Contents
What is a pre-specified analysis?
Pre-specified analysis is subgroup analysis that was planned during the initial experiment design stage, before looking at any data.
What is a pre-specified outcome?
A pre-specified outcome is much less likely to give a false-positive result. This ensures a fair picture of the trial results. However, in reality, pre-specified outcomes are often left unreported, while outcomes that were not pre-specified are reported, without being declared as novel.
What does pre specified mean?
transitive verb. : to specify (something) in advance An analogy might be a car driving on a road.
How do you write a subgroup analysis?
Subgroup analysis is one way of finding out. It’s a type of analysis done by breaking down study samples into subsets of participants based on a shared characteristic. The goal is to explore differences in how people respond to an intervention.
What is an example of an outcome measure?
Outcome measures reflect the impact of the health care service or intervention on the health status of patients. For example: The percentage of patients who died as a result of surgery (surgical mortality rates). The rate of surgical complications or hospital-acquired infections.
What is a pre specified endpoint?
Precise Definitions. Often, prespecified endpoints are defined vaguely or ambiguously. For example, a protocol designed to study the effects of 24 weeks of a new investigational drug on immune function might specify “CD4 count” as an endpoint.
What is the difference between subgroup analysis and stratified analysis?
As above, stratification is different from subgroups in two aspects: (a) in a single study, grouped indicators are generally interventions that must be pre-set, whereas stratified indicators are often considered potential confounding variables; (b) in a meta-analysis, an included study is considered a unit and assigned …
Can a study have multiple primary endpoints?
Multiple endpoints. Multiple endpoints can be chosen and evaluated separately, such that a significant treatment effect against any one of the endpoints may be taken as evidence of efficacy. Multiple primary endpoints become ‘co-primary’ if an effect on multiple outcomes is required to demonstrate proof of efficacy [3] …
Can a study have 2 primary endpoints?
Co-primary endpoints should only be used when there are more than one primary endpoint and declare the study success only if both primary endpoints are statistically significant in favor of the experimental treatment. When co-primary endpoints are used, each primary endpoint is tested at significant level of 0.05.