Evidence map›Paper›PMID 33459872›Full record

ArticleInternational archives of occupational and environmental health2021

Occupational exposures and respiratory symptoms and lung function among hairdressers in Iran: a cross-sectional study.

Behzad Heibati, Maritta S Jaakkola, Taina K Lajunen, Alan Ducatman, Zahra Bamshad, Samira Eslamizad, Fatemeh Shafee, Ali Karimi, Jouni J K Jaakkola

Open access · hybridAbstract read
In one paragraph

Article in International archives of occupational and environmental health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.

0numbers the graph read from it
0cells of the map it votes in
9citing 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

9 citing papers in PubMed, 17 citations in OpenAlex.

  1. Review
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  9. Lung Function Tests in Hairdressers of Gangtok: A Cross-Sectional Study.Indian journal of occupational and environmental medicine
    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

9 authors at 6 institutions in 3 countries.

Behzad HeibatiCenter for Environmental and Respiratory Health Research, Faculty of Medicine, University of Oulu, Aapistie 5B, P.O. Box 5000, 90014, Oulu, Finland.
Maritta S JaakkolaCenter for Environmental and Respiratory Health Research, Faculty of Medicine, University of Oulu, Aapistie 5B, P.O. Box 5000, 90014, Oulu, Finland.
Taina K LajunenCenter for Environmental and Respiratory Health Research, Faculty of Medicine, University of Oulu, Aapistie 5B, P.O. Box 5000, 90014, Oulu, Finland.
Alan DucatmanWest Virginia University School of Public Health, Morgantown, WV, USA.
Zahra BamshadDepartment of Occupational Health, School of Public Health, Shiraz University of Medical Sciences, Shiraz, Iran.
Samira EslamizadFood Safety Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
Fatemeh ShafeeDepartment of Occupational Health, School of Public Health, Shiraz University of Medical Sciences, Shiraz, Iran.
Ali Karimi *Department of Occupational Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. a_karimi@sina.tums.ac.ir.
Jouni J K Jaakkola *Center for Environmental and Respiratory Health Research, Faculty of Medicine, University of Oulu, Aapistie 5B, P.O. Box 5000, 90014, Oulu, Finland. jouni.jaakkola@oulu.fi.ORCID http://orcid.org/0000-0003-4168-4683
Oulu University Hospital · FIShiraz University of Medical Sciences · IRFinnish Meteorological Institute · FIShahid Beheshti University of Medical Sciences · IRTehran University of Medical Sciences · IRWest Virginia University · US

Funding

Academy of Finland 310372Shiraz University of Medical Sciences 93-7225
6 · The paper itself

Abstract

objectiveExposures at hairdressers' work have been reported to lead to an increased risk of several health outcomes. The present study aimed to investigate the relations between occupational exposures and respiratory symptoms and lung function among hairdressers in Iran.

methodsWe conducted a cross-sectional study to compare potential respiratory effects among 140 women working as hairdressers to such effects among 140 women working as office workers (administrative personnel). Both groups worked in Shiraz, Iran. Respiratory symptoms were assessed by a standard respiratory questionnaire. The questionnaire also inquired about substances used and workspace conditions, including ventilation type. Lung function levels were measured by spirometry.

resultsRespiratory symptoms, including cough, wheezing, shortness of breath, and chest tightness were significantly more frequent in hairdressers compared to the reference group (p < 0.05). After controlling for potential confounders, hairdressers had a prevalence ratio (PR) of 2.18 (95% CI 1.26-3.77) for cough, 9.59 (95% CI 1.004-91.73) for wheezing, 2.06 (95% CI 1.25-3.39) for shortness of breath, and 3.31 (95% CI 1.84-5.97) for chest tightness compared to the reference group. Lung function parameters (including VC, FVC, and FEV1) were significantly reduced in hairdressers (p < 0.001). Absence of air conditioning predicted greater reduction in lung function (p < 0.05) in the exposed. Decrease in FVC with normal FEV1/FVC in the exposed group suggested existence of restrictive lung function.

conclusionsThis study provides evidence of increased prevalence of respiratory symptoms and restrictive lung function impairment among hairdressers in Iran.

Indexed as

BarberingOccupational ExposureAdultCoughCross-Sectional StudiesDyspneaFemaleHumansIranLungOccupational DiseasesPrevalenceRespiratory Function TestsRespiratory SoundsHairdressingLung functionOccupational exposuresRespiratory symptomsSpirometry

Identifiers

PMID33459872
PMCPMC8238693
OpenAlexW3124378006

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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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.