Evidence map›Paper›PMID 35971142›Full record

SynthesisBMC medicine2022

The accuracy of pulse oximetry in measuring oxygen saturation by levels of skin pigmentation: a systematic review and meta-analysis.

Chunhu Shi, Mark Goodall, Jo Dumville, James Hill, Gill Norman, Oliver Hamer, Andrew Clegg, Caroline Leigh Watkins, George Georgiou, Alexander Hodkinson and 3 more

Registry-linked trialOpen access · goldAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in BMC medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05915845 (Effects of Laura Mitchell's Relaxation Versus Papworth Exercise on Dyspnea, Fatigue, and Sleep Quality in Ashmatic Patient), which is not on this map. Cited by 70 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
70citing papers in PubMed, 3 pooled it
10.3field-weighted citation impact, top 1% 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.

NCT05915845 naunknown statusnot on this mapstarted 2023, after this paper: background citation

Effects of Laura Mitchell's Relaxation Versus Papworth Exercise on Dyspnea, Fatigue, and Sleep Quality in Ashmatic Patient

TypeinterventionalSponsorRiphah International UniversityRan2023 to 2023Enrolled46ConditionsAsthmaticArmsLaura Mitchell's Relaxation technique, Papworth exercise
3 · Its place in the literature

Who cites it

70 citing papers in PubMed, 3 syntheses or guidelines pooled it, 134 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Article
  5. Review
  6. Real-Time SpOSensors (Basel, Switzerland) · 2026
    Article
  7. Article
  8. Review
  9. Observational
  10. Review
  11. Article
  12. Article
  13. Review
  14. The digital divide in cardiovascular care: who gets left behind?European heart journal. Digital health · 2026
    Article
  15. Article
  16. Article
  17. Article
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  19. Review
  20. Article

10 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

13 authors at 4 institutions in 1 country.

Chunhu ShiSchool of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Jean McFarlane Building, Oxford Rd, Manchester, M13 9PL, UK. chunhu.shi@manchester.ac.uk.ORCID 0000-0003-0151-0451
Mark GoodallInstitute of Population Health, University of Liverpool, Liverpool, L69 3GF, UK.
Jo DumvilleSchool of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Jean McFarlane Building, Oxford Rd, Manchester, M13 9PL, UK.
James HillNIHR Applied Research Collaboration North West Coast (ARC-NWC), Manchester, UK.
Gill NormanSchool of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Jean McFarlane Building, Oxford Rd, Manchester, M13 9PL, UK.
Oliver HamerNIHR Applied Research Collaboration North West Coast (ARC-NWC), Manchester, UK.
Andrew CleggNIHR Applied Research Collaboration North West Coast (ARC-NWC), Manchester, UK.
Caroline Leigh WatkinsNIHR Applied Research Collaboration North West Coast (ARC-NWC), Manchester, UK.
George GeorgiouNIHR Applied Research Collaboration North West Coast (ARC-NWC), Manchester, UK.
Alexander HodkinsonNIHR School for Primary Care Research, Division of Population Health, Health Services Research and Primary Care, School of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Manchester, M13 9PL, UK.
Catherine Elizabeth LightbodyFaculty of Health, University of Central Lancashire, Preston, PR1 2HE, UK.
Paul DarkNIHR Manchester Biomedical Research Centre, University of Manchester, Manchester, M13 9WL, UK.
Nicky CullumSchool of Health Sciences, Faculty of Biology, Medicine and Health, Manchester Academic Health Science Centre, University of Manchester, Jean McFarlane Building, Oxford Rd, Manchester, M13 9PL, UK.
University of Lancashire · GBManchester Academic Health Science Centre · GBSalford Royal NHS Foundation Trust · GBUniversity of Liverpool · GB

Funding

Department of Health
6 · The paper itself

Abstract

backgroundDuring the COVID-19 pandemic, there have been concerns regarding potential bias in pulse oximetry measurements for people with high levels of skin pigmentation. We systematically reviewed the effects of skin pigmentation on the accuracy of oxygen saturation measurement by pulse oximetry (SpO

methodsWe searched Ovid MEDLINE, Ovid Embase, EBSCO CINAHL, ClinicalTrials.gov, and WHO International Clinical Trials Registry Platform (up to December 2021) for studies with SpO

resultsWe included 32 studies (6505 participants): 15 measured skin pigmentation and 22 referred to ethnicity. Compared with standard SaO

conclusionsPulse oximetry may overestimate oxygen saturation in people with high levels of skin pigmentation and people whose ethnicity is reported as Black/African American, compared with SaO

Indexed as

COVID-19Skin PigmentationHumansOximetryOxygenOxygen SaturationPandemicsOxygenArterial blood oxygen saturationEthnicityMeasurement biasPulse oximetrySkin pigmentationSystematic review

Identifiers

PMID35971142
PMCPMC9377806
OpenAlexW4291754627

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

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.