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A systematic survey on reporting and methods for handling missing participant data for continuous outcomes in randomized controlled trials

2017· review· en· W2620826610 on OpenAlexaff
Iván D. Flórez, Luis Enrique Colunga‐Lozano, Fazila Aloweni, Sean A. Kennedy, Aihua Li, Samantha Craigie, Shiyuan Zhang, Arnav Agarwal, Luciane Cruz Lopes, Tahira Devji, Wojtek Wiercioch, John J. Riva, Mengxiao Wang, Xuejing Jin, Yutong Fei, Paul Alexander, Gian Paolo Morgano, Yuan Zhang, Alonso Carrasco‐Labra, Lara A Kahale, Elie A. Akl, Holger J. Schünemann, Lehana Thabane, Gordon Guyatt

Bibliographic record

VenueJournal of Clinical Epidemiology · 2017
Typereview
Languageen
FieldMathematics
TopicStatistical Methods and Bayesian Inference
Canadian institutionsUniversity of TorontoMcMaster UniversityImpact
Fundersnot available
KeywordsMissing dataRandomized controlled trialMedicineInterquartile rangeImputation (statistics)MEDLINEClinical trialStatisticsSurgeryInternal medicineMathematics

Abstract

fetched live from OpenAlex
No abstract in any covered source. Its absence is recorded, not treated as a negative.

No abstract. This is not a gap in this database; OpenAlex has none either. 23.3% of the frame is in this state, and the screen finds HALF as much metaresearch here, so the absence is a measured bias rather than a missing field.

How this classification was reachedexpand

Direct model labels (unvalidated)

Per-model category and study-design labels from the labeling rounds. They are machine output, unvalidated, and the disagreement between models ships as data. No study design here is MEDLINE-validated yet.

Model armCategoriesStudy designConfidence
gemmaMetaresearch
Domain: Methods · Genre: Review
About the Canadian research system: no · About a Canadian topic: no
Systematic reviewlow
gptMetaresearchMeta-epidemiology (broad)
Domain: Methods · Genre: Review
About the Canadian research system: no · About a Canadian topic: no
Systematic reviewhigh
models splitAgreement compares identical category sets and study designs across arms.

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.407
metaresearch head score (Gemma)0.744
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesMetaresearch
Consensus categoriesMetaresearch
DomainCandidate signal: Reporting · Consensus signal: none
Study designCandidate signal: Systematic review · Consensus signal: Systematic review
GenreCandidate signal: Review · Consensus signal: Review
Teacher disagreement score0.593
Threshold uncertainty score0.731

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.4070.744
Meta-epidemiology (narrow)0.0030.005
Meta-epidemiology (broad)0.0160.018
Bibliometrics0.0150.015
Science and technology studies0.0020.005
Scholarly communication0.0080.010
Open science0.0060.006
Research integrity0.0080.014
Insufficient payload (model declined to judge)0.0050.001

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 head0.941
GPT teacher head0.764
Teacher spread0.177 · 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

Labeled directly by 2 models reading the full record.

MetaresearchMeta-epidemiology (broad)

The models disagree on parts of this classification; every voice is preserved in the section at the end of the page.

Study designSystematic review
DomainMethods
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

Citations34
Published2017
Admission routes1
Has abstractno

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