Evidence map›Paper›PMID 21474560›Full record

ArticleThe journals of gerontology. Series A, Biological sciences and medical sciences2011

Plasma klotho and mortality risk in older community-dwelling adults.

Richard D Semba, Anne R Cappola, Kai Sun, Stefania Bandinelli, Mansi Dalal, Candace Crasto, Jack M Guralnik, Luigi Ferrucci

Open access · bronzeAbstract readComparative StudyMulticenter Study
In one paragraph

Article in The journals of gerontology. Series A, Biological sciences and medical sciences, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 116 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
116citing papers in PubMed, 1 pooled it
6.7field-weighted citation impact, top 3% 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

116 citing papers in PubMed, 1 synthesis or guideline pooled it, 200 citations in OpenAlex.

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  16. Biomarkers of ageing of humans and non-human primates.Nature reviews. Molecular cell biology · 2025
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56 more citing papers are in PubMed but not listed here.

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

8 authors at 6 institutions in 2 countries.

Richard D SembaBaltimore, MD 21287, USA. rdsemba@jhmi.edu
Anne R Cappola
Kai Sun
Stefania Bandinelli
Mansi Dalal
Candace Crasto
Jack M Guralnik
Luigi Ferrucci
Johns Hopkins University · USAzienda Sanitaria di Firenze · ITBaltimore City Health Department · USJohns Hopkins Medicine · USNational Institute on Aging · USUniversity of Pennsylvania · US

Funding

Oxidative stress and the pathogenesis of sarcopenia and disability in older womenR01AG027012 · NIA · JOHNS HOPKINS UNIVERSITY · PI SEMBA, RICHARD D · 2005 to 2018
$3.6M
The InChianti StudyZIAAG001050 · NIA · NATIONAL INSTITUTE ON AGING · PI FERRUCCI, LUIGI · 2009 to 2025
$2.1M
HISPANIC SECONDARY STROKE PREVENTION INITIATIVER01MD009164 · NIMHD · UNIVERSITY OF MIAMI SCHOOL OF MEDICINE · PI CARRASQUILLO, OLVEEN · 2014 to 2018
$1.9M
Genetic Analysis Of Klotho In Diseases Of AgingZIAAG000669 · NIA · NATIONAL INSTITUTE ON AGING · PI FERRUCCI, LUIGI · 2009 to 2013
$474k
THE INCHIANTI FOLLOW-UP STUDY-260012111N01AG012111 · NIA · ITALIAN NATL. INST. ON AGING · 2003 to 2003
–
Intramural NIH HHSNIA NIH HHS N01-AG-5-0002NIA NIH HHS N.1-AG-1-1NIA NIH HHS N.1-AG-1-2111NIA NIH HHS R01 AG027012NIMHD NIH HHS 263 MD 821336NIMHD NIH HHS 263 MD 9164
6 · The paper itself

Abstract

backgroundThe aging-suppressor gene klotho encodes a single-pass transmembrane protein that in mice is known to extend life span when overexpressed and resemble accelerated aging when expression is disrupted. It is not known whether there is a relationship between plasma levels of secreted klotho protein and longevity in humans.

methodsWe measured plasma klotho in 804 adults, greater than or equal to 65 years, in the InCHIANTI study, a longitudinal population-based study of aging in Tuscany, Italy.

resultsDuring 6 years of follow-up, 194 (24.1%) of the participants died. In a multivariate Cox proportional hazards model, adjusting for age, sex, education, body mass index, physical activity, total cholesterol, high-density lipoprotein cholesterol, cognition, 25-hydroxyvitamin D, parathyroid hormone, serum calcium, mean arterial pressure, and chronic diseases, participants in the lowest tertile of plasma klotho (<575 pg/mL) had an increased risk of death compared with participants in the highest tertile of plasma klotho (>763 pg/mL; hazards ratio 1.78, 95% confidence interval 1.20-2.63).

conclusionsIn older community-dwelling adults, plasma klotho is an independent predictor of all-cause mortality. Further studies are needed to elucidate the potential biological mechanisms by which circulating klotho could affect longevity in humans.

Indexed as

AgedAgingBiomarkersCause of DeathConfidence IntervalsEnzyme-Linked Immunosorbent AssayFemaleFollow-Up StudiesGeriatric AssessmentGlucuronidaseHumansItalyKlotho ProteinsLongevityMaleMotor ActivityBiomarkersGlucuronidaseKlotho Proteins

Identifiers

PMID21474560
PMCPMC3143348
OpenAlexW2129598053

What OpenQuestion holds

Textmetadata
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.