Table 2 Results of bivariate stratified analysis on the association between physical fighting on school property and selected characteristics among US High School students, 2005

Age (years)

   ≤ 14

1.00

1.00

1.00

   15

1.09 [0.86, 1.37]

1.31 [0.96, 1.78]

0.79 [0.55, 1.14]

   16

0.92 [0.73, 1.16]

0.99 [0.73, 1.35]

0.71 [0.49, 1.04]

   17

0.59 [0.46, 0.75]

0.70 [0.51, 0.96]

0.40 [0.27, 0.59]

   18+

0.61 [0.46, 0.80]

0.64 [0.45, 0.91]

0.46 [0.29, 0.75]

Gender

   Females

1.00

   Males

2.31 [2.01, 2.64]

-

-

Ethnicity

   White

1.00

1.00

1.00

   American Indian or Alaska Native

2.15 [1.34, 3.43]

2.49 [1.44, 4.31]

1.83 [0.70, 4.77]

   Asians

0.68 [0.38, 1.08]

0.68 [0.34, 1.12]

0.68 [0.39, 1.19]

   Blacks

1.54 [1.32, 1.80]

1.30 [1.06, 1.59]

2.19 [1.69, 2.83]

   Native Hawaii or other Pacific Islander

2.46 [1.26, 4.82]

3.17 [1.28, 7.86]

2.42 [0.90, 6.46]

   Hispanics

1.53 [1.27, 1.84]

1.46 [1.15, 1.85]

1.80 [1.32, 2.45]

Cigarette smoking in the last 30 days

   No

1.00

1.00

1.00

   Yes

2.52 [2.19, 2.91]

2.38 [1.99, 2.86]

2.95 [2.32, 3.74]

Alcohol use in the last 30 days

   No

1.00

1.00

1.00

   Yes

2.12 [1.85, 2.44]

2.24 [1.88, 2.66]

1.98 [1.58, 2.49]

Ever used illegal drugs

   No

1.00

1.00

1.00

   Yes

2.72 [2.37, 3.13]

2.44 [2.04, 2.90]

3.33 [2.62, 4.24]

Property stolen or deliberately damaged on school property in the last 12 months

   No

1.00

1.00

1.00

   Yes

2.51 [2.20, 2.86]

2.30 [1.95, 2.72]

2.85 [2.28, 3.57]

Threatened or injured with a weapon on school property in the last 12 months

   No

1.00

1.00

1.00

   Yes

4.68 [3.74, 5.84]

4.72 [3.96, 5.63]

4.22 [3.15, 5.64]

Videogame (hours/school day)

   ≤ 2

1.00

1.00

1.00

   3+

1.44 [1.20, 1.87]

1.60 [1.37, 1.87]

1.31 [0.97, 1.77]