Table 1.

Characteristics of self-employed and workers for employers.

	Self-employed (n = 146)	Workers for employers (n = 291)	p
Gender (%)
Men	52.1	58.1	ns
Mean age in years (standard deviation)	47 (8.6)	31.7 (11.4)	<0.001
Mean seniority in years (standard deviation)	18.9 (10.6)	10.4 (9.9)	<0.001
Tasks performed (%)
Versatile work	37.7	12.7	<0.001
Cooking	69.2	63.2	ns
Washing dishes/cleaning	90.4	74.2	<0.001
Table service	73.3	52.2	<0.001
Material handling	84.2	58.8	<0.001
Entertainment	15.1	9.3	ns
Ventilation systems (%)	62.3	91.8	<0.001
Smoking areas (%)	4.1	5.8	ns
Occupational exposure to passive smoking (%)	71.9	36.4	<0.001
Work schedules
Mean hour of the workday’s end (standard deviation)	21.55 (2.4)	20.40 (3.1)	<0.001
Shift work (%)	88.4	77.7	<0.01