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Table 3 Violence index by city YRBS weighted data for freshman and sophomores from 2007 to 2013

From: Gun carrying among freshmen and sophomores in Chicago, New York City and Los Angeles public schools: the Youth Risk Behavior Survey, 2007-2013

Violence Index Variables

Chicago

N = 198,422

New York City

N = 582,802

Los Angeles

N = 356,225

Carried any weapon in the last 30 days**

21.11%

12.48%

14.95%

Carried gun in the last 30 days**

8.89%

4.09%

6.03%

Carried any weapon to school in the last 30 days*

7.94%

5.65%

5.82%

Feeling unsafe at school in last 30 days*

12.67%

9.53%

9.05%

Threatened or injured at school in last 12 months**

13.40%

7.56%

10.40%

In physical fight in last 12 months**

46.70%

35.94%

36.70%

In physical fight at school in last 12 months**

25.26%

17.07%

20.48%

Bullied at school in last 12 months*

13.07%

13.98%

16.81%

Electronically bullied in last 12 months

10.38%

11.72%

10.59%

Risk Category

 No violence (0 violence index variables)**

31.75%

25.66%

49.36%

 Low violence (1-3 violence index variables)**

57.01%

43.25%

57.39%

 High violence (4 or more violence index variables)**

11.24%

8.18%

8.47%

  1. *p < 0.05
  2. **p < 0.001