Major characteristics of 19 studies

Study [citation number]JournalYearCountryStudy typeSample sizePopulation countryPopulation ageOccupational variablesOccupational measurement methodCRS criteriaCRS diagnosis methodStatistical methodsOxford level of evidence
Occupation status, occupation type, or occupational compound
Koh et al. [31]American Journal of Industrial Medicine2009South KoreaCross-sectional (three-time points: 1998, 2001, 2005)1998: 20,829
2001: 20,468
2005: 18,266
South KoreaRange 20–59 yearsOccupation type: legislators and senior officials and managers, professionals, technicians and associated professionals, clerical workers, service workers, sales workers, skilled agricultural and forestry and fishery workers, plant or machinery operators and assemblers, elementary occupations, and homemakerInterview & questionnaire responseSelf-report of CRSInterview & questionnaire responseMultivariable Poisson regression model3
Hox et al. [30]Allergy2012BelgiumCase-control546BelgiumRange 18–65 yearsOccupational substances: relevant or irrelevant
Commonly reported substances: bleach, inorganic dust, paints, cement, thinner, ammonia, white spirit, fuel gas, and acetone
SurveyPrior ESS for CRSMedical recordsMultivariable Poisson regression model3
Thilsing et al. [35]American Journal of Industrial Medicine2012DenmarkCross-sectional3,099DenmarkMean 48.1 yearsOccupation type: blue collar or white collar (classified by ISCO-88 coding system)
Occupational substances: gases, fumes, dust, and smoke; HMW agents, LMW agents, and mixed environments (classified by asthma-specific job exposure matrix)
SurveyEPOS symptom criteriaSurveyGeneralized linear models for the binomial family3
Gao et al. [28]Respiratory Research2016ChinaCross-sectional10,633China0–14 years: n = 644
15–34 years: n = 3,136
35–59 years: n = 4,834
≥ 60 years: n = 2,005
Occupation type: clearance-related jobs, healthcare-related jobs
Occupational substance: dust, poisonous gas, pets, carpet, and damp/moldy environment
SurveyEPOS symptom criteriaSurveyUnivariate & multivariate logistic regression3
Hoffmans et al. [29]PLOS One2018NetherlandsCross-sectional8,347NetherlandsMean 45.4 yearsOccupation status: employed, unemployed, self-employed, not working because of poor health, full-time house person, full-time student, retired, and otherSurveyEPOS symptom criteriaSurveyUnivariate & multivariate logistic regression3
Clarhed et al. [26]Journal of Occupational and Environmental Medicine2018USACross-sectional14,906NorwayRange 16–50 yearsOccupational substance: cooking fumes, car/engine exhaust, strong acids, stone dust, flour/grain dust, wood dust, paper dust, metal dust, cleaning agents, super glue, paint/varnish, welding/metal smoke, sewage, hair care products, animals, moisture/mold/mildew, cold work, and physically strenuous workSurveyEPOS symptom criteriaSurveyUnivariate & multivariate logistic regression3
Veloso-Teles et al. [41]Rhinology Online2018Portugal, DenmarkCross-sectional316 (textile workers = 215; retail workers = 101)PortugalTextile workers mean 50 years
Retail workers mean 41 years
Occupation type: textile workers and retail workers
Occupational substance: dust
InterviewLund Kennedy endoscopic scorePhysician visitComparative statistics3
Velasquez et al. [39]International Forum of Allergy and Rhinology2020USARetrospective cohort234USAMean 51.3 yearsOccupational substance: VGDFFiM and diesel fumesMedical recordsICAR—symptom and objective evidence criteriaMedical recordsComparative statistics3
Clarhed et al. [25]Rhinology Online2020NetherlandsCross-sectional7,952NorwayRange 16–50 yearsOccupational substance: cooking fumes, car/engine exhaust, strong acids, stone dust, flour/grain dust, wood dust, paper dust, metal dust, cleaning agents, super glue, paint/varnish, welding/metal smoke, sewage, hair care products, animals, moisture/mold/mildew, cold work, and physically strenuous workSurveyEPOS symptom criteriaSurveyUnivariate & multivariate logistic regression3
Dietz de Loos et al. [27]Rhinology Online2021NetherlandsCross-sectional364NetherlandsMean 56 yearsOccupational substance: relevant or irrelevant
Commonly reported substances: solvents, cleaning products, reactive chemicals, welding fumes/metal dust, combustion engine exhaust, medications, ammonia, flour, flowers, inorganic dust, latex, animals, and cement
SurveyEPOS symptom and objective evidence criteriaMedical recordsUnivariate & multivariate logistic regression3
Nynäs et al. [33]Healthcare (Basel)2021FinlandProspective cohort99FinlandMean 44 yearsOccupational substance: mold/moisture damageInterviewEPOS symptom and objective evidence criteriaPhysician visitDescriptive statistics3
Tai et al. [34]ENT Journal2024KoreaCross-sectional26,335
(control—24,054; CRS—2,124; CRS + asthma—157)
KoreaControl mean 49.8 years
CRS mean 51.4 years
Occupation type: indoor occupation, outdoor occupation, and unemployedSurveyEPOS symptom criteriaSurveyMultivariate Logistic regression model3
Military occupation
Balali-Mood et al. [36]Human and Experimental Toxicology2011UnknownProspective cohort43IranMean 50.6 yearsOccupation type: veterans
Occupational substance: sulfur mustard
Medical recordsCT scan (normal, partial opacity, complete opacity, and partial and complete opacity)Physician visitSpearman correlation tests 3
Elam et al. [38]Military Medicine2022EnglandCase-control798 (CRS = 399; cerumen impaction = 399)USACRS mean 30.98 years
Cerumen impaction mean 28.77 years
Occupation type: active-duty service members
Occupational substance: PM2.5, PM10, NO2, and ozone
Military Health Systems; EPAPrior CRS diagnosisMedical recordsConditional logistic regression3
Disaster response occupations
Cho et al. [37]Respiratory Medicine2014UnknownNested case cohort179 (CRS = 76)USANot specifiedOccupation type: firefighter
Occupational substance: WTC PM
FDNY medical monitoring and treatment program databasePrior CRS diagnosis with objective evidenceMedical recordsKaplan Meier3
Weakley et al. [42]Occupational and Environmental Medicine2016USARetrospective cohort9,848USAMean 40.1 yearsOccupation type: WTC disaster-response workers
Occupational substance: WTC PM
Employee recordsPrior CRS diagnosis with objective evidenceMedical recordsPiecewise exponential survival models3
Liu et al. [32]Frontiers in Public Health2017USAProspective cohort8,968USAMedian 39.6 yearsOccupational type: firefighter
Occupational substance: WTC PM
SurveyPrior CRS diagnosis with objective evidenceMedical recordsPiecewise exponential survival models3
Putman et al. [40]Occupational and Environmental Medicine2018USA, BelgiumProspective cohort11,926
(firefighters—10,112; EMS—1,814)
USAMean 39.7 yearsOccupation type: firefighters, EMS
Occupational substance: WTC PM
Employment records

