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Table 1 Descriptive statistics for youth in grades 1 to 4 by sex in PLAY-On (Ontario, Canada, 2007–2008)

From: A cross-sectional examination of school characteristics associated with overweight and obesity among grade 1 to 4 students

   Male (n = 1,187) Female (n = 1,139) Chi-square
Student-level characteristics   % (n)a % (n)a  
Weight status1,b Normal weight 75.0 (890) 74.5 (848) χ2 = 0.09, df = 3 , p = 0.99
Overweight 13.7 (162) 14.0 (159)  
Obese 6.1 (144) 6.2 (71)  
Missing 5.2 (62) 5.4 (61)  
Grade1 1 22.7 (270) 22.4 (256) χ2 = 0.32, df = 3, p = 0.95
2 21.5 (255) 21.1 (241)  
3 27.5 (326) 27.1 (309)  
4 28.3 (336) 29.4 (335)  
Physical activity level2 Low active 10.0 (115) 14.3 (158) χ2 = 11.41, df = 2, p < 0.01
Moderately active 63.3 (726) 62.7 (695)  
Very active 26.7 (306) 23.0 (255)  
Sedentary behaviour2 ≤2 hour per day 70.6 (810) 75.2 (834) χ2 = 6.37, df = 2, p < 0.05
2 to 4 hours per day 21.8 (250) 18.9 (210)  
>4 hours per day 7.6 (87) 5.9 (65)  
Physical activity level compared to other kids3 More active 7.4 (86) 9.3 (105) χ2 = 34.56, df = 2, p < 0.001
About the same 28.5 (333) 18.2 (206)  
Less active 64.2 (750) 72.5 (822)  
Prefers to play alone or with other children3 Alone 2.4 (28) 1.0 (11) χ2 = 9.24, df = 2, p < 0.01
Both 57.1 (667) 54.8 (621)  
Other children 40.5 (474) 44.2 (501)  
Prefers to play active games or quiet games3 Active 4.5 (52) 7.6 (86) χ2 = 16.40, df = 2, p < 0.001
Both 41.4 (484) 35.1 (398)  
Quiet 54.1 (633) 57.3 (649)  
Preference for playing sports3 Likes sports 96.5 (1,127) 92.7 (1,049) χ2 = 16.46, df = 1, p < 0.001
Dislikes sports 3.5 (41) 7.3 (83)  
Preference for reading3 Likes reading 79.6 (931) 89.5 (1,014) χ2 = 42.66, df = 1, p < 0.001
Dislikes reading 20.4 (238) 10.5 (119)  
Prefers to play outside or inside3 Outside 4.1 (48) 4.2 (48) χ2 = 4.35, df = 2, p = 0.11
Both 20.6 (241) 17.2 (195)  
  Inside 75.3 (880) 78.6 (890)  
  1. aNumbers may not add to total because of missing values.
  2. bBody mass index (BMI) values used to determine weight status have been adjusted for age and sex.
  3. 1Measured by PLAY-On nurse.
  4. 2Reported by parent or guardian.
  5. 3Reported by student and recorded by PLAY-On nurse.
  6. PLAY-On represents the name of the study where self-reported data were collected in 2007–2008 from a convenience sample of students in grades 1 to 4 attending 30 elementary schools in Ontario, Canada.