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Table 1 Distribution of the sample based on the prevalence of friendship network and by background characteristics in Belo Horizonte, Minas Gerais, Brazil, 2010 (N = 891)

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

   Most important groups of close friends
Independent
variables
School Family Hobbies and others ** Church   Total
n (%)
*p-value Degrees of freedom
n (%) n (%) n (%) n (%)     
Binge drinking Never 98 (24.7) 92 (23.2) 64 (16.2) 142 (35.9) 396 (100)    
  Less than monthly to monthly 74 (42.0) 42 (23.9) 26 (14.8) 34 (19.3) 176 (100) 28.978 0.000 6
  Weekly to daily 29 (42.6) 15 (22.1) 11 (16.2) 13 (19.1) 68 (100)    
  Total 201 (31.4) 149 (23.3) 101 (15.8) 189 (29.5) 640 (100)    
Age 15 to 16 years old 109 (27.6) 104 (26.3) 63 (15.9) 119 (30.1) 395 (100)   0.065 6
  17 years old 64 (38.3) 34 (20.4) 22 (13.2) 47 (28.1) 167 (100) 11.873   
  18 to 19 years old 28 (35.9) 11 (14.1) 16 (20.5) 23 (29.5) 78 (100)    
  Total 201 (31.4) 149 (23.3) 101 (15.8) 189 (29.5) 640 (100)    
Gender Male 71 (31.8) 46 (20.6) 48 (21.5) 58 (26.0) 223 (100) 9.647 0.022 3
  Female 130 (31.2) 103 (24.7) 53 (12.7) 131 (31.4) 417 (100)    
  Total 201 (31.4) 149 (23.3) 101 (15.8) 189 (29.5) 640 (100)    
Type of School Public 153 (31.2) 84 (17.1) 79 (16.1) 175 (35.6) 491 (100) 61.354 0.000 3
  Private 48 (32.2) 65 (43.6) 22 (14.8) 14 (9.4) 149 (100)    
  Total 201 (31.4) 149 (23.3) 101 (15.8) 189 (29.5) 640 (100)    
Mother’s educational background O to 7 years of study 64 (31.4) 24 (11.8) 28 (13.7) 88 (43.1) 204 (100) 40.156 0.000 3
  8 or more years of study 106 (31.7) 106 (31.7) 49 (14.7) 73 (21.9) 334 (100)    
  Total 170 (31.6) 130 (24.2) 77 (14.3) 161 (29.9) 538 (100)    
  O to 7 years of study 66 (29.9) 35 (15.8) 31 (14.0) 89 (40.3) 221 (100) 36.996 0.000 3
Father’s educational background 8 or more years of study 96 (35.2) 90 (33.0) 38 (13.9) 49 (17.9) 273 (100)    
  Total 162 (32.8) 125 (25.3) 69 (14.0) 138 (27.9) 494 (100)    
  High vulnerability (class I and II) 90 (29.3) 38 (12.4) 57 (18.6) 122 (39.7) 307 (100) 54.672 0.000 3
SVI Low vulnerability (class III, IV and V) 111 (33.3) 111 (33.3) 44 (13.2) 67 (20.1) 333 (100)    
  Total 201 (31.4) 149 (23.3) 101 (15.8) 189 (29.5) 640 (100)    
  1. *Chi-squared test.
  2. **Hobbies (friends from theater, dances, music activities, sports, and others).
  3. Note: the total number may differ due to missing values.