Table 3.

Associations between changes in sedentary behavior or physical activity and participation in sports

Dependent variables	Participation in sports both for the school periods and summer vacationa	Boys (No: n = 10, Yes: n = 58)				Girls (No: n = 12, Yes: n = 72)
		Estimated mean	SE	B	P-value	Estimated mean	SE	B	P-value
Δsedentary behavior (min/day)	No	30.0	19.3	28.8	0.138	47.9	15.9	36.4	0.032
	Yes	1.2	9.6	0.0		11.6	6.8	0.0
Δsedentary behavior (min/day) b	No	29.0	19.5	29.5	0.131	48.2	16.1	36.8	0.033
	Yes	-0.5	9.9	0.0		11.3	7.0	0.0
ΔLPA (min/day) Ambulatory	No	−25.9	7.6	−12.2	0.110	−26.4	5.0	−14.0	0.010
	Yes	−13.7	3.8	0.0		−12.4	2.2	0.0
Ambulatory b	No	−26.0	7.7	−12.1	0.117	−26.5	5.1	−14.3	0.009
	Yes	−13.9	4.0	0.0		−12.2	2.2	0.0
Non-ambulatory	No	−39.6	15.5	−17.8	0.253	−35.8	10.2	−9.6	0.374
	Yes	−21.8	7.5	0.0		−26.3	4.4	0.0
Non-ambulatory b	No	−38.1	15.6	−18.1	0.246	−35.8	10.2	−9.6	0.376
	Yes	−20.0	7.7	0.0		−26.3	4.4	0.0
Total	No	−65.4	18.6	−30.5	0.104	−62.4	12.4	−24.0	0.070
	Yes	−34.9	9.1	0.0		−38.5	5.3	0.0
Total b	No	−64.7	18.8	−30.6	0.105	−62.4	12.5	−24.0	0.071
	Yes	−34.1	9.3	0.0		−38.4	5.3	0.0
ΔMVPA (min/day) Ambulatory	No	−8.5	4.7	−4.4	0.346	−9.2	2.4	−2.6	0.297
	Yes	−4.1	2.3	0.0		−6.6	1.0	0.0
Ambulatory b	No	−8.8	4.7	−4.4	0.355	−9.4	2.3	−2.9	0.242
	Yes	−4.5	2.4	0.0		−6.5	1.0	0.0
Non-ambulatory	No	−5.4	2.5	−5.1	0.041	−3.9	1.6	−1.9	0.261
	Yes	−0.2	1.3	0.0		−2.1	0.7	0.0
Non-ambulatory b	No	−5.4	2.5	−5.0	0.047	−4.1	1.6	−2.1	0.206
	Yes	−0.4	1.3	0.0		−2.0	0.7	0.0
Total	No	−13.6	6.2	−9.4	0.130	−13.2	3.2	−4.5	0.188
	Yes	−4.2	3.2	0.0		−8.7	1.4	0.0
Total b	No	−13.9	6.2	−9.3	0.133	−13.7	3.1	−5.3	0.117
	Yes	−4.6	3.2	0.0		−8.5	1.4	0.0
ΔMPA (min/day) Ambulatory	No	−6.6	4.0	−3.7	0.354	−6.8	2.2	−1.9	0.413
	Yes	−2.9	2.0	0.0		−4.9	1.0	0.0
Ambulatory b	No	−6.8	4.1	−3.7	0.360	−7.0	2.2	−2.2	0.349
	Yes	−3.1	2.0	0.0		−4.9	0.9	0.0
Non-ambulatory	No	−4.8	2.4	−4.6	0.057	−3.3	1.5	−1.3	0.402
	Yes	−0.2	1.2	0.0		−2.0	0.6	0.0
Non-ambulatory b	No	−4.8	2.4	−4.5	0.064	−3.5	1.5	−1.6	0.331
	Yes	−0.3	1.2	0.0		−2.0	0.6	0.0
Total	No	−11.7	5.4	−8.6	0.113	−10.0	2.9	−3.3	0.293
	Yes	−3.1	2.7	0.0		−6.7	1.3	0.0
Total b	No	−11.9	5.4	−8.5	0.116	−10.6	2.9	−4.0	0.190
	Yes	−3.3	2.8	0.0		−6.5	1.2	0.0
ΔStep count (steps/day)	No	−2912	1010	−1666	0.100	−2885	592	−1377	0.029
	Yes	−1246	492	0		−1508	257	0

Abbreviations: LPA light physical activity, MVPA moderate-to-vigorous physical activity, MPA moderate physical activity, SE standard error, Δ change, Δvariables were calculated as follow-up values minus baseline values

^a except for physical education in the school period, adjusted for school, follow-up periods, age and sedentary behavior or physical activity at baseline

^b adjusted for sedentary behavior or moderate-to-vigorous physical activity at baseline