Background: Previous research has shown an excess risk of COVID-19 among several occupations, but data on public transport workers are scarce. To investigate the occupational risk posed by contact with the public, we followed up the incidence of COVID-19 in a cohort of public transport workers. Methods: We identified the incident cases of COVID-19 between 1 September 2020 -6 May 2021 in a cohort of 2,052 employees of a public transport agency in Sardinia, Italy. The diagnosis of COVID-19 was based on a positive molecular test. To calculate the expected events, we applied the age-and gender-specific incidence rates in the regional population at the same time frame to the cor-respondent strata of the study cohort. We estimated the age-and gender-adjusted relative risk (RR) of COVID-19 as the ratio between the observed and the expected events and its 95% confidence interval (95% C.I.) among the total cohort and in two sub-cohorts: bus drivers and the rest of the personnel (administrative staff, train and metro drivers, workers in the mechanical shop, and in the railroad maintenance, and security). Results: Bus drivers run an elevated risk of COVID-19 (RR = 1.4, 95% C.I. 1.07 -1.79). There was no excess risk among the rest of the personnel. Conclusions: Our study suggests an excess risk of COVID-19 among bus drivers even in a relatively low incidence area, which could imply inadequacy of the preventive measures put in place. Additional studies of larger size with detailed information on personal and lifestyle characteristics are warranted.

COVID-19 incidence in a cohort of public transport workers

De Matteis, Sara
Primo
;
Cocco, Pierluigi
2022-01-01

Abstract

Background: Previous research has shown an excess risk of COVID-19 among several occupations, but data on public transport workers are scarce. To investigate the occupational risk posed by contact with the public, we followed up the incidence of COVID-19 in a cohort of public transport workers. Methods: We identified the incident cases of COVID-19 between 1 September 2020 -6 May 2021 in a cohort of 2,052 employees of a public transport agency in Sardinia, Italy. The diagnosis of COVID-19 was based on a positive molecular test. To calculate the expected events, we applied the age-and gender-specific incidence rates in the regional population at the same time frame to the cor-respondent strata of the study cohort. We estimated the age-and gender-adjusted relative risk (RR) of COVID-19 as the ratio between the observed and the expected events and its 95% confidence interval (95% C.I.) among the total cohort and in two sub-cohorts: bus drivers and the rest of the personnel (administrative staff, train and metro drivers, workers in the mechanical shop, and in the railroad maintenance, and security). Results: Bus drivers run an elevated risk of COVID-19 (RR = 1.4, 95% C.I. 1.07 -1.79). There was no excess risk among the rest of the personnel. Conclusions: Our study suggests an excess risk of COVID-19 among bus drivers even in a relatively low incidence area, which could imply inadequacy of the preventive measures put in place. Additional studies of larger size with detailed information on personal and lifestyle characteristics are warranted.
2022
COVID-19
occupation
occupational disease
bus drivers
cohort study
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/368944
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