Table 1 Sample characteristics

Age^a

 7–9 years

800 (60.7)

705 (60.8)

 ≥ 10 years

517 (39.3)

455 (39.2)

School shift^a

 Morning

680 (51.6)

593 (51.1)

 Afternoon

637 (48.4)

567 (48.9)

Socioeconomic status (n = 525)^a

 A

8 (1.5)

2 (0.4)

 B-C

349 (66.5)

291 (65.1)

 D-E

168 (32)

154 (34.4)

Weekly attendance in Physical Education classes (n = 2,217)^a

 None

130 (11.1)

87 (8.3)

 One day

689 (58.9)

566 (54.1)

 ≥ two days

351 (30)

394 (37.6)

Physical Activity^b

 Active play

9.78 (10.5)

13.60 (11.6)

 Non-active play

0.70 (1.3)

0.94 (1.5)

 Strutuctured PA

1.17 (3.0)

1.54 (4.3)

 Household chore

1.80 (2.8)

0.74 (1.9)

Sedentary behavior^b

 Use eletronic devices

2.15 (2.0)

2.43 (2.4)

 Academic tasks

1.02 (1.0)

0.71 (0.9)