What is the association between leukocyte telomere length and the risk of cancer incidence and all-cause mortality in a large prospective cohort of Chinese adults?
Telomere Support (Int J Cancer 2020, PMID 33459354) — longer telomeres were associated with a lower risk of all-cause mortality (HR = 0.93), noncancer death (HR = 0.81), and specifically, death from chronic obstructive pulmonary disease and pneumonia (HR = 0.79) and digestive diseases (HR = 0.60). The abstract for Telomere Support states no limitations.
Source: Int J Cancer 2020, PMID 33459354 ↗ · Research map · How Magellan grades evidence · evidence confidence: medium
Int J Cancer · 2020 · PMID 33459354 · DOI 10.1002/ijc.33211
Longer telomeres are linked to a higher risk of cancer but a lower risk of non-cancer related death in Chinese adults.
The question
What is the association between leukocyte telomere length and the risk of cancer incidence and all-cause mortality in a large prospective cohort of Chinese adults?
What they tested
The study aims to investigate the association of leukocyte telomere length with risk of cancer incidence and all-cause mortality.
How they did it
Relative telomere lengths were quantified using quantitative real-time PCR in genomic DNA from peripheral blood samples of 26,540 middle-aged or older Chinese adults. Hazard ratios (HRs) and 95% confidence intervals (CIs) for cancer and deaths by quintiles of telomere length were calculated using Cox proportional hazards regression, adjusted for age, sex, and other potential confounders.
What they found
After baseline, 4,353 persons developed cancer and 7,609 died. Participants with the longest decile of telomeres had a 26% higher risk of total cancer incidence compared to the shortest decile. Longer telomeres were associated with a lower risk of all-cause mortality (HR = 0.93), noncancer death (HR = 0.81), and specifically, death from chronic obstructive pulmonary disease and pneumonia (HR = 0.79) and digestive diseases (HR = 0.60).
| Total Cancer Incidence (Longest vs. Shortest Decile) | 26 | |
|---|---|---|
| All-Cause Mortality (Longer Telomeres) | 0.93 | |
| Noncancer Death (Longer Telomeres) | 0.81 | |
| Death from COPD and Pneumonia (Longer Telomeres) | 0.79 | |
| Death from Digestive Diseases (Longer Telomeres) | 0.6 |
The chart shows the percentage increase in total cancer incidence for the longest telomere decile compared to the shortest, and hazard ratios for different mortality outcomes associated with longer telomeres.
What it means
Longer telomeres are associated with an increased risk of overall cancer development and several specific cancer types, but also with a reduced risk of noncancer-related death.
Limitations
The abstract does not explicitly state any limitations of the study.
Where the published abstract does not list limitations, we say so rather than inventing them. Read the full paper on PubMed before drawing conclusions.
The paper at a glance
| Title | Leukocyte telomere length, cancer incidence and all-cause mortality among Chinese adults |
|---|---|
| Journal | Int J Cancer |
| Year | 2020 |
| PMID | 33459354 ↗ |
| DOI | 10.1002/ijc.33211 ↗ |
| Topic | Biological age, epigenetics & aging clocks |
Read the source: PubMed record (authors, abstract, full citation) ↗ · Publisher via doi.org ↗
Where Magellan uses this paper
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Telomere Support
Telomere attrition is one of the recognised hallmarks of aging, and shorter telomeres are associated in meta-analyses with increased all-cause mortality and age-related disease. Protecting telomere length is therefore a target of interest, though it is one factor among many in biological aging.
Molecules & mechanisms in this paper
Each of these is named in the paper’s own words above. Open the monograph for the full mechanism and its other citations.
Cite this page
These citations point at this summary. To cite the original paper with its full author list, use the PubMed record or doi.org.
Magellan Longevity. (2026). What is the association between leukocyte telomere length and the risk of cancer incidence and all-cause mortality in a large prospective cohort of Chinese adults? [Plain-English summary of Int J Cancer 2020, PMID 33459354, DOI 10.1002/ijc.33211]. Magellan Longevity. https://magellanlongevity.com/study/x9.html@misc{magellan_x9,
title = {What is the association between leukocyte telomere length and the risk of cancer incidence and all-cause mortality in a large prospective cohort of Chinese adults?},
author = {{Magellan Longevity}},
year = {2026},
howpublished = {\url{https://magellanlongevity.com/study/x9.html}},
note = {Plain-English summary of PubMed PMID 33459354; DOI 10.1002/ijc.33211; Int J Cancer 2020. Reviewed by Gabriel Radu, DO},
urldate = {2026-08-11}
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