Concurrent Associations between Physical Activity, Screen Time, and Sleep Duration with Childhood Obesity
Table 1
Descriptive statistics for boys and girls by weight status.
Variable
Boys
Girls
Normal weight
Overweight and obese
Normal weight
Overweight and obese
()
()
()
()
Age (years)
9.7 (0.9)
9.6 (0.9)
9.6 (0.9)
9.7 (1.0)
Height (cm)
137.6 (7.1)
140.6 (7.1)*
136.5 (7.9)
141.1 (8.0)*
Leg length (cm)
65.4 (4.5)
66.3 (4.3)
65.2 (4.7)
66.5 (5.1)*
Weight (kg)
31.6 (4.6)
42.8 (8.6)*
30.8 (5.2)
45.2 (9.7)*
BMI (kg/m2)
16.6 (1.2)
21.5 (2.9)*
16.4 (1.5)
22.5 (3.0)*
Pedometer (steps/day)
13,382 (3,383)
11,647 (2,947)*
11,360 (2,461)
9,930 (2,550)*
Sleep duration (hours/day)
10.1 (1.0)
9.7 (1.0)*
10.3 (0.9)
10.1 (0.9)*
Screen time (hours/day)
4.2 (3.1)
5.4 (3.6)*
3.2 (2.3)
4.1 (2.9)*
Combined z-score
0.39 (1.7)
ā0.83 (1.8)*
0.40 (1.6)
ā0.78 (1.9)*
All values are mean SD.
*Overweight/obese significantly different from normal weight of same gender (). Combined z-score = sum of age and gender specific -scores from pedometer steps, sleep, and (inverse of) screen time.
