Type of offense

% boys concerned

% girls concerned

Significance of the difference between gender groups

lifetime

last year

lifetime

last year

lifetime

last year

graffiti

13.2%

10.2%

8.3%

6.9%

P = .01

NS

vandalization

14.2%

11.5%

10.1%

8.3%

P = .002

NS

extortion

2.0%

1.7%

.7%

.4%

P = .015

P = .04

possession of a weapon

20.6%

16.5%

8.0%

5.3%

P < .0001

P < .0001

Group fighting

24.3%

18.3%

12.1%

9.5%

P < .0001

P < .0001

assault

3.4%

2.8%

1.1%

.8%

P = .004

P = .02

animal abuse

3.7%

2.5%

1.5%

1.0%

P = .02

NS