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Table 3 Crude and Adjusted Prevalence Ratio (PR) of history of involvement in fights with firearm and/or cold weapon among 9th grade students attending public and private schools in Brazil, 2012

From: Involvement of school students in fights with weapons: prevalence and associated factors in Brazil

  Sex
Male Female
Variables crude PR
95 % CI
p adjusted PR*
95 % CI
p crude PR
95 % CI
p adjusted PR*
95 % CI
p
Sociodemographic characteristics
 Age group   <0.001   <0.001   <0.001   <0.001
  ≥14 years 1   1   1   1  
  15 or over 1.56 (1.46-1.68)   1.17 (1.09-1.25)   1.58 (1.44-1.74)   1.20 (1.09-1.32)  
 Ethnicity/skin color   <0.001   0.056   <0.001   0.012
  White    1   1   1  
  Black 1.26 (1.14-1.39)   1.09 (0.99-1.20)   1.33 (1.14-1.56)   1.19(1.02-1.39)  
  Yellow 1.12 (0.93-1.34)   0.90 (0.76-1.07)   1.16 (0.93-1.45)   1.11 (0.89-1.38)  
  Brown 0.98 (0.91-1.06)   0.97 (0.89-1.04)   1.11 (1.00-1.24)   1.10 (0.99-1.22)  
  Indigenous 1.27 (1.07-1.50)   1.10 (0.94-1.29)   1.74 (1.39-2.17)   1.44 (1.15-1.80)  
 Type of school   <0.001     <0.001   
  Private 1   -   1   -  
  Public 1.18 (1.08-1.30)   -   1.42 (1.23-1.64)   -  
 Employment   <0.001   <0.001   <0.001   <0.001
  No 1   1   1   1  
  Yes 1.91 (1.77-2.05)   1.32 (1.22-1.42)   1.96 (1.74-2.20)   1.35 (1.20-1.52)  
Health-risk behaviors
 Cigarette smoking in the previous 30 days   <0.001   <0.001   <0.001   <0.001
  No 1   1   1   1  
  Yes 3.74 (3.46-4.04)   1.41 (1.27-1.57)   4.00 (3.56-4.50)   1.58 (1.36-1.84)  
 Alcohol intake in the previous 30 days   <0.001   <0.001   <0.001   <0.001
  No 1   1   1   1  
  Yes 3.00 (2.80-3.20)   2.07 (1.92-2.24)   2.72 (2.48-2.98)   1.77(1.60-1.97)  
 Use of illicit drugs   <0.001   <0.001   <0.001   <0.001
  No 1   1   1   1  
  Yes 4.74 (4.39-5.12)   1.66(1.48-1.86)   5.08 (4.40-5.87)   1.70(1.43-2.03)  
Mental Health
 Insomnia   <0.001   <0.001   <0.001   <0.001
  No 1   1   1   1  
  Yes 1.87 (1.68-2.07)   1.23 (1.11-1.36)   2.10 (1.89-2.34)   1.37 (1.22-1.53)  
 Close friends   <0.001   <0.001   <0.001   0.011
  One or more 1   1   1   1  
  None 1.81 (1.60-2.05)   1.45 (1.28-1.64)   1.70 (1.35-2.14)   1.36(1.07-1.72)  
Parental supervision
 Living with mother and/or father   <0.001       
  Yes 1   -   1   1  
  No 1.38 (1.22-1.57)   -   1.65 (1.42-1.92)   1.29 (1.11-1.50)  
 Skipping classes without permission   <0.001   <0.001   <0.001   <0.001
  No 1   1   1   1  
  Yes 1.92(1.79-2.06)   1.30 (1.20-1.39)   2.32 (2.11-2.55)   1.46 (1.31-1.61)  
Context of violence
 Suffering family violence   <0.001   <0.001   <0.001   <0.001
  No 1   1   1   1  
  Yes 2.72 (2.51-2.94)   1.62 (1.49-1.76)   2.84 (2.57-3.14)   1.72 (1.54-1.93)  
 Suffering bullying   <0.001     <0.001   <0.001
  No 1   -   1   1  
  Yes 1.37 (1.23-1.53)   -   2.21 (1.92-2.54)   1.55 (1.34-1.79)  
 Unsafe on the way to and from and/or at school   <0.001   <0.001   <0.001   <0.001
  No 1   1   1   1  
  Yes 2.49 (2.31-2.68)   1.50 (1.38-1.63)   2.35 (2.11-2.62)   1.36 (1.21-1.54)  
  1. crude PR crude prevalence ratio; adjusted, PR adjusted prevalence ratio, 95 % CI 95 % confidence interval