Met one of the following criteria:

  • CRS leading to surgical intervention

  • 2+ ICD-10 CRS codes at least 8 weeks apart in EMR with confirmatory CT scan

  • 2+ self-reported sinus symptoms reported on at least 2 different annual medical questionnaires with confirmatory CT

Medical recordsMultivariate Poisson regression model; Multivariate Cox regression model3
D’Andrea and Reddy [43]Frontiers in Public Health2018SwitzerlandProspective cohort44USAMean 43.1 yearsOccupation type: oil spill clean-up workers
Occupational substance: crude oil
Referral from legal representatives regarding oil spill clean-up activitiesPrior CRS diagnosisMedical recordsDescriptive statistics3

Major study characteristics are study and citation number, journal of publication (journal), publication year (year), country, study type, the sample size of study (sample size), the country in which the study population originates (population country), age of study population (population age), occupational variables, method the study used for measuring their occupational variables (occupational measurement method), criteria for defining CRS (CRS criteria), the method which they used to diagnose or retrieve information about CRS (CRS diagnosis method), the main statistical methods used to assess the relationship between CRS and the occupational variables (statistical methods), and the level of evidence as defined by Oxford criteria (Oxford level of evidence). CRS: chronic rhinosinusitis; CT: computed tomography; EMS: emergency medical services; EPA: Environmental Protection Agency; EPOS: European Position Paper on Rhinosinusitis and Nasal Polyps; ESS: endoscopic sinus surgery; FDNY: Fire Department of New York; HMW: high molecular weight; ICAR: International Consensus Statement on Allergy and Rhinology; ICD: International Classification of Diseases; ISCO: International Standard Classification of Occupations; LMW: low molecular weight; NO2: nitrogen dioxide; PM: particulate matter; VGDFFiM: vapors, gases, dust, fumes, fibers, or mists; WTC: World Trade Center