Social support, physical activity and sedentary behavior among 6th-grade girls: a cross-sectional study

Table 1 Descriptive characteristics and aggregate mean scores of daily minutes of physical activity and sedentary behaviors among female middle school students, IMPACT Baseline Study, 2001 (n = 718)

Descriptor	Total Sample		Moderate-Vigorous PA min.		Vigorous PA min.		TV-video viewing min.		Computer-video game playing min.		Combined sedentary min.^c
	n	%	mean	SD	mean	SD	mean	SD	mean	SD	mean	SD
Total Sample	718	100	65.8	57.8	17.6	34.1	102.4	86.8	22.4	36.2	124.8	98.3
Ethnicity
White (non-Hispanic)	515	71.8	68.8	54.2	15.7	29.5	96.0	83.8	21.0	32.4	117.0	94.2
Hispanic	83	11.6	75.6	63.3	22.3	36.2	127.5	87.3	18.2	40.8	145.7	95.7
Other^a	119	16.6	68.0	60.4	22.9	40.1	113.7	95.1	31.0	46.4	144.7	112.5
			p = .607		p = .042		p = .003		p = .014		p = .003
BMI-for-age percentiles^b
5th percentile	28	3.9	51.9	41.5	11.1	22.6	84.1	83.7	21.5	28.9	105.6	89.8
>5th to <85th percentile	510	71.0	71.6	57.9	17.3	32.1	97.0	84.1	20.5	33.5	117.5	95.4
85th to <95th percentile	105	14.6	67.2	53.9	17.5	29.1	105.2	79.1	22.6	41.3	127.8	89.6
95th percentile	74	10.3	63.9	53.0	22.6	40.9	140.2	104.8	34.3	46.1	174.5	115.5
			p = .247		p = .424		p = .001		p = .025		p < .001

Abbreviations: PA, physical activity; min., minutes; SD, standard deviation,
^aIncludes African American (n = 39), Asian/Pacific Islander (n = 26), Native American (n = 7), and other (n = 47)
^bCalculations and classifications based on National Center for Health Statistics and National Center for Chronic Disease Prevention and Health Promotion growth charts, with 5th percentile = underweight; >5th to <85th percentile = normal weight; 85th to <95th percentile = at risk for overweight; and 95th percentile = overweight
^cCombined Sedentary Behavior is the sum of daily T.V.-video viewing minutes and daily computer-video game playing minutes

ISSN: 1479-5868