Evidence map›Paper›PMID 18629318›Full record

ArticleEnvironmental health perspectives2008

Association of lead exposure with survival in amyotrophic lateral sclerosis.

Freya Kamel, David M Umbach, Lillian Stallone, Marie Richards, Howard Hu, Dale P Sandler

Open access · diamondAbstract read
In one paragraph

Article in Environmental health perspectives, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed, 1 pooled it
2.0field-weighted citation impact, top 14% 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

21 citing papers in PubMed, 1 synthesis or guideline pooled it, 46 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Occupational lead exposure and survival with amyotrophic lateral sclerosis.Amyotrophic lateral sclerosis & frontotemporal degeneration · 2023
    Article
  6. Review
  7. Validity and reliability of the Turkish version of "the Dyspnea-ALS-Scale (DALS-15)".Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
    Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Assessment of ALS mortality in a cohort of formaldehyde-exposed garment workers.Amyotrophic lateral sclerosis & frontotemporal degeneration · 2013
    Article
  13. Review
  14. Article
  15. The protean toxicities of lead: new chapters in a familiar story.International journal of environmental research and public health · 2011
    Review
  16. Review
  17. Article
  18. Article
  19. Article
  20. 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 4 institutions in 1 country.

Freya KamelEpidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA. kamel@niehs.nih.gov
David M Umbach
Lillian Stallone
Marie Richards
Howard Hu
Dale P Sandler
National Institutes of Health · USSocial and Scientific Systems (United States) · USUniversity of Michigan · USWestat (United States) · US

Funding

Statistical Methods In Human Development/clinical StudiesZIAES049004 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI UMBACH, DAVID M · 2009 to 2025
$1.8M
Environmental Exposures And Risk For Cancer and Chronic Diseases In AdultsZIAES049028 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 2009 to 2024
$1.6M
Lead And Other Neurotoxins As Risk Factors For Amyotrophic Lateral SclerosisZIAES049005 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 2009 to 2017
$718k
Environmental Exposures And Risk For Cancer and Chronic Diseases In AdultsZ01ES049028 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 1997 to 2008
$284k
LEAD AND OTHER NEUROTOXINS AS RISK FACTORS FOR AMYOTROPHIC LATERAL SCLEROSISZ01ES049005 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI SANDLER, DALE P · 1992 to 2008
$158k
Statistical Methods In Human Development/Clinical StudyZ01ES049004 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI UMBACH, DAVID M · 1992 to 2008
$149k
Intramural NIH HHS
6 · The paper itself

Abstract

backgroundReasons for the variability in survival among ALS cases are unknown but may include exposure to environmental neurotoxicants.

objectivesWe aimed to determine whether lead exposure, assessed by measuring blood and bone lead levels, is associated with survival in amyotrophic lateral sclerosis (ALS).

methodsWe evaluated the relationship of lead exposure to ALS survival in 110 cases from a case-control study conducted in New England in 1993-1996 that included measurements of blood and bone lead. We retrieved information on date and cause of death through 31 December 2003 from the National Death Index Plus and the Social Security Administration Death Index. We evaluated the relationship of survival to lead exposure using Cox proportional hazard analysis, with adjustment for age, sex, and smoking.

resultsWe found mortality data for 100 of 110 cases; 93 of 100 death certificates mentioned ALS. Median survival from diagnosis to death was 28 months. Shorter survival was associated with older age at diagnosis, female sex, bulbar onset, shorter interval between symptom onset and diagnosis, and reduced lung function. Shorter survival from diagnosis to death had a weak inverse association with blood lead (hazard ratio = 0.9; 95% confidence interval, 0.8-1.0) and a stronger inverse association with patella lead (0.5; 0.2-1.0) and tibia lead (0.3; 0.1-0.7); similar results were found for survival from symptom onset to death.

conclusionsThese results suggest that lead exposure is associated with longer survival in ALS cases and, if confirmed, may shed light on mechanisms involved in disease progression.

Indexed as

AdultAgedAge FactorsAmyotrophic Lateral SclerosisBone and BonesCase-Control StudiesEnvironmental ExposureFemaleHumansLeadMaleMiddle AgedSex FactorsSmokingSurvival AnalysisLeadamyotrophic lateral sclerosisleadprognosissurvival

Identifiers

PMID18629318
PMCPMC2453164
OpenAlexW1991504913

What OpenQuestion holds

Textmetadata
LicenceCC0
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.