Evidence map›Paper›PMID 24742723›Full record

ArticleEnvironmental research2014

Prenatal exposure to p,p'-DDE and p,p'-DDT in relation to lower respiratory tract infections in boys from a highly exposed area of Mexico.

Lea A Cupul-Uicab, Efraín A Terrazas-Medina, Mauricio Hernández-Ávila, Matthew P Longnecker

Open access · greenAbstract read
In one paragraph

Article in Environmental research, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
0.2field-weighted citation impact, top 40% 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

8 citing papers in PubMed, 1 synthesis or guideline pooled it, 10 citations in OpenAlex.

  1. Respiratory and Allergic Effects in Children Exposed to Pesticides-A Systematic Review.International journal of environmental research and public health · 2020
    Pooled it
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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

4 authors at 2 institutions in 2 countries.

Lea A Cupul-UicabCenter for Population Health Research, National Institute of Public Health, Cuernavaca 62100, Morelos, Mexico; Epidemiology Branch, National Institute of Environmental Health Sciences, NIH/DHHS/USA, Research Triangle Park, NC 27709, USA. Electronic address: lea.cupul@insp.mx.
Efraín A Terrazas-MedinaCenter for Population Health Research, National Institute of Public Health, Cuernavaca 62100, Morelos, Mexico.
Mauricio Hernández-ÁvilaCenter for Population Health Research, National Institute of Public Health, Cuernavaca 62100, Morelos, Mexico.
Matthew P LongneckerEpidemiology Branch, National Institute of Environmental Health Sciences, NIH/DHHS/USA, Research Triangle Park, NC 27709, USA.
Instituto Nacional de Salud Pública · MXNational Institute of Environmental Health Sciences · US

Funding

Study of Health Effects of DDT in MexicoZIAES044009 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 2009 to 2017
$312k
Study of Health Effects of DDT in MexicoZ01ES044009 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI LONGNECKER, MATTHEW P · 2001 to 2008
$95k
Intramural NIH HHS Z01 ES044009Intramural NIH HHS Z99 ES999999Intramural NIH HHS ZIA ES044009NIEHS NIH HHS N01-ES-15467
6 · The paper itself

Abstract

backgroundPrenatal exposure to 1,1-dichloro-2,2-bis(p-chlorophenyl)ethylene (p,p'-DDE), the major breakdown product of DDT, has been associated with recurrent lower respiratory tract infections (LRTIs) in infants. However, epidemiological investigations are limited.

objectiveTo assess the association of prenatal exposure to p,p'-DDE and p,p'-DDT with the occurrence of LRTI in boys from Chiapas, a highly exposed area of Mexico.

methodsWe analyzed data from 747 singleton boys whose prenatal exposure to p,p'-DDE and p,p'-DDT was determined in maternal serum drawn at delivery (2002-2003). LRTI (i.e., pneumonia, bronchiolitis, and other illness of the bronchi) experienced by the children were reported by their mothers during in-person interviews. The median age of the children when they were last seen was 21.4 months (quartiles 19.1 and 25.3 months).

resultsMedian exposure to p,p'-DDE in this population was higher (2.7 µg/g lipid) than recent U.S. levels (0.20 µg/g). There were 0.19 episodes of LRTI per child-year. After adjusting for potential confounders, children in the highest category of p,p'-DDE (>9.00 µg/g) exposure compared to those in the lowest (≤ 3.00 µg/g) had an adjusted incidence rate ratio (aIRR) of LRTI of 0.77 (95% confidence interval [CI], 0.41-1.46). The corresponding aIRR for p,p'-DDT (≥ 2.00 µg/g compared to ≤ 0.25 µg/g) was 0.65 (95% CI: 0.30-1.39).

conclusionAn association of prenatal exposure to p,p'-DDE and p,p'-DDT with LRTI during childhood was not supported in this population with relatively high levels of exposure.

Indexed as

Prenatal Exposure Delayed EffectsAdolescentAdultBronchitisChild, PreschoolDDTDichlorodiphenyl DichloroethyleneFemaleFollow-Up StudiesHumansInfantMaleMexicoPneumoniaPregnancyYoung AdultDDTDichlorodiphenyl DichloroethyleneBoysLower respiratory tract infectionsp,p′-DDEp,p′-DDTPrenatal exposure

Identifiers

PMID24742723
PMCPMC4797060
OpenAlexW2034720833

What OpenQuestion holds

Textmetadata
LicenceTDM
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.