Table 3.

Trajectories across 8 years of work demands, physical workload, fatigue and sleep problems for three age groups for the full group and for each occupational group, adjusted for gender

Age groups, all participants	Coeff±SE	Z χ2	Effect size	Coeff±SE	Z χ2	Effect size
	Work demands			Physical workload
18–42 years	−0.006±0.002	3.0**	0.016	−0.038±0.004	9.6***	0.063
43–56 years	−0.017±0.002	9.1***	0.048	−0.033±0.003	10.2***	0.053
57–68 years	−0.039±0.004	10.6*	0.105	−0.028±0.006	5.1***	0.048
Interaction χ2		61.1***			1.9
	Fatigue			Sleep problems
18–42 years	−0.014±0.004	3.3***	0.025	0.028±0.003	8.0***	0.044
43–56 years	−0.014±0.003	4.0***	0.018	0.023±0.003	7.7***	0.039
57–68 years	−0.044±0.006	7.7***	0.059	−0.011±0.005	2.3*	0.019
Interaction χ2		20.3***			39.5***
	Work demands			Physical workload
HWC age groups
18–42 years	−0.018±0.004	4.9***	0.050	−0.012±0.004	3.0**	0.039
43–56 years	−0.033±0.003	7.8***	0.091	−0.007±0.003	2.4**	0.027
57–68 years	−0.055±0.008	6.6***	0.146	−0.003±0.006	0.4	0.009
Interaction χ2		19.5***			2.1
LWC age groups
18–42 years	−0.006±0.003	1.7	0.002	−0.023±0.006	4.1***	0.043
43–56 years	−0.021±0.003	7.7***	0.058	−0.018±0.005	3.9***	0.038
57–68 years	−0.040±0.005	7.4***	0.107	−0.019±0.008	2.5*	0.040
Interaction χ2		33.3***			0.7
BCW age groups
18–42 years	−0.001±0.003	0.3	0.003	−0.065±0.008	8.0***	0.006
43–56 years	−0.004±0.003	1.3	0.012	−0.058±0.006	9.1***	0.080
57–68 years	−0.024±0.006	4.1***	0.066	−0.051±0.013	3.9***	0.066
Interaction χ2		11.9***			1.0
	Fatigue			Sleep problems
HWC age group
18–42 years	−0.017±0.009	1.9	0.019	0.017±0.007	2.4***	0.028
43–56 years	−0.008±0.007	1.0	0.010	0.029±0.007	4.1***	0.054
57–68 years	−0.025±0.012	2.1*	0.034	−0.025±0.012	2.1	0.006
Interaction χ2		1.5			6.2*
LWC age groups
18–42 years	−0.016±0.007	2.4*	0.018	0.027±0.005	5.1***	0.041
43–56 years	−0.017±0.006	3.0**	0.022	0.020±0.005	4.3***	0.033
57–68 years	−0.051±0.009	5.7***	0.087	−0.015±0.007	2.0*	0.026
Interaction χ2		10.6**			20.6***
BCW age groups
18–42 years	−0.009±0.007	1.4	0.011	0.033±0.006	5.7***	0.053
43–56 years	−0.014±0.005	2.5*	0.018	0.024±0.005	5.8***	0.038
57–68 years	−0.047±0.010	4.0***	0.063	−0.012±0.008	1.4	0.021
Interaction χ2		10.6**			16.4***

*P<0.05; **P<0.01; ***P<0.001.

BCW, blue-collar workers; HWC, high white collar workers; LWC, low white collar workers.