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Table 3 Ordinal logistic regression of binge drinking and friendship networks, comparing binge drinking frequency of “less than monthly to monthly” frequency with “ weekly to daily” with “never” binge drinking among adolescents in Belo Horizonte, Minas Gerais, Brazil (n = 891), 2010

From: Association between binge drinking, type of friends and gender: A cross-sectional study among Brazilian adolescents

  ALL PARTICIPANTS FEMALE MALE
   Crude OR (95% CI) Adjusted OR (95% CI) p-value Adjusted* Crude OR (95% CI) Adjusted OR (95% CI) p-value Adjusted* Crude OR (95% CI) Adjusted OR (95% CI) p-value Adjusted*
Most Important groups of friends or close friends School 3.77 (2.27–6.25) 3.55 (1.91–5.87) <0.001 4.25 (2.25–8.03) 3.70 (1.84–7.45) <0.001 2.91 (1.24–6.84) 2.44 (0.91–6.46) 0.073
Family 1.99 (1.16–3.43) 1.79 (0.98–3.27) 0.055 2.41 (1.24–4.72) 2.00 (0.96–4.17) 0.064 1.34 (0.52–3.44) 1.49 (0.50–4.50) 0.474
**Hobbies/ others 1.89 (1.00–3.57) 1.54 (0.78–3.04) 0.207 2.11 (0.89–4.96) 1.74 (0.71–4.29) 0.225 1.30 (0.49–3.45) 1.12 (0.37–3.35) 0.837
Church 1.00 1.00   1.00 1.00   1.00 1.00  
Majority of friends that have the same work or occupation Yes 1.57 (1.08–2.29) 1.25 (0.79–1.98) 0.340 1.60 (1.00–2.54) 1.20 (0.67–2.16) 0.538 1.50 (0.80–2.83) 1.31 (0.59–2.94) 0.505
No 1.00 1.00   1.00 1.00   1.00 1.00  
Educational background or level for the majority of friends Yes 1.40 (0.94–2.08) 0.73 (0.44–1.18) 0.200 1.53 (0.93–2.51) 0.80 (0.43–1.50) 0.492 1.17 (0.59–2.31) 0.63 (0.27–1.46) 0.282
No 1.00 1.00   1.00 1.00   1.00   
Number of groups of friends < 2 1.25 (0.84–1.85) 1.37 (0.89–2.11) 0.143 1.01 (0.62–1.65) 1.14 (0.68–1.93) 0.618 2.15 (1.06–4.36) 2.21 (1.00–4.87) 0.049
≥ 2 1.00 1.00   1.00    1.00 1.00  
Age 15–16 0.98 (0.65–1.49) 0.82 (0.44–1.52) 0.524 0.84 (0.36–1.95) 0.66 (0.27–1.59) 0.358 0.95 (0.41–2.20) 0.88 (0.35–2.21) 0.793
  17 1.17 (0.74–1.84) 1.48 (0.76–2.86) 0.245 1.31 (0.54–3.19) 1.01 (0.40–2.54) 0.974 2.22 (0.87–5.71) 2.44 (0.90–6.63) 0.081
  18-19 1.00 1.00   1.00      
Mother’s educational background 0–7 years 0.66 (0.45–0.98) 0.94 (0.56–1.58) 0.825 0.63 (0.39–1.01) 1.01 (0.52–1.95) 0.970 0.78 (0.40–1.51) 0.87 (0.36–2.11)  
  8 or more 1.00 1.00   1.00 1.00   1.00 1.00  
Father’s educational background 0–7 years 0.60 (0.43–0.83) 1.08 (0.65–1.80) 0.751 0.61 (0.38–0.97) 0.93 (0.48–1.79) 0.830 0.88 (0.47–1.63) 1.47 (0.63–3.43) 0.376
  8 or more 1.00 1.00   1.00 1.00   1.00 1.00  
Type of school Public 0.60 (0.40–0.89) 0.74 (0.45–1.23) 0.245 0.59 (0.36–0.96) 0.80 (0.43–1.49) 0.485 0.64 (0.33–1.25) 0.63 (0.30–1.35) 0.236
  Private 1.00 1.00   1.00 1.00   1.00 1.00  
IVS Low Vulnerability 1.66 (1.15–2.41) 1.66 (1.05–2.62) 0.028 1.83 (1.46–2.92) 1.62 (0.90–2.92) 0.104 1.48 (0.80–2.76) 1.97 (0.90–4.32) 0.089
  Great Vulnerability 1.00 1.00   1.00 1.00   1.00 1.00  
Gender Male 1.24 (0.94–1.62) 1.52 (1.01–2.28) 0.044       
  Female 1.00 1.00        
  1. * Adjusted for age, sex, type of school, mother’s education and Social Vulnerability Index (SVI).
  2. **Hobbies/others (friends from theater, dances, music activities, sports, and others).