From: Involvement of school students in fights with weapons: prevalence and associated factors in Brazil
 | Male | Female | Total | |||
---|---|---|---|---|---|---|
Variables | % | 95 % CI | % | 95 % CI | % | 95 % CI  |
Sociodemographic characteristics | ||||||
 Age group | ||||||
   ≥ 14 years | 11.47 | (10.91–12.04) | 6.20 | (5.84–6.58) | 8.54 | (8.22–8.87) |
  15 or over | 17.96 | (17.12–18.83) | 9.80 | (9.14–10.57) | 14.30 | (13.74–14.88) |
 Ethnicity/skin color | ||||||
  White | 13.20 | (12.45–13.98) | 6.39 | (5.88–6.94) | 9.81 | (9.35–10.29) |
  Black | 16.60 | (15.30–17.98) | 8.53 | (7.47–9.72) | 13.01 | (12.13–13.94) |
  Yellow | 14.75 | (12.34–17.54) | 7.40 | (6.00–9.08) | 10.62 | (9.27–12.15) |
  Brown | 12.95 | (12.25–13.69) | 7.12 | (6.65–7.63) | 9.66 | (9.25–10.09) |
  Indigenous | 16.78 | (14.30–19.59) | 11.11 | (9.01–13.62) | 13.83 | (12.18–15.67) |
 Type of school | ||||||
  Private | 12.01 | (11.01–13.08) | 5.31 | (4.64–6.07) | 8.61 | (8.00–9.26) |
  Public | 14.21 | (13.68–14.75) | 7.56 | (7.19–7.95) | 10.72 | (10.40–11.05) |
 Employment | ||||||
  No | 11.94 | (11.45–12.45) | 6.60 | (6.27–6.95) | 9.03 | (8.74–9.33) |
  Yes | 22.78 | (21.45–24.17) | 12.94 | (11.63–14.37) | 19.18 | (18.19–20.20) |
Health–risk behaviors | ||||||
 Cigarette smoking in the previous 30 days | ||||||
  No | 12.12 | (11.67–12.59) | 6.25 | (5.93–6.57) | 9.05 | (8.78–9.33) |
  Yes | 45.34 | (42.31–48.40) | 25.00 | (22.47–27.71) | 34.83 | (32.80–36.93) |
 Alcohol intake in the previous 30 days | ||||||
  No | 9.18 | (8.73–9.65) | 4.92 | (4.59–5.26) | 6.98 | (6.70–7.27) |
  Yes | 27.51 | (26.30–28.77) | 13.38 | (12.56–14.24) | 19.91 | (19.18–20.66) |
 Use of illicit drugs | ||||||
  No | 12.5 | (12.01–12.94) | 6.64 | (6.32–6.70) | 9.41 | (9.10–9.69) |
  Yes | 59.1 | (55.13–63.00) | 33.70 | (29.30–38.41) | 48.60 | (44.93–51.19) |
Mental Health | ||||||
 Insomnia | ||||||
  No | 13.07 | (12.59–13.56) | 6.30 | (5.97–6.64) | 9.65 | (9.36–9.95) |
  Yes | 24.38 | (22.10–26.82) | 13.24 | (12.05–14.53) | 16.71 | (15.60–17.87) |
 Close friends | ||||||
  One or more | 13.29 | (12.82–13.78) | 7.05 | (6.72–7.39) | 10.00 | (9.71–10.29) |
  None | 24.03 | (21.27–27.03) | 11.97 | (9.51–14.95) | 19.53 | (17.53–21.70) |
Parental supervision | ||||||
 Living with father and/or mother | ||||||
  Yes | 13.58 | (13.11–14.08) | 6.91 | (6.58–7.26) | 10.13 | (9.84–10.43) |
  No | 18.78 | (16.57–21.21) | 11.40 | (9.88–13.11) | 14.43 | (13.13–15.83) |
 Skipping classes without permission | ||||||
  No | 10.99 | (10.51–11.50) | 5.46 | (5.14–5.80) | 8.03 | (7.74–8.32) |
  Yes | 21.09 | (20.00–22.21) | 12.67 | (11.78–13.59) | 17.02 | (16.31–17.76) |
Context of violence | ||||||
 Suffering family violence | ||||||
  No | 11.82 | (11.37–12.29) | 5.93 | (5.62–6.27) | 8.78 | (8.50–9.06) |
  Yes | 32.11 | (29.98–34.33) | 16.85 | (15.45–18.35) | 23.47 | (22.23–24.77) |
 Suffering bullying | ||||||
  No | 13.40 | (12.92–13.9) | 6.64 | (6.32–6.98) | 9.84 | (9.55–10.14) |
  Yes | 18.37 | (16.59–20.29) | 14.68 | (12.85–16.72) | 16.63 | (15.34–18.01) |
 Unsafe on the way to and from and/or at school | ||||||
  No | 11.58 | (11.13–12.06) | 6.22 | (5.90–6.56) | 8.76 | (8.48–9.05) |
  Yes | 28.84 | (27.04–30.69) | 14.62 | (13.30–16.05) | 21.86 | (20.71–23.05) |