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Table 4 Poisson regression analysis of likelihood of being a gun-carrier using total violence count 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

  Incidence Rate Ratio
(95% Confidence Interval)
N = 1,137,449
Male 1.94 (1.73-2.18)
Female Reference
Freshman Reference
Sophomore 0.97 (0.85-1.09)
Chicago 1.60 (1.44-1.78)
Los Angeles 1.47 (1.26-1.72)
New York City Reference
African American 1.43 (1.14-1.78)
Hispanic 1.30 (1.08-1.57)
Other Race/Unknown 1.30 (1.07-1.58)
Non-Hispanic White Reference
Total Violence Count 1.74 (1.70-1.78)
Ever feel sad or hopeless in last 12 months 0.83 (0.75-0.92)
Ever considered suicide in last 12 months 0.80 (0.70-0.90)
Ever attempted suicide in last 12 months 1.10 (0.97-1.25)
Smoked cigarettes in the last 30 days 1.30 (1.15-1.47)
Drank alcohol in the last 30 days 1.74 (1.45-2.09)
Smoked marijuana in the last 30 days 1.19 (1.01-1.40)
Injected drugs ever 1.07 (0.94-1.20)
Greater than 2 sex partners in last 3 months 1.65 (1.44-1.90)