Table 1

Characteristics of the study population of United States High School students in the Youth Risk Behavior Survey 2005

Characteristics
Total
Males
Females

Ethnicity



Age (years)
n (%)
n (%)
n (%)
All
13857 (100)
7193 (51.9)
6664 (48.1)
     ≤ 14
1221 (8.8)
701 (9.8)
520 (7.8)
     15
3170 (23.9)
1720 (23.9)
1450 (21.6)
     16
3535 (25.5)
1817 (25.3)
1718 (25.8)
     17
3661 (26.4)
1881 (26.2)
1780 (26.7)
     18+
2270 (16.4)
1074 (14.8)
1196 (18.0)
Ethnicity



     White
6117 (50.5)
3015 (51.7)
3102 (49.3)
     American Indian or Alaska Native
144 (1.2)
86 (1.6)
58 (0.9)
     Asian
366 (3.1)
366 (3.2)
179 (2.8)
     Blacks
3343 (27.6)
1574 (27.0)
1768 (28.1)
     Native Hawaii or other Pacific Islander
90 (0.7)
44 (0.7)
46 (0.7)
     Hispanics
2063 (17.3)
920 (15.8)
1143 (18.2)
Cigarette smoking in the last 30 days



     No
10374 (77.0)
4808 (77.0)
5566 (77.0)
     Yes
2856 (23.0)
1490 (23.0)
1366 (23.0)
Alcohol use in the last 30 days



     No
7434 (56.7)
3428 (56.2)
4006 (57.2)
     Yes
5751 (43.3)
2841 (43.8)
2910 (42.8)
Ever used illegal drugs



     No
7225 (54.0)
3212 (54.3)
4013 (57.8)
     Yes
6228 (46.0)
3210 (45.7)
3018 (42.2)
Property stolen or deliberately damaged on school property in the last 12 months



     No
9699 (70.3)
4538 (68.6)
5161 (72.0)
     Yes
41.32 (29.7)
2105 (31.4)
2027 (28.0)
Threatened or injured with a weapon on school property in the last 12 months



     No
12755 (92.1)
6000 (90.0
6755 (93.9)
     Yes
1083 (7.9)
649 (10.0)
434 (6.1)
Videogame (hours/school day)



     ≤ 2 hours
2385 (18.4)
1521 (23.7)
864 (12.9)
     3+ hours
11472 (81.7)
5143 (76.3)
6329 (87.1)
Physical fighting on school property in the last 12 months



     No
11868 (86.5)
5391 (82.1)
6477 (91.2)
     Yes
1838(13.5)
1178 (17.9)
660 (8.8)

Rudatsikira et al. Clinical Practice and Epidemiology in Mental Health 2008 4:16   doi:10.1186/1745-0179-4-16