was thus quite sensitive to clinical ly meaningful drug-induced improvements . These findings provide justification for the further application of health status measures to clinical trials of chronic disease
In general , estimates of construct validity were lower when vali date d against dissimilar constructs , except for instruments measuring impairments in mental functions .
CONCLUSION There is a trend that validation against a similar construct yields higher correlation coefficients than validation against a dissimilar construct .
PURPOSE This paper focuses on the construct validity of instruments measuring impairments in body structures and function in rheumatic disorders .
The objective is : 1 ) to make an inventory of constructs , based on the domains of the International Classification of Functioning , Disabilities and Health problems ( ICF ) , against which instruments measuring impairments in body structures and function were vali date d ; 2 ) to analyse whether validation against a similar construct result ed in higher correlation coefficients than validation against a dissimilar construct .