Evidence map›Paper›PMID 37691886›Full record

ArticleThe Lancet regional health. Western Pacific2023

Caffeine intake interacts with Asian gene variants in Parkinson's disease: a study in 4488 subjects.

Yi-Lin Ong, Xiao Deng, Hui-Hua Li, K Narasimhalu, Ling-Ling Chan, Kumar M Prakash, Wing-Lok Au, Pavanni Ratnagopal, Louis C S Tan, Eng-King Tan

Open access · goldAbstract read
In one paragraph

Article in The Lancet regional health. Western Pacific, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 16 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Lifestyle medicine for neuroprotection: evidence and implementation in Asian contexts.Journal of neural transmission (Vienna, Austria : 1996) · 2026
    Review
  4. Review
  5. Article
  6. Review
  7. Article
  8. Article
  9. Caffeine in Aging Brains: Cognitive Enhancement, Neurodegeneration, and Emerging Concerns About Addiction.International journal of environmental research and public health · 2025
    Review
  10. Article
  11. Review
  12. Article
  13. Article
  14. Parkinson's Disease is Predominantly a Genetic Disease.Journal of Parkinson's disease · 2024
    Review
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

10 authors at 4 institutions in 1 country.

Yi-Lin OngDuke-NUS Medical School, Singapore.
Xiao DengNational Neuroscience Institute, Singapore.
Hui-Hua LiNational Dental Centre, Singapore.
K NarasimhaluDuke-NUS Medical School, Singapore.
Ling-Ling ChanDiagnostic Radiology, Singapore General Hospital, Singapore.
Kumar M PrakashDuke-NUS Medical School, Singapore.
Wing-Lok AuNational Neuroscience Institute, Singapore.
Pavanni RatnagopalDuke-NUS Medical School, Singapore.
Louis C S TanNational Neuroscience Institute, Singapore.
Eng-King TanDuke-NUS Medical School, Singapore.
Duke-NUS Medical School · SGNational Neuroscience Institute · SGNational Dental Centre of Singapore · SGSingapore General Hospital · SG

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Caffeine intake reduces risk of Parkinson's disease (PD), but the interaction with genes is unclear. The interaction of caffeine with genetic variants in those at high PD risk has healthcare importance. We investigate interactions of caffeine intake with risk variants found in Asians, and determine PD risk estimates in caffeine-drinkers carrying these variants. Methods: PD patients and controls without neurological disorders were included. Caffeine intake was assessed using a validated evaluation tool. Leucine rich repeat kinase 2 (LRRK2) risk variants were genotyped. Statistical analysis was conducted with logistic regression models. Gene-caffeine interactions were quantified using attributable proportion (AP) due to interaction (positive interaction defined as AP >0). Findings: 5100 subjects were screened and 4488 subjects (1790 PD, 2698 controls) with genetic data of at least one LRRK2 variant were included. Risk-variant-carriers who were non-caffeine-drinkers had increased PD odds compared to wildtype carriers who were caffeine-drinkers for G2385R [OR 8.6 (2.6-28.1) p < 0.001; AP = 0.71], R1628P [OR 4.6 (1.6-12.8) p = 0.004; AP = 0.50] and S1647T [OR 4.0 (2.0-8.1) p < 0.001; AP = 0.55] variants. Interpretation: Caffeine intake interacts with LRRK2 risk variants across three different groups of gene carriers. Asymptomatic risk-variant-carriers who are non-caffeine-drinkers have four to eight times greater PD risk compared to wildtype-caffeine-drinkers. Lifestyle modifications to mitigate PD risk in asymptomatic healthy risk variant carriers have potential roles in our Asian cohort. Funding: This study was supported by the National Medical Research Council (STaR and PD OF LCG 000207 grants) and Duke-NUS Medical School.

Indexed as

CaffeineGene-caffeineLRRK2Parkinsons disease

Identifiers

PMID37691886
PMCPMC10485627
OpenAlexW4386434865

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.