Table 2.

Study Variables by Grade and Gender

Variable	All			Male			Female
	N	M	SD	N	M	SD	N	M	SD
BMIa	678	17.43	3.12	336	17.45	2.99	342	17.41	3.26
PAb	402	561.23	181.76	186	597.57	188.70	216	529.94	169.85
PACERc laps	685	16.47	8.91	339	18.26	10.12	346	14.73	7.13
Reading	669	100.58	14.81	329	100.35	15.63	340	100.79	13.99
Spelling	681	99.64	12.94	338	98.93	14.88	343	100.34	10.67
Math	680	103.02	13.38	337	104.26	15.02	343	101.80	11.44

Grade 2	All			Male			Female
	N	M	SD	N	M	SD	N	M	SD
BMI	334	17.16	3.00	172	17.01	2.59	162	17.33	3.37
PA	201	578.75	180.42	91	615.58	191.80	110	548.28	165.17
PACER laps	336	14.62	7.04	172	15.83	7.87	164	13.36	5.80
Reading	321	100.01	14.47	162	99.74	14.30	159	100.28	14.68
Spelling	330	98.49	12.48	169	97.88	13.43	161	99.14	11.40
Math	330	102.73	12.51	169	104.36	13.53	161	101.02	11.13

Grade 3	All			Male			Female
	N	M	SD	N	M	SD	N	M	SD
BMI	344	17.69	3.23	164	17.91	3.30	180	17.48	3.16
PA	201	543.71	181.85	95	580.31	185.05	106	510.91	173.31
PACER laps	349	18.26	10.09	167	20.76	11.49	182	15.96	7.97
Reading	348	101.10	15.12	167	100.95	16.85	181	101.24	13.37
Spelling	351	100.72	13.29	169	99.99	16.17	182	101.40	9.90
Math	350	103.29	14.17	168	104.16	16.42	182	102.48	11.70

^aBody Mass Index,

^bPhysical activity counts per minute measured by accelerometer,

^cProgressive Aerobic Cardiovascular Endurance Run.

Note. Baseline data collected in fall of 2011 on 2^nd and 3^rd grade students from 17 schools in the Midwest.