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Objectives Patient-reported outcomes (PROs) are essential when evaluating many new treatments in health care; yet, current measures have been limited by a lack of precision, standardization, and comparability of scores across studies and diseases. The Patient-Reported Outcomes Measurement...
Objectives To evaluate the Patient-Reported Outcomes Measurement Information System (PROMIS), which collected data from an Internet polling panel, and to compare PROMIS with national norms.
Objectives A survey of randomized controlled trials found that almost a quarter of trials had more than 10% of responses missing for the primary outcome. There are a number of ways in which data could be missing: the subject is unable to provide it, or they withdraw, or become lost to follow-up....
Objective A recently published instrument (PRECIS) was designed to assist investigative teams in understanding the various design decisions that need to be made regarding pragmatic vs. explanatory trials. Our team used this instrument during an investigators' meeting to organize our discussion...
Objectives It is difficult to compare the reliability of triage systems with the kappa statistic. In this article, a method for comparing triage systems was developed and applied to previously conducted triage reliability studies.
Objective To investigate responsiveness and interpretability of the Quebec Back Pain Disability Scale.
Objective Many different types of bias have been described. Some biases may tend to coexist or be associated with specific research settings, fields, and types of studies. We aimed to map systematically the terminology of bias across biomedical research.
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