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Record W1975414964 · doi:10.1513/pats.200611-176ht

Power Considerations for Studies of Lung Function in Cystic Fibrosis

2007· review· en· W1975414964 on OpenAlexaff
Mary Corey

Bibliographic record

VenueProceedings of the American Thoracic Society · 2007
Typereview
Languageen
FieldMedicine
TopicCystic Fibrosis Research Advances
Canadian institutionsInstitute for Clinical Evaluative SciencesSickKids FoundationHospital for Sick Children
Fundersnot available
KeywordsMedicineObservational studyCystic fibrosisLung functionLungLung diseasePulmonary function testingClinical trialIntensive care medicineDiseaseSample size determinationInternal medicineStatistics

Abstract

fetched live from OpenAlex

Observational studies and clinical trials in cystic fibrosis (CF) have largely been concerned with improving long-term survival. Lung function tests, in particular FEV(1), have proven to be reliable and objective measures for monitoring the course of CF lung disease. Over several decades, the variability and average rates of FEV(1) decline have been remarkably stable. In the past decade, specific treatments and management of CF have resulted in a more gradual rate of decline, so that large numbers of patients are needed to demonstrate a significant subgroup or treatment difference. New measures are needed that detect changes before lung function decline, and that reflect more subtle changes over time. As new measurement tools are developed, FEV(1) provides a model to show how age, sex, duration, and frequency of measurement are related to variability, sample size, and power in cross-sectional or longitudinal studies. Chest radiographs are a standard tool for clinical assessment of an individual patient. However, their use in clinical trials has been limited by the lack of an objective way of measuring the elements that characterize the disease process. The CT scan offers more specific measurements relating directly to the process of lung disease in CF. Computerized algorithms can provide objective scores, but it will be an ongoing challenge to confirm the validity of candidate measures and their relationship to CF lung disease.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.004
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Not applicable · Consensus signal: none
GenreCandidate signal: Review · Consensus signal: Review
Teacher disagreement score0.763
Threshold uncertainty score0.868

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.004
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0020.001
Bibliometrics0.0000.001
Science and technology studies0.0000.001
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.098
GPT teacher head0.456
Teacher spread0.357 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designNot applicable
Domainnot available
GenreReview

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations22
Published2007
Admission routes1
Has abstractyes

Explore more

Same venueProceedings of the American Thoracic SocietySame topicCystic Fibrosis Research AdvancesFrench-language works237,207