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Table 3 Characteristics of the children in the obese group

From: Screen time duration and timing: effects on obesity, physical activity, dry eyes, and learning ability in elementary school children

  

BMI percentiles

Rohrer index

Item

  

Normal

Obese

  

Normal

Obese

 

Age, mean (SE)

  

9.04

(0.023)

9.21

(0.063)

  

8.76

(0.023)

8.99

(0.069)

 
  

N

n

%

N

%

P-valuea

N

N

%

N

%

P-valuea

Gender

Boys

3346

2882

86.1

464

13.9

< 0.001

2582

2160

83.7

422

16.3

< 0.001

Girls

2988

2744

91.8

244

8.2

 

2101

1886

89.8

215

10.2

 

School year

1

1235

1126

91.2

109

8.8

0.021

1136

996

87.7

140

12.3

0.021

2

1161

1039

89.5

122

10.5

 

945

833

88.1

112

11.9

 

3

1106

978

88.4

128

11.6

 

813

708

87.1

105

12.9

 

4

1080

949

87.9

131

12.1

 

730

626

85.8

104

14.2

 

5

989

857

86.7

132

13.3

 

617

511

82.8

106

17.2

 

6

763

677

88.7

86

11.3

 

442

372

84.2

70

15.8

 
  1. aChi-square test