Table 1

Age distribution and sickness incidence for women and men eligible for the study and for respondents of the questionnaire

		Eligible for the study				Respondents^1-150
		Women				Men	Women				Men
		n				n	n	%			n	%
	1557		1913		1226	78.7		1410	73.7
Mean age	42.8		39.5		42.9			39.5
Median age	44		39		45			39
Sickness incidence^1-151	52.2		46.1		49.8			41.4

↵1-150 Eight workers lacking information about days at risk were excluded.
↵1-151 Crude sickness incidence/10 000 days at risk.