Exact(1)
We determined about a tenth of studies may have misclassified their phenotypic outcomes and three-fourths of studies may have misclassified their environmental factors.
Similar(59)
About a third of studies that compared technology-assisted education with traditional teaching methods found no difference in student performance.
Less than a third of studies on cyclosporine reported the standard criteria needed to determine bioequivalence.
We identified conceptual overlap in a third of studies and only half of studies had uni-dimensional attributes.
Only a third of studies included in this paper used an RCT or other robust study design, and many of these had a high risk of bias.
Moreover, only a third of studies were from medical/epidemiological/healthcare journals and with no distinction between studies of patients or of staff and subgroup analyses were absent.
Furthermore, not all studies used the same algorithm to calculate index-based scores with a third of studies also failing to report which scoring system was used.
A third of studies (n=30) reported data collected as part of an incident reporting scheme based within the hospital; see online appendix table 1 for details.
More than a third of studies did not observe a cardiovascular serious adverse event; among these trials, five of eight included participants with past cardiovascular disease.
The distribution of principal confounders, such as synchronous or metachronous metastases and curative intent of surgery were not reported by almost a third of studies.
Typically, information about measures included some reliability data although a third of studies failed to provide information about the validity of the scale.
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