Table 3. Forward stepwise multiple linear regressions with workload [METs] as dependent variable.

Objective SenseWear Mini armband data
Model 1: n = 297, adjusted R2 = 0.93	B	SE B	ß	p-value
Constant	2.247	0.157		<0.001
MPA work [min/day]	0.005	0.000	0.736	<0.001
HPA work [min/day]	0.007	0.001	0.118	<0.001
Low- vs. high-intensity group	0.234	0.050	0.135	<0.001
Low- vs. moderate-intensity group	0.156	0.033	0.090	<0.001
Working hours [h/day]	-0.056	0.015	-0.057	<0.001
VHPA work [min/day]	0.031	0.010	0.049	0.002
Flextime: No vs. Yes	-0.086	0.031	-0.050	0.006
Age [yrs]	-0.003	0.001	-0.045	0.011
VO2max [METs]	-0.010	0.005	-0.034	0.039
Subjective International Physical Activity Questionnaire data
Model 2: n = 296, adjusted R2 = 0.74	B	SE B	ß	p value
Constant	4.395	0.439		<0.001
Low- vs. high-intensity group	1.114	0.083	0.650	<0.001
Low- vs. moderate-intensity group	0.326	0.065	0.191	<0.001
BMI [kg/m2]	-0.052	0.008	-0.221	<0.001
MPA work [min/day]	0.001	0.000	0.136	<0.001
Flextime: No vs. Yes	-0.208	0.060	-0.123	0.001
Age [yrs]	-0.008	0.002	-0.126	0.001
Gender: Male vs. Female	-0.263	0.082	-0.158	0.002
Working hours [h/day]	-0.063	0.029	-0.065	0.032
VO2max [METs]	-0.029	0.014	-0.097	0.034
HPA work [min/day]	0.002	0.001	0.070	0.041

B, unstandardized regression coefficient; ß, standardized beta coefficient; BMI, body mass index; METs, metabolic equivalents; MPA / HPA / VHPA, physical activity duration at moderate (3–6 METs) / high (6–9 METs) / very high (≥9 METs) intensity; SE, standard error; VO_2max, maximal oxygen uptake during 20-meter shuttle run test.