Evidence map›Paper›PMID 31889864›Full record

ArticleSaudi journal of biological sciences2020

Tobacco smoking causes secondary polycythemia and a mild leukocytosis among heavy smokers in Taif City in Saudi Arabia.

Adel Qlayel Alkhedaide

Open access · hybridAbstract read
In one paragraph

Article in Saudi journal of biological sciences, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
0.8field-weighted citation impact, top 28% 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

16 citing papers in PubMed, 32 citations in OpenAlex.

  1. Leukocytosis and tobacco use during pregnancy.International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2026
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  15. Polycythemia-Related Proliferative Ischemic Retinopathy Managed with Smoking Cessation: A Case Report.International journal of environmental research and public health · 2022
    Article
  16. 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

1 author at 1 institution in 1 country.

Adel Qlayel AlkhedaideLaboratory Technology Department, Turabah University College, Taif University, 5137, Unit No. 1, At Taif 26522 - 7360, Saudi Arabia.
Taif University · SA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Tobacco smoking is a common risk factor of cardiovascular diseases, cancers and heart health problems. In Taif, the number of secondary polycythemia patients is increasing dramatically and most of those patients are heavy smokers. Therefore, this study is an attempt to understand the pathophysiological mechanism behind that problem. Whole blood and serum samples were collected from forty healthy people and forty tobacco smokers, voluntary for this study. Complete blood counts revealed a significant increase in the red blood cell count, hemoglobin concentrations, hematocrit and neutrophils with some elevations in total white blood cells, lymphocytes and monocytes. Moreover, serum analysis of both erythropoietin and interleukin-7 showed a significant reduction in their levels among smokers which were about 35% and 65% respectively. Gene expression study showed a significant upregulation of RAG-1, RAG-2 and EPOR-1 genes caused by tobacco smoking. In conclusion, data presented in the current study suggest that tobacco smoking might cause alveolar tissue inflammation and vascular injury causing an immune response that elevates the white blood cells count. Another suggestion is that tobacco smoking defects the pulmonary gaseous exchange mechanism leading to the secondary polycythemia indicated by the increase in red blood cell count, hemoglobin levels, hematocrit and by the low serum erythropoietin levels.

Indexed as

EPOR-1ErythropoietinIL-7LeukocytosisPolycythemiaRAG-1RAG-2SecondarySmoking

Identifiers

PMID31889864
PMCPMC6933161
OpenAlexW2989836227

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.