Table 1.

Description of 8 domains of the job exposure matrix (JEM).

Dimension	Description	Abbreviation used in tables and figures	Levels
1	The number of workers at worksite	Number	Homeworking/lone working (No risk)
			<10 workers/day (Low risk)
			10–30 workers/day (Elevated risk)
			>30 workers/day (High risk)
2	The nature of contacts with co-workers, general public or patients with COVID-19	Nature	Homeworking/lone working (No risk)
			Co-workers only (Low risk)
			General public (Elevated risk)
			Patients, including with C19 (High risk)
3	The risk through contaminated work surfaces and materials	Surfaces	Homeworking/lone working (No risk)
			Frequently sharing contact surfaces with co-workers (Low risk)
			Occasionally sharing contact surfaces with general public (Elevated risk)
			Frequently sharing contact surfaces with general public (High risk)
4	Location of work: indoors or outdoors	Location	Homeworking/lone working (No risk)
			Mostly outdoors (Low risk)
			Partly indoor (Elevated risk)
			Mostly indoor (High risk)
5	The possibility to keep at least 1m of social distance	Distancing	Homeworking/lone working (No risk)
			Always maintained (Low risk)
			Cannot always be maintained (Elevated risk)
			can never be maintained (High risk)
6	The need and usage of face covering	Face covering	Homeworking/lone working (No risk)
			Always (Low risk)
			Not always while in proximity to others (Elevated risk)
			Face covering not feasible (High risk)
7	Job insecurity: proportion of flexible labour contracts	Insecurity	0 (None) 1–10% (Low)
			11–25% (Elevated)
			>25% (High)
8	Migrant workers: proportion of migrant workers	Migrants	0 (None)
			1–10% (Low)
			11–25% (Elevated)
			>25% (High)