Evidence map›Paper›PMID 34710999›Full record

ReviewAsian Pacific journal of cancer prevention : APJCP2021

Lactate Dehydrogenase Levels in the Saliva of Cigarette and E-Cigarette Smokers (Vapers): A Comparative Analysis.

Anitha Krishnan Pandarathodiyil, Anand Ramanathan, Ranjana Garg, Jennifer Geraldine Doss, Fazliny Binti Abd Rahman, Wan Maria Nabillah Ghani, Saman Warnakulasuriya

Open access · goldAbstract readComparative StudyReview
In one paragraph

Review in Asian Pacific journal of cancer prevention : APJCP, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed, 1 pooled it
1.8field-weighted citation impact, top 15% 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

13 citing papers in PubMed, 1 synthesis or guideline pooled it, 22 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. E-cigarette: a safe tool or a risk factor for oral cancer? A systematic review.Journal of clinical and experimental dentistry · 2025
    Review
  6. Review
  7. Review
  8. Article
  9. Article
  10. Review
  11. Lactate Dehydrogenase: The Beacon of Hope?Journal of pharmacy & bioallied sciences · 2022
    Article
  12. Article
  13. 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

7 authors at 2 institutions in 2 countries.

Anitha Krishnan PandarathodiyilDepartment of Oral Diagnostic Sciences, Faculty of Dentistry, SEGI University, Jalan Teknologi, Kota Damansara, Petaling Jaya, Selangor, Malaysia.ORCID 0000-0002-5436-0138
Anand RamanathanDepartment of Oral & Maxillofacial Clinical Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.ORCID /0000-0001-6496-7139
Ranjana GargDepartment of Oral Diagnostic Sciences, Faculty of Dentistry, SEGI University, Jalan Teknologi, Kota Damansara, Petaling Jaya, Selangor, Malaysia.ORCID 0000-0002-0124-511X
Jennifer Geraldine DossOral Cancer Research & Coordinating Centre (OCRCC), Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.ORCID 0000-0003-2511-7523
Fazliny Binti Abd RahmanDepartment of Oral Diagnostic Sciences, Faculty of Dentistry, SEGI University, Jalan Teknologi, Kota Damansara, Petaling Jaya, Selangor, Malaysia.ORCID 0000-0001-9031-4553
Wan Maria Nabillah GhaniOral Cancer Research & Coordinating Centre (OCRCC), Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia.ORCID 0000-0002-6782-558X
Saman WarnakulasuriyaFaculty of Dentistry, Oral and Craniofacial Sciences, King's College London, United Kingdom.
University of Malaya · MYKing's College London · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundWe examined the lactate dehydrogenase (LDH) enzyme levels in the saliva of vapers (e-cigarette users) and compared the data with cigarette smokers and a control group of non-smokers and non-vapers.

methodsSubjects were recruited among those responding to a social media announcement or patients attending the SEGi Oral Health Care Centre between May and December 2019, and among some staff at the centre. Five ml of unstimulated   whole saliva was collected and salivary LDH enzyme activity levels were measured with a LDH colorimetric assay kit. Salivary LDH activity level was determined for each group and compared statistically.

resultsEighty-eight subjects were categorized into three groups (control n=30, smokers n=29, and vapers n=29). The mean ± standard deviation (SD) values for salivary LDH activity levels for vapers, smokers, and control groups were 35.15 ± 24.34 mU/ml, 30.82 ± 20.73 mU/ml, and 21.45 ± 15.30 mU/ml, respectively. The salivary LDH activity levels of smoker and vaper groups were significantly higher than in the control group (p = 0.031; 0.017). There was no significant difference of salivary LDH activity level in vapers when compared with smokers (p= 0.234).

conclusionOur findings showed higher LDH levels in the saliva of vapers when compared with controls, confirming cytotoxic and harmful effects of e-cigarettes on the oral mucosa.

Indexed as

Electronic Nicotine Delivery SystemsSmokersTobacco ProductsAdultAgedArea Under CurveFemaleHumansL-Lactate DehydrogenaseMaleMiddle AgedNon-SmokersROC CurveSalivaSensitivity and SpecificityYoung AdultL-Lactate DehydrogenaseEnzyme, e-cigarettesLDHSalivasmokers

Identifiers

PMID34710999
PMCPMC8858253
OpenAlexW3209817154

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.