منابع مشابه
Validated questionnaires should not be modified.
T he reformatting and changes that were made to the Asthma Control Questionnaire (ACQ) [1] for the Post-cold Asthma Control and Exacerbation (PAX) study [2] raise some important concerns about modifying validated questionnaires. Just like mechanical and electrical measurement instruments, validated questionnaires are precision measurement instruments. The only difference being that they measure...
متن کاملShould levodopa be used anymore?
Levodopa is the most potent dopaminergic oral drug available in clinical practice. After chronic treatment, many patients with Parkinson's disease develop dyskinesia and motor fluctuations which are difficult to manage. It was hoped that introduction of dopaminergic agonists could diminish these side effects while keeping the same efficacy as levodopa. Prospective clinical data do not support t...
متن کاملWhy item response theory should be used for longitudinal questionnaire data analysis in medical research
BACKGROUND Multi-item questionnaires are important instruments for monitoring health in epidemiological longitudinal studies. Mostly sum-scores are used as a summary measure for these multi-item questionnaires. The objective of this study was to show the negative impact of using sum-score based longitudinal data analysis instead of Item Response Theory (IRT)-based plausible values. METHODS In...
متن کاملComment: How Should Indirect Evidence Be Used?
Indirect evidence is crucial for successful statistical practice. Sometimes, however, it is better used informally. Future efforts should be directed toward understanding better the connection between statistical methods and scientific problems.
متن کاملHow Should Health Data Be Used?
Electronic health records, data sharing, big data, data mining, and secondary use are enabling exciting opportunities for improving health and healthcare while also exacerbating privacy concerns. Two court cases about selling prescription data, the Sorrell case in the U.S. and the Source case in the U.K., raise questions of what constitutes "privacy" and "public interest"; they present an oppor...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Deutsches Aerzteblatt Online
سال: 2015
ISSN: 1866-0452
DOI: 10.3238/arztebl.2015.0563a