Table 3.

Incidence rate ratio by country of birth, stratified by economic sectors and adjusted for background variables and job tenure

Economic sector	Country of birth	Model 1		Model 2		Model 3
		IRR	CI 95%	IRR	CI 95%	IRR	CI 95%
Engineering
	HIC	1	-	1	-	1	-
	SMPC	1.80	1.60–2.03	1.80	1.59–2.04	1.77	1.56–2.01
	of which Morocco	2.17	1.91–2.46	2.15	1.88–2.46	2.13	1.86–2.43
Construction
	HIC	1	-	1	-	1	-
	SMPC	1.08	0.97–1.21	1.10	0.98–1.23	Interaction by job tenurea
	of which Morocco	1.42	1.26–1.60	1.41	1.24–1.60	Interaction by job tenurea
Wholesale and retail trade
	HIC	1	-	1	-	1	-
	SMPC	0.94	0.68–1.31	0.96	0.69–1.34	0.91	0.65–1.27
	of which Morocco	2.11	1.55–2.88	2.07	1.51–2.83	Interaction by job tenureb
Transportation and storage
	HIC	1	-	1	-	1	-
	SMPC	1.06	0.85–1.33	1.02	0.81–1.30	0.98	0.77–1.25
	of which Morocco	1.43	1.12–1.83	1.31	1.00–1.70	1.27	0.97–1.66

model 1: unadjusted;

model 2: adjusted for background variables: age (as a continuous variable), firm geographic area (based on Italy’s administrative boundaries), firm size (yearly average number of employees), years of work

model 3: model 2 plus job tenure (as a continuous variable)

^aIRRs stratified by job tenure presented in Table 4

^bIRRs stratified by job tenure presented in Table 5