Table 1. Base characteristic for the study population (n = 71)^a.

		n	%
Sex	Men	62	87
	Women	9	13
Age	<30	16	22
	30–59	49	69
	≥60	6	9
Years at current workplace	<5	22	31
	5–9	16	22
	≥10	26	37
Years at current work tasks	<5	26	37
	5–9	19	27
	≥10	18	25
Smoking habits	Non-smoker	48	68
	Ex-smoker	12	17
	Current smoker	2	3

n: number of participants

^a: Not all participants provided information regarding work history and smoking habits