a conditional power

USAGE SUMMARY

The phrase "a conditional power" is correct and usable in written English.
It can be used in contexts discussing authority or influence that is dependent on certain conditions being met. Example: "The committee has a conditional power to approve the budget, contingent upon the completion of the required audits."

✓ Grammatically correct

Science

Human-verified examples from authoritative sources

Exact Expressions

8 human-written examples

A conditional power approach is used to prevent inflation of the overall trial type I error rate while maintaining adequate statistical power conditional on the statistically significant interaction.

Contemporary Clinical Trials

Due to concerns about the feasibility of such expansion, we did a conditional power calculation and asked the DMC to review the data and make a recommendation on study continuation.

Plosone

Maximum increment is given as >19.9 since this would represent a conditional power in excess of 99.9%.

BMC Medical Research Methodology

Thus a conditional power of considerably less than 50% is permissible from the point of view of type I error rate preservation.

BMC Medical Research Methodology

Wassmer [ 16], for example, compared Fisher's product criterion with an alternative adaptive design proposed by Proschan and Hunsberger [ 17] based on a conditional power function.

BMC Medical Research Methodology

Using results from the interim analysis, a conditional power (CP) computation for futility was also conducted, using guidelines adapted from Lan and Wittes [ 42].

Child and Adolescent Psychiatry and Mental Health

Human-verified similar examples from authoritative sources

Similar Expressions

52 human-written examples

There should be a low conditional power (e.g., ⩽15%), based on the target effect size.

British Journal of Cancer

There was at this point a 4% probability (ie, conditional power) of showing a significant impact of the intervention on QoL global health score, which meant that further trial continuation were not justified.

BMJ Open

Note that conditions (16) can be transferred onto a requirement for fold change conditional power: (18) β d | α < β Th ∩ d > Δ 1 T h α, μ ∩ log 2 v T > L V Th Thus the DFC filter incorporates three different statistical filters: the multiple testing based threshold through parameter α, the t-test conditioned on the values of α through parameter β and the variance filter.

Algorithms for Molecular Biology

Thus one may at the interim use parameter estimates to calculate a normal approximation to the conditional power.

BMC Medical Research Methodology

The last analysis included an additional guideline for evaluating study futility at a cutoff of 40% for conditional power assuming the trend observed in the interim.

Diabetes Care

Expert writing Tips

Best practice

When using "a conditional power", clearly define the conditions under which the power is applicable to avoid ambiguity.

Common error

Avoid using "a conditional power" when the power is, in fact, absolute. Ensure that the limitations are explicitly stated alongside the phrase.

Linguistic Context

The phrase "a conditional power" functions as a noun phrase, typically found in academic and scientific writing. Ludwig AI confirms its usability, often appearing in contexts discussing statistical analyses in clinical trials and research methodologies.

Expression frequency: Uncommon

Frequent in

Science

100%

Less common in

News & Media

0%

Formal & Business

0%

Academia

0%

Ludwig's WRAP-UP

In summary, the phrase "a conditional power" is a grammatically correct noun phrase primarily used within scientific and academic contexts to denote the probability of achieving statistically significant results in ongoing research, especially clinical trials. As confirmed by Ludwig AI, its applications mainly involve interim analyses for assessing study continuation or termination. The phrase's formal register is evident in its prevalence in scientific journals and research reports. Related phrases like "contingent authority" and "conditional authority" offer alternative ways to express power that is dependent on specific conditions, but they often shift the context away from statistical analysis. When employing "a conditional power", clear delineation of the conditions is crucial for maintaining clarity and precision.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

contingent authority

Emphasizes the dependence of authority on specific conditions.

conditional authority

Directly replaces "power" with "authority", highlighting legitimacy.

qualified influence

Uses "influence" instead of "power", suggesting a subtler form of control that is limited.

circumscribed power

Highlights that the power is restricted or limited in scope.

limited jurisdiction

Focuses on the legal or formal boundaries of the power.

dependent capacity

Indicates that the ability to exert power is reliant on certain factors.

relative empowerment

Suggests that power is not absolute but depends on the situation.

situational control

Emphasizes that control is only applicable in specific situations.

restricted mandate

Highlights that the power is derived from a mandate that has limitations.

provisional competence

Suggests that the power is granted temporarily or subject to review.

FAQs

How is "a conditional power" used in research?

In research, "a conditional power" refers to the probability of finding a statistically significant result, given the data observed so far. It's used in interim analyses to decide whether to continue or stop a trial.

What's the difference between "a conditional power" and statistical power?

"A conditional power" is calculated during a study based on interim results, while statistical power is determined at the beginning of a study to estimate the sample size needed.

When might one consider stopping a study based on "a conditional power"?

A study might be stopped for futility if "a conditional power" is very low, indicating a small chance of achieving statistical significance even if the study continues.

What are some alternatives to "a conditional power" in adaptive trial design?

Alternatives in adaptive trial design include predictive power methods and sample size re-estimation procedures, each aimed at optimizing trial outcomes based on accumulating data.