Table 231.50.

Percentage distribution of students in grades 9-12, by number of days they reported carrying a weapon anywhere or on school property during the previous 30 days and selected student characteristics: 2011

[Standard errors appear in parentheses]
Student characteristic	Anywhere (including on school property)1											On school property2
	0 days		1 day			2 to 5 days			6 or more days			0 days		1 day			2 to 5 days			6 or more days
1	2		3			4			5			6		7			8			9
Total	83.4	(0.65)	3.5		(0.18)	5.6		(0.27)	7.5		(0.45)	94.6	(0.35)	1.6		(0.16)	1.4		(0.12)	2.4		(0.23)
Sex
Male	74.1	(1.07)	4.8		(0.23)	8.5		(0.46)	12.6		(0.82)	91.8	(0.59)	2.5		(0.26)	2.1		(0.21)	3.7		(0.39)
Female	93.2	(0.41)	2.1		(0.27)	2.6		(0.21)	2.2		(0.19)	97.7	(0.19)	0.7		(0.12)	0.6		(0.09)	1.0		(0.13)
Race/ethnicity3
White	83.0	(1.05)	3.2		(0.21)	5.9		(0.48)	8.0		(0.68)	94.9	(0.40)	1.6		(0.21)	1.3		(0.16)	2.3		(0.33)
Black	85.8	(0.85)	3.1		(0.41)	5.2		(0.46)	6.0		(0.56)	95.4	(0.67)	1.7		(0.46)	1.2		(0.26)	1.6		(0.34)
Hispanic	83.8	(0.82)	4.4		(0.44)	5.2		(0.50)	6.7		(0.48)	94.2	(0.70)	1.4		(0.20)	2.0		(0.32)	2.4		(0.46)
Asian	90.9	(1.57)	1.9		(0.54)	1.8	!	(0.78)	5.4		(1.57)	95.7	(1.66)	‡		(†)	‡		(†)	‡		(†)
Pacific Islander	79.3	(5.00)	3.0	!	(1.37)	7.6	!	(2.75)	10.1	!	(3.53)	89.1	(3.73)	6.5	!	(2.63)	‡		(†)	4.4	!	(1.89)
American Indian/Alaska Native	72.4	(2.41)	5.3		(0.91)	12.1		(1.52)	10.2		(1.23)	92.5	(1.62)	2.7		(0.68)	3.2	!	(1.23)	1.6		(0.48)
Two or more races	76.3	(2.58)	5.6		(1.18)	7.1		(1.32)	10.9		(1.92)	92.5	(1.87)	1.6	!	(0.52)	1.2	!	(0.42)	4.7	!	(1.81)
Grade
9th	82.7	(1.07)	4.3		(0.47)	6.5		(0.46)	6.5		(0.58)	95.2	(0.50)	1.8		(0.28)	1.3		(0.19)	1.8		(0.31)
10th	83.4	(0.89)	3.2		(0.36)	5.7		(0.50)	7.7		(0.62)	93.9	(0.72)	1.9		(0.41)	1.7		(0.25)	2.4		(0.39)
11th	83.8	(0.84)	3.3		(0.32)	5.5		(0.46)	7.5		(0.46)	95.3	(0.44)	1.3		(0.26)	1.2		(0.23)	2.2		(0.33)
12th	84.2	(0.90)	3.0		(0.36)	4.6		(0.40)	8.1		(0.84)	94.4	(0.51)	1.4		(0.31)	1.3		(0.24)	2.9		(0.40)

†Not applicable.

!Interpret data with caution. The coefficient of variation (CV) for this estimate is between 30 and 50 percent.

‡Reporting standards not met. Either there are too few cases for a reliable estimate or the coefficient of variation (CV) is 50 percent or greater.

1 The term "anywhere" is not used in the Youth Risk Behavior Survey (YRBS) questionnaire; students were simply asked how many days they carried a weapon during the past 30 days.

2 In the question asking students about carrying a weapon at school, "on school property" was not defined for survey respondents.

3 Race categories exclude persons of Hispanic ethnicity.

NOTE: Respondents were asked about carrying "a weapon such as a gun, knife, or club." Detail may not sum to totals because of rounding.

SOURCE: Centers for Disease Control and Prevention, Division of Adolescent and School Health, Youth Risk Behavior Surveillance System (YRBSS), 2011. (This table was prepared September 2013.)