Table 2.

Between-person comparison of physical activity outcomes by segmented and total day among BOKS program vs. control participants in Massachusetts and Rhode Island, Fall 2016^a.

Days when BOKS before school programming was offered (n = 647)
Outcome	Before schoolb				During schoolc				Total day
	Unadjusted mean (SD)	Adjusted mean (SE)d	Mean difference (95% CI)	P valuee	Unadjusted mean (SD)	Adjusted mean (SE)d	Mean difference (95% CI)	P valuee	Unadjusted mean (SD)	Adjusted mean (SE)d	Mean difference (95% CI)	P valuee
Steps
BOKS	3190 (1317)	3217 (113)	1503 (1286, 1719)	<0.001	4061 (1624)	4037 (227)	78 (−141, 297)	0.48	11,571 (4017)	11,584 (545)	1147 (583, 1712)	<0.001
Control	1685 (1005)	1714 (121)			3856 (1428)	3958 (232)			10,387 (4259)	10,437 (557)
MVPA minutes
BOKS	15.3 (15.6)	15.5 (1.0)	13.4 (11.3, 15.5)	<0.001	12.0 (17.1)	11.6 (1.9)	2.0 (−0.7, 4.7)	0.15	43.7 (48.8)	42.7 (8.0)	13.4 (6.6, 20.3)	<0.001
Control	2.4 (6.3)	2.2 (1.1)			9.7 (13.6)	9.6 (2.0)			31.3 (44.1)	29.3 (8.1)
VPA minutes
BOKS	4.9 (7.2)	5.0 (0.4)	4.5 (3.6, 5.5)	<0.001	3.1 (6.3)	3.0 (0.7)	0.7 (−0.2, 1.7)	0.14	12.6 (19.4)	12.3 (3.0)	4.0 (1.2, 6.7)	0.005
Control	0.6 (2.1)	0.5 (0.4)			2.3 (4.9)	2.2 (0.7)			9.0 (18.7)	8.3 (3.0)
Total PA minutesf
BOKS	90.1 (36.6)	90.4 (3.3)	24.1 (17.3, 30.9)	<0.001	169.5 (55.4)	168.4 (5.8)	4.8 (−3.4, 12.9)	0.25	420.3 (117.0)	419.8 (9.8)	15.9 (0.0, 31.9)	0.05
Control	64.2 (34.0)	66.3 (3.6)			158.5 (53.6)	163.7 (6.0)			397.3 (118.8)	403.8 (10.4)

All school days monitored (n = 1371)
Outcome	Before Schoolb				During Schoolc				Total Day
	Unadjusted mean (SD)	Adjusted mean (SE)d	Mean difference (95% CI)	P valuee	Unadjusted mean (SD)	Adjusted mean (SE)d	Mean difference (95% CI)	P valuee	Unadjusted mean (SD)	Adjusted mean (SE)d	Mean difference (95% CI)	P valuee
Steps
BOKS	2426 (1361)	2452 (121)	756 (580, 932)	<0.001	4345 (1766)	4356 (187)	59 (−141, 260)	0.56	10,653 (4316)	10,734 (449)	716 (228, 1204)	0.004
Control	1673 (975)	1696 (126)			4276 (1765)	4297 (191)			10,066 (4268)	10,018 (460)
MVPA minutes
BOKS	8.7 (13.2)	8.9 (0.5)	6.2 (4.9, 7.4)	<0.001	12.1 (18.2)	12.2 (1.6)	−1.1 (−3.5, 1.3)	0.39	34.2 (43.0)	34.5 (5.6)	4.7 (−0.7, 10.1)	0.09
Control	2.8 (7.2)	2.7 (0.6)			13.6 (18.6)	13.2 (1.7)			31.2 (42.2)	29.8 (5.7)
VPA minutes
BOKS	2.7 (5.7)	2.8 (0.2)	2.2 (1.6, 2.7)	<0.001	3.1 (7.0)	3.2 (0.6)	−0.1 (−1.0, 0.8)	0.79	9.2 (16.6)	9.4 (2.1)	1.1 (−1.0, 3.2)	0.30
Control	0.6 (2.6)	0.6 (0.2)			3.4 (7.3)	3.3 (0.7)			8.7 (17.8)	8.3 (2.2)
Total PA minutesf
BOKS	77.5 (35.9)	77.7 (3.5)	12.0 (6.3, 17.8)	<0.001	174.4 (53.0)	173.4 (4.1)	0.4 (−7.1, 7.9)	0.92	394.8 (123.3)	395.7 (7.6)	6.4 (−7.5, 20.2)	0.37
Control	64.7 (32.3)	65.7 (3.6)			170.3 (55.2)	173.0 (4.4)			386.7 (128.0)	389.3 (8.1)

Abbreviations: BOKS, Build Our Kids' Success; SE, standard error; CI, confidence interval, MVPA, moderate-to-vigorous physical activity; VPA, vigorous physical activity; PA, physical activity.

^aBetween-person comparisons were assessed using multivariable linear mixed-effects regression models. All models are adjusted for age, gender, and daily monitor wear hours and account for repeated days of observation within children and clustering of children within schools.

^bThe Before School period was defined as 12:00 am to (but not including) school start time. School start times were 8:15 am at 1 school, 8:45 am at 3 schools, and 9:20 am at 3 schools.

^cThe During School period was defined as school start time to (but not including) school end time. School hours were 8:45 am to 2:45 pm at 3 schools, 9:20 am to 3:15 pm at 3 schools, and 8:15 am to 2:45 pm at 1 school.

^dAdjusted means represent mean activity levels for a child wearing the monitor for the mean daily wear time.

^eBoldface indicates statistical significance (p < 0.05).

^fTotal PA minutes include minutes engaged in light, moderate, or vigorous activity.