Intra-individual variability in day-to-day and month-to-month measurements of physical activity and sedentary behaviour at work and in leisure-time among Danish adults

Table 4 Variance component analyses of sitting time, standing time, and time spent on moderate-to-vigorous physical activity (MVPA) per day as well as for total steps per day at work, in leisure time and in total (work and leisure time combined)

Model^a	Constant^b	95% CI	RSD^c	ICC^d	Intra-individual variation^e
work sit (min)	323	300–347	0.23	0.46	54%
work stand (min)	102	82–121	0.62	0.49	51%
work steps	3761	3211–4310	0.40	0.50	50%
work MVPA (min)	27	22–31	0.43	0.49	51%
leisure sit (min)	282	264–300	0.21	0.42	58%
leisure stand (min)	97	86–109	0.38	0.46	54%
leisure steps	5682	4919–6446	0.48	0.37	63%
leisure MVPA (min)	47	40–54	0.52	0.41	59%
total sit (min)	606	574–637	0.16	0.50	50%
total stand (min)	199	173–225	0.39	0.57	43%
total steps	9349	8357–10340	0.34	0.43	57%
total MVPA (min)	73	65–81	0.38	0.44	56%

^aMultilevel linear regression model with the activity of interest as dependent variable adjusted for sex, age, educational level and BMI
^bConstant representing mean value for a male participant aged 45 with tertiary education and a BMI below 25
^cRelative standard deviation = standard deviation/mean
^dInterclass correlation coefficient: part of total variance explained by difference between individuals
^ePercentage of total variance explained by variation within individual

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