Table 1.

Baseline characteristics of Cambridge students, by gender, weight status, and fitness level

		Girls					Boys
	All students	All girls	Overweight/obese		Underfit		All boys	Overweight/obese		Underfit
			N	%	N	%		N	%	N	%
Overall	2,793	1,337	491	36.7	881	65.9	1,456	578	39.7	1,001	68.8
Ethnicity
White	987	461	128	27.8	279	60.5	526	160	30.4	349	66.3
Black	1,088	533	253	47.5	390	73.2	555	253	45.6	393	70.8
Asian	262	131	31	23.7	79	60.3	131	47	35.9	101	77.1
Latino	425	193	76	39.4	122	63.2	232	111	47.8	149	64.2
Other	31	19	3	15.8	11	57.9	12	7	58.3	9	75.0
Free lunch
Paid	1,517	728	228	31.3	448	61.5	789	267	33.8	530	67.2
Free/reduced	1,276	609	263	43.2	433	71.1	667	311	46.6	471	70.6
Grade at first test
1	431	223	57	25.6	132	59.2	208	67	32.2	135	64.9
2	418	187	56	29.9	112	59.9	231	96	41.6	155	67.1
3	407	183	73	39.9	126	68.9	224	96	42.9	148	66.1
4	337	165	70	42.4	104	63.0	172	62	36.0	122	70.9
5	399	197	81	41.1	139	70.6	202	84	41.6	144	71.3
6	379	179	69	38.5	114	63.7	200	77	38.5	147	73.5
7	422	203	85	41.9	154	75.9	219	96	43.8	150	68.5
Baseline weight status
Underweight	37	18			12	66.7	19			11	57.9
Healthy weight	1,687	828			469	56.6	859			515	60.0
Overweight	497	220	220		161	73.2	277	277		199	71.8
Obese	572	271	271		239	88.2	301	301		276	91.7
Baseline fitness tests passed
0	51	21	15	71.4	21		30	23	76.7	30
1	217	96	65	67.7	96		121	75	62.0	121
2	366	164	94	57.3	164		202	119	58.9	202
3	578	289	132	45.7	289		289	142	49.1	289
4	670	311	94	30.2	311		359	116	32.3	359
5	911	456	91	20.0			455	103	22.6
Baseline endurance scorea
Participation	1,274	551	313	56.8	551	100.0	723	402	55.6	723	100.0
Attainment	1,058	535	148	27.7	228	42.6	523	146	27.9	215	41.1
Outstanding	459	249	29	11.6	100	40.2	210	30	14.3	63	30.0
Baseline agility scorea
Participation	760	356	187	52.5	356	100.0	404	223	55.2	404	100.0
Attainment	897	509	185	36.3	297	58.3	388	150	38.7	268	69.1
Outstanding	1,129	467	116	24.8	223	47.8	662	204	30.8	327	49.4
Baseline flexibility scorea
Participation	599	347	129	37.2	347	100.0	252	95	37.7	252	100.0
Attainment	1,236	539	210	39.0	313	58.1	697	282	40.5	456	65.4
Outstanding	957	450	151	33.6	220	48.9	507	201	39.6	293	57.8
Baseline abdominal strength scorea
Participation	298	88	48	54.5	87	98.9	210	114	54.3	210	100.0
Attainment	796	372	169	45.4	255	68.5	424	191	45.0	296	69.8
Outstanding	1,697	875	273	31.2	529	60.5	822	273	33.2	495	60.2
Baseline upper body strength scorea
Participation	827	373	239	64.1	373	100.0	454	291	64.1	454	100.0
Attainment	1,005	454	161	35.5	274	60.4	551	195	35.4	361	65.5
Outstanding	960	509	90	17.7	233	45.8	451	92	20.4	186	41.2
Years of follow-up
1	865	425	166	39.1	306	72.0	440	187	42.5	315	71.6
2	546	255	95	37.3	165	64.7	291	114	39.2	212	72.9
3	479	210	81	38.6	142	67.6	269	114	42.4	191	71.0
4	903	447	149	33.3	268	60.0	456	163	35.7	283	62.1

Weight status: underweight, <5th BMI percentile; healthy weight, ≥5th and <85th BMI percentile; overweight, ≥85th and <95th percentile; obese, ≥95th percentile. Underfit is defined as failing at least one of the five physical fitness tests.

^aSample sizes vary slightly due to missing data.