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. 2012 Jan 24;12:74. doi: 10.1186/1471-2458-12-74

Table 1.

Descriptive statistics for student respondents

Student Characteristic Females n = 10781[% (n)] Males N = 10973[% (n)] Chi-square/t-test (sex differences)
Grade
 9 27.3 (2938) 27.6 (3035) X2 = 1.14, p < 0.7670
 10 26.9 (2902) 26.4 (2890)
 11 23.2 (2499) 23.0 (2521)
 12 22.6 (2442) 23.0 (2527)
Body Mass Index (BMI)
 Underweight 1.3 (145) 1.7 (181) X2 = 77.07, p < .0001
 Healthy weight 80.6 (8685) 70.3 (7718)
 Overweight 13.3 (1433) 19.8 (2171)
 Obese 4.8 (518) 8.2 (903)
Mode of Transportation to School
 Active 16.8 (1816) 23.7 (2600) X2 = 178.87, p < .0001
 Mixed 24.6 (2650) 20.2 (2212)
 Inactive 58.6 (6315) 56.1 (6161)
Enrolled in school PE
 Yes 31.4 (3391) 38.0 (4163) X2 = 100.73, p < .0001
 No 68.6 (7390) 62.0 (6810)
Participates in school intramurals
 Yes 27.9 (3003) 38.2 (4193) X2 = 279.63, p < .0001
 No 72.1 (7778) 61.8 (6780)
Participates in school varsity teams
 Yes 37.5 (4043) 45.0 (4932) X2 = 124.86, p < .0001
 No 62.5 (6738) 55.0 (6041)
Participates in flexibility activities
 Less than 3 days per week 40.4 (4357) 48.7 (5341) X2 = 148.18, p < .0001
 At least 3 days per week 59.6 (6424) 51.3 (5632)
Participates in strength training
 Less than 3 days per week 36.6 (3948) 27.9 (3056) X2 = 191.68, p < .0001
 At least 3 days per week 63.4 (6833) 72.1 (7917)
Physical Activity Time*
 Average minutes of moderate to vigorous PA per day 134.7 (88.1) 166.8 (101.2) t = 24.9, p < .0001

*Mean (SD; Range) presented for continuous variable