Evidence map›Paper›PMID 38253196›Full record

ArticleEnvironmental research2024

Effects of long-term indoor air purification intervention on cardiovascular health in elderly: a parallel, double-blinded randomized controlled trial in Hong Kong.

Xi Xia, Ka Hung Chan, Timothy Kwok, ShaoWei Wu, Chung Ling Man, Kin-Fai Ho

Open access · hybridAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Environmental research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed
3.1field-weighted citation impact, top 9% 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, 10 citations in OpenAlex.

  1. Trial
  2. Health Benefits of Air Purification: A Systematic Review.Environment & health (Washington, D.C.) · 2026
    Review
  3. The potential role of dietary patterns in modifying the association between ambient PMEnvironmental health : a global access science source · 2026
    Article
  4. Bedroom Air Purification and Home Blood Pressure.Journal of clinical hypertension (Greenwich, Conn.) · 2026
    Article
  5. Review
  6. Review
  7. Review
  8. Joint exposure to PMFrontiers in public health · 2025
    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 3 institutions in 4 countries.

Xi XiaDepartment of Occupational and Environmental Health, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, China; School of Public Health, Shaanxi University of Chinese Medicine, China; The Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong.
Ka Hung ChanClinical Trial Service Unit and Epidemiological Studies Unit, Nuffield Department of Population Health, University of Oxford, UK; Oxford British Heart Foundation Centre of Research Excellence, University of Oxford, UK. Electronic address: kahung.chan@ndph.ox.ac.uk.
Timothy KwokDepartment of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong, China; The Jockey Club Centre for Osteoporosis Care and Control, The Chinese University of Hong Kong, Hong Kong, China.
ShaoWei WuDepartment of Occupational and Environmental Health, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, China.
Chung Ling ManThe Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong.
Kin-Fai HoThe Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong. Electronic address: kfho@cuhk.edu.hk.
Chinese University of Hong Kong · HKMinistry of Education of the People's Republic of China · CNBritish Heart Foundation · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Ambient fine particulate matter (PM

Indexed as

Air FiltersAir PollutantsAir PollutionAir Pollution, IndoorCardiovascular DiseasesCardiovascular SystemAgedHong KongHumansParticulate MatterRandomized Controlled Trials as TopicAir PollutantsParticulate MatterCardiovascular healthElderlyIndoor air purifierLong-term

Identifiers

PMID38253196
PMCPMC11850294
OpenAlexW4391069428

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.