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Record W2222373538 · doi:10.32385/rpmgf.v23i4.10382

The relationship of H. Pylori infection and gastric cancer

2007· article· en· W2222373538 on OpenAlexaff
Roger E. Thomas, Jaime Correia de Sousa

Bibliographic record

VenueDOAJ (DOAJ: Directory of Open Access Journals) · 2007
Typearticle
Languageen
FieldMedicine
TopicHelicobacter pylori-related gastroenterology studies
Canadian institutionsUniversity of Calgary
Fundersnot available
KeywordsMedicineHelicobacter pyloriCancerCochrane LibraryInternal medicineGastroenterologyOdds ratioRandomized controlled trialMeta-analysisOncology

Abstract

fetched live from OpenAlex

O objectivo da presente revisão é avaliar se existe uma relação entre a infecção por Helicobacter pylori e cancro gástrico. Pesquisámos o Cochrane Central Register of Controlled Trials, o Cochrane Database of Systematic Reviews e o NHS Database of Abstracts of Reviews of Effectiveness; MEDLINE; EMBASE; Silver-Platter, Biological Abstracts and Science Citation Index-Expanded. Usámos os termos de pesquisa Helicobacter pylori e (gastric or stomach) and (cancer$ or neoplasm$) e (systematic review$ or meta-anal$), e pesquisámos artigos de todas as línguas limitando a pesquisa a humanos. Avaliação do Nível de Evidência: usámos o sistema de classificação da revista American Family Physician: Nível A (ensaios clínicos aleatorizados/meta-análises). Nível B (outras fontes de evidência). Nível C (consensos/opinião de peritos). O H. Pylori aumenta a OR para cancro de estômago em vários estudos. O H. Pylori está associado ao desenvolvimento de ambos os tipos de adenocarcinoma gástrico. Em média, apenas três por cento dos portadores de H. Pylori desenvolvem carcinoma gástrico. O risco de cancro de estômago está igualmente aumentado se o indivíduo tem polimorfismos que resultam numa expressão maior do que os níveis médios da citocina IL-1ß. Não existe evidência que os suplementos nutricionais previnam o cancro gástrico. O cancro gástrico é precedido por um longo período de latência. A infecção por H. pylori é uma causa primária da cascata pré-cancerosa da gastrite à displasia e a erradicação do H. pylori por terapêutica antibiótica resulta num atraso moderado do processo canceroso. A investigação apresentada revista até hoje sugere que a melhor estratégia é, primeiro, incidir nos indivíduos de alto risco com factores de risco conhecidos de exposição ao H. pylori e rastreá-los endoscopicamente para o desenvolvimento de cancros gástricos iniciais que podem ser ressecados endoscopicamente; seguidamente, rastrear indivíduos mais novos (< 45 anos) em risco para H. pylori que não foram expostos ao H. pylori por um período tão longo e tratá-los.

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 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)0.007
metaresearch head score (Gemma)0.028
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.009
Threshold uncertainty score0.039

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0070.028
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0060.004
Bibliometrics0.0050.005
Science and technology studies0.0000.001
Scholarly communication0.0030.002
Open science0.0020.001
Research integrity0.0030.002
Insufficient payload (model declined to judge)0.0090.001

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 head0.224
GPT teacher head0.533
Teacher spread0.309 · 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 source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

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

Citations0
Published2007
Admission routes1
Has abstractyes

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