Table 2 Comparison of all children observed on schoolyards at LL and control schools during different utilization periods, reported as number of children per 100 children enrolled in the school

All children

14.5

9.8

4.6

1.7

**.008

Boys

7.7

5.3

2.4

1.1

*.023

Girls

6.8

4.5

2.3

0.8

**.008

Before School

All children

22.3

10.8

11.5

6.0

.066

Boys

12.7

6.4

6.3

3.7

.106

Girls

9.6

4.4

5.3

2.4

*.040

Lunch Recess

All children

27.4

20.8

6.6

2.4

**.007

Boys

14.4

10.9

2.8

1.3

**.007

Girls

13.0

9.9

3.1

1.3

*.016

After School

All children

4.2

2.1

2.1

0.8

*.007

Boys

2.0

1.2

0.8

0.4

.065

Girls

2.2

0.8

1.3

0.3

**.001

Weekends

All children

0.8

0.2

0.6

0.3

*.068

Boys

0.5

0.1

0.4

0.2

*.025

Girls

0.2

0.1

0.2

0.1

.083