For example, a 0 to 10 visual analogue scale on sleep quality, the Epworth Sleepiness Questionnaire, and the SF-36 (although not a sleep specific measure) were identified; however, experts noted that these were not specific to FM, nor were they consistently effective in clinical trials or practical in clinical practice either because of lack of specificity or being cumbersome to use and score.
Associate Prof. Hu advised that more research, especially randomized clinical trials into practical utility, should be conducted.
The large amount of information garnered from incorporating genome-wide technology into clinical trials causes practical challenges for quality assurance, data handling and storage.
Use of an appropriate site selection process is even more pertinent when conducting large scale, practical clinical trials in practice settings.
There can be a lot of reasons for the discrepancy between guidelines or clinical trials evidences and practical application.
Ideally, the quality of prostheses should be evaluated in high-powered randomized clinical trials, but for practical and economic reasons (Black 1996) such trials are seldom performed for long-term comparison of hip implants.
Several ongoing or imminent WNV vaccine clinical trials stress the practical value of an independent confirmation of extrapolations that estimate the percentage of the US population with past WNV infection.
Since 1920, the ketogenic diet has been recognized as an effective tool in the treatment of severe childhood epilepsy, but following the introduction of anticonvulsant drugs, the interest in ketogenic diet treatment waned until the 1990s, with subsequent research and clinical trials demonstrating its practical usefulness.
Thus, the most distinctive features of practical clinical trials are that they select patients from practices, either simulating actual practices or actual clinical practices.
Using intravascular imaging tools, serial follow-up data beyond 2 years after DES implantation are sparse in clinical practice as well as in random clinical trials due to the practical or ethical aspects of clinical practice.
