Evidence map›Paper›PMID 34359078›Full record

ArticleAmerican journal of perinatology2023

The Association between Early Gram-Negative Bacteria in Tracheal Aspirate Cultures and Severe Bronchopulmonary Dysplasia among Extremely Preterm Infants Requiring Prolonged Ventilation.

Yousuke Imanishi, Katsuya Hirata, Masatoshi Nozaki, Narutaka Mochizuki, Shinya Hirano, Kazuko Wada

Open access · hybridAbstract read
In one paragraph

Article in American journal of perinatology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed, 1 pooled it
0.9field-weighted citation impact, top 25% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed, 1 synthesis or guideline pooled it, 7 citations in OpenAlex.

  1. Pooled it
  2. Post-operative tracheitis in the NICU: incidence and risk factors.Journal of perinatology : official journal of the California Perinatal Association · 2026
    Article
  3. Article
  4. Article
  5. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 1 institution in 1 country.

Yousuke ImanishiDepartment of Neonatal Medicine, Osaka Women's and Children's Hospital, Izumi, Osaka, Japan.ORCID 0000-0001-9598-7626
Katsuya HirataDepartment of Neonatal Medicine, Osaka Women's and Children's Hospital, Izumi, Osaka, Japan.ORCID 0000-0003-3148-9892
Masatoshi NozakiDepartment of Neonatal Medicine, Osaka Women's and Children's Hospital, Izumi, Osaka, Japan.
Narutaka MochizukiDepartment of Neonatal Medicine, Osaka Women's and Children's Hospital, Izumi, Osaka, Japan.
Shinya HiranoDepartment of Neonatal Medicine, Osaka Women's and Children's Hospital, Izumi, Osaka, Japan.
Kazuko WadaDepartment of Neonatal Medicine, Osaka Women's and Children's Hospital, Izumi, Osaka, Japan.
Osaka Women's and Children's Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe study aimed to evaluate the association between bronchopulmonary dysplasia (BPD) development at 36 weeks' postmenstrual age (PMA) and Gram-negative bacteria in tracheal aspirate cultures among extremely preterm infants. STUDY

designThis study has a retrospective cohort. Patients were 155 infants aged less than or equal to 26 gestational weeks who were admitted to the neonatal intensive care unit of Osaka Women's and Children's Hospital from 2009 to 2018. Primary outcome was respiratory outcomes expressed as BPD development.Multivariable logistic regression analysis was used to identify neonatal and bacterial factors associated with BPD.

resultsAfter adjusting for gestational age, birth weight, sex, chorioamnionitis, Gram-positive cocci (GPC) and Gram-negative rods (GNRs) in tracheal aspirate cultures within 28 days after birth, GNRs were significantly associated with BPD development (odds ratio [OR]: 3.88, 95% confidence interval [CI]: 1.68-8.94). In contrast, GPCs were not associated with BPD development (OR: 0.47, 95% CI: 0.05-1.61).

conclusionGram-negative bacteria in tracheal cultures within 28 days of birth are associated with BPD development in infants aged less than or equal to 26 gestational weeks. KEY POINTS: · BPD is a factor for morbidity in extremely preterm infants.. · Respiratory infection is an adverse outcome of BPD.. · GNRs in tracheal cultures soon after birth disturb BPD development.. · GPC was not associated with BPD development..

Indexed as

Bronchopulmonary DysplasiaInfant, Extremely PrematureChildFemaleGestational AgeGram-Negative BacteriaHumansInfantInfant, NewbornPregnancyRetrospective Studies

Identifiers

PMID34359078
PMCPMC10457154
OpenAlexW3187797767

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.