Global prevalence of oral pigmentation and its related factors: a systematic review and meta-analysis

Ali Rotbeh; Mohsen Kazeminia; Mahsa Kalantari; Fatemeh Rajati

doi:10.1016/j.jormas.2022.01.009

Global prevalence of oral pigmentation and its related factors: a systematic review and meta-analysis

J Stomatol Oral Maxillofac Surg. 2022 Oct;123(5):e411-e424. doi: 10.1016/j.jormas.2022.01.009. Epub 2022 Jan 20.

Authors

Ali Rotbeh¹, Mohsen Kazeminia¹, Mahsa Kalantari², Fatemeh Rajati³

Affiliations

¹ Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran.
² Oral and Dental Diseases Research Center, Department of Oral and Maxillofacial Pathology, School of Dentistry, Kerman University of Medical Sciences, Kerman, Iran.
³ Research Center for Environmental Determinants of Health, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran. Electronic address: f.rajati@kums.ac.ir.

PMID: 35066171
DOI: 10.1016/j.jormas.2022.01.009

Abstract

Background: Oral pigmentation is due to the accumulation of one or more pigments in tissues, causing changes in the color of the oral mucosal surfaces. Understanding the exact global prevalence of oral pigmentation and its associated factors helps researchers make the proper interventions at the right time; in this respect, the objective of the present systematic review and meta-analysis was to determine the global prevalence of oral pigmentation and its related factors.

Method: A systematic review and meta- analysis were conducted using the following databases: Magiran, SID, Scopus, Embase, PubMed, Web of Science (WoS), and Google Scholar. The search was run to retrieve articles published from inception until July 2021, and the following keywords were applied in the search strategy: "Epidemiolo*", "Prevalen*", "Factor*", "Pigment*", "Mouth", and "Oral". The I² index was used to assess the heterogeneity of the studies, and Egger's test was used to examine the publication bias.

Results: Sixty-nine articles, with a sample size of 70,668 people, meeting the inclusion criteria were included in the study. The pooled of prevalence of oral pigmentation was estimated to be 20.8% (95% confidence interval: 17.1-1.25%). The prevalence of oral pigmentation raised significantly towards the end of the timespan covered by the study (P˂ 0.001). The majority of the examined studies reported that the prevalence of oral pigmentation is significantly higher in men, smokers or those exposed to secondhand smoke, people with fair skin, and who were affected by Yusho patients.

Conclusion: The results of the present study show that the prevalence of oral pigmentation is high, with higher prevalence in men, smokers or those exposed to cigarette smoke, people with fair skin, and Yusho patients compared to other groups. It is recommended that. these findings be used in policy makers' decisions to deliver better health care.

Keywords: Meta-analysis; Mouth; Pigmentation; Prevalence; Review.

Publication types

Meta-Analysis
Systematic Review
Research Support, Non-U.S. Gov't

MeSH terms

Humans
Male
Prevalence
Tobacco Smoke Pollution*

Substances

Tobacco Smoke Pollution