Reproducibility of domain-specific physical activity over two seasons in children

BMC Public Health

Table 3 The reproducibility of different outcome variables for one out of two weeks of measurement for a 7-d week, weekdays and weekend days, applying a ≥ 3 weekdays and ≥ 1 weekend day wear time criterion (n = 465 (69%) children)

	7-day Week			Weekdays			Weekend days
	ICC_s	LoA	N	ICC_s	LoA	N	ICC_s	LoA	N
	Not corrected for season (absolute agreement definition)
Overall PA (cpm)	0.31	421	9.1	0.38	395	6.6	0.01	818	291
SED (min/day)	0.60	74.2	2.6	0.59	78.5	2.8	0.32	134	8.4
LPA (min/day)	0.66	49.5	2.1	0.62	53.3	2.5	0.43	89.2	5.4
MPA (min/day)	0.55	21.2	3.3	0.54	23.1	3.4	0.21	36.0	14.8
VPA (min/day)	0.43	25.9	5.2	0.47	27.4	4.5	0.09	41.6	38.3
MVPA (min/day)	0.52	42.1	3.7	0.54	44.9	3.5	0.16	70.1	21.1
	Corrected for season (consistency definition)
Overall PA (cpm)	0.51	329	3.9	0.55	316	3.2	0.11	742	31.4
SED (min/day)	0.65	68.3	2.1	0.63	73.5	2.4	0.35	129	7.3
LPA (min/day)	0.66	49.2	2.1	0.62	53.2	2.5	0.43	88.8	5.3
MPA (min/day)	0.59	19.8	2.8	0.58	21.8	2.9	0.24	35.0	12.5
VPA (min/day)	0.61	20.4	2.6	0.62	22.2	2.5	0.19	37.9	17.5
MVPA (min/day)	0.64	34.8	2.2	0.64	38.1	2.2	0.23	65.2	13.5

PA Physical activity; cpm Counts per minute; SED Sedentary time; LPA Light physical activity; MPA Moderate physical activity; VPA Vigorous physical activity; MVPA Moderate-to-vigorous physical activity; ICC_s Intra-class correlation for a single week of measurement adjusted for wear time; N Number of weeks needed to achieve a ICC = 0.80; LoA 95% Limits of agreement. Estimates not corrected for season are derived from one-way random effect models (i.e., using an absolute agreement definition of reproducibility), whereas models corrected for season are derived from two-way mixed effect models (i.e., using a consistency definition of reproducibility)

ISSN: 1471-2458