Table 2 Descriptive statistics of duration of time spent by high school students on selected activities and their daily energy expenditure (DEE)

Sleeping (hours/day)

8.16 ± 1.27*

7.73 ± 1.22

<0.001^**

Screen time viewing (hours/week)

10.44 ± 6.5

12.87 ± 6.35

<0.001^**

-Watching TV (hours/week)

7.39 ± 4.45

8.36 ± 4.14

0.015^**

-Videogames/Internet (hours/week)

1.5(0.5-3.8)

3.5(1.0-6.4)

<0.001^**

Listening to music/reading (hours/week)

9.62 ± 6.49

8.58 ± 6.62

0.087

Sport (hours/week)

1.0(0–2.3)

3.0(1.0-5.0)

<0.001^**

Screen time viewing (hours/week)

15.87 ± 7.63

17.95 ± 7.32

0.003^**

-Watching TV (hours/week)

10.5(6.0-14.0)

10.5(7.0-14.0)

0.789

-Videogames/Internet (hours/week)

6.26 ± 5.11

8.18 ± 4.96

<0.001^**

Listening to music/reading (hours/week)

13.02 ± 6.65

8.86 ± 6.48

<0.001^**

Sport (hours/week)

3.74 ± 3.77

5.86 ± 4.30

<0.001^**

DEE during school period (kcal/day)

1853(1543–2252)

2280(1863–2880)

<0.001^**

DEE during vacation period (kcal/day)

1244(995–1660)

1594(1219–2199)

<0.001^**

DEE total year (kcal/day)

1660(1402–2061)

2113(1673–2710)

<0.001^**

DEE during school period per kg body weight (kcal/kg.day)

31.0(28.1-35.3)

31.8(28.2-40.9)

0.020^**

DEE during vacation period per kg body weight (kcal/kg.day)

20.8(17.8-26.1)

23.1(17.7-32.3)

0.037^**

DEE total year per kg body weight (kcal/kg.day)

28.0(25.1-32.6)

29.1(25.4-38.0)

0.003^**