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Table 3 Logistic regression analysis of relationships between alcohol consumers' demographics, methods of accessing alcohol, income and drinking behaviours

From: Predictors of risky alcohol consumption in schoolchildren and their implications for preventing alcohol-related harm

   Drinking behaviour1
   Binge drink Frequently drink Drink in public settings Any risk All risks
   AOR (95%CI) P AOR (95%CI) P AOR (95%CI) P AOR (95%CI) P AOR (95%CI) P
  Sample Size 7704   7536   7704   7704   7536  
Sex Female Ref   Ref   Ref   Ref   Ref  
  Male 1.35 (1.20–1.53) < 0.001 1.46 (1.27–1.68) < 0.001 0.88 (0.77–1.00) 0.055 1.11 (0.96–1.29) 0.153 1.61 (1.31–1.98) < 0.001
Age 15 Ref   Ref   Ref   Ref   Ref  
  16 1.06 (0.96–1.18) 0.256 1.11 (0.98–1.25) 0.091 1.12 (0.99–1.26) 0.076 1.09 (0.97–1.22) 0.162 1.35 (1.12–1.63) < 0.005
Deprivation quintile (Least deprived) 1 Ref   Ref   Ref   Ref   Ref  
  2 1.16 (0.95–1.42) 0.151 0.99 (0.80–1.23) 0.939 1.14 (0.92–1.40) 0.236 1.27 (1.01–1.58) < 0.05 0.95 (0.75–1.20) 0.650
  3 1.21 (0.97–1.51) 0.092 1.15 (0.92–1.43) 0.225 1.26 (1.01–1.57) < 0.05 1.24 (1.00–1.53) < 0.05 1.19 (0.89–1.59) 0.232
  4 1.09 (0.86–1.39) 0.456 1.17 (0.96–1.42) 0.113 1.33 (1.06–1.69) < 0.05 1.23 (1.01–1.51) < 0.05 1.21 (0.96–1.54) 0.111
  (Most deprived) 5 1.07 (0.78–1.47) 0.652 1.15 (0.92–1.44) 0.227 1.17 (0.93–1.48) 0.178 1.15 (0.89–1.49) 0.291 1.23 (0.89–1.69) 0.207
Ethnicity White Ref   Ref   Ref   Ref   Ref  
  Black/Black British 0.66 (0.33–1.29) 0.221 0.50 (0.20–1.22) 0.128 0.93 (0.43–2.01) 0.850 0.58 (0.28–1.19) 0.134 0.31 (0.06–1.45) 0.134
  Chinese/Chinese British 0.81 (0.37–1.74) 0.583 0.83 (0.39–1.78) 0.636 0.91 (0.39–2.13) 0.820 0.72 (0.31–1.69) 0.453 1.45 (0.42–4.99) 0.551
  Asian/Asian British 1.70 (1.01–2.86) < 0.05 0.96 (0.60–1.54) 0.859 1.62 (0.90–2.94) 0.110 1.62 (0.94–2.79) 0.079 1.99 (0.88–4.51) 0.097
  Mixed Race 1.43 (0.77–2.64) 0.251 1.04 (0.59–1.82) 0.901 2.02 (0.98–4.13) 0.055 1.97 (0.96–4.04) 0.064 2.35 (0.96–5.73) 0.061
  Other 0.80 (0.29–2.20) 0.668 0.76 (0.29–2.20) 0.662 1.54 (0.45–5.29) 0.493 1.68 (0.63–4.50) 0.300 0.95 (0.16–5.72) 0.957
Spending money (£/week) < = 10 Ref   Ref   Ref   Ref   Ref  
  11 to 20 1.38 (1.21–1.58) < 0.001 1.57 (1.35–1.83) < 0.001 1.51 (1.30–1.76) < 0.001 1.47 (1.28–1.68) < 0.001 2.36 (1.79–3.10) < 0.001
  21 to 30 1.50 (1.28–1.76) < 0.001 2.18 (1.81–2.36) < 0.001 1.72 (1.42–2.08) < 0.001 1.90 (1.57–2.30) < 0.001 3.04 (2.26–4.09) < 0.001
  > 30 1.50 (1.27–1.78) < 0.001 2.37 (1.98–2.84) < 0.001 2.01 (1.69–2.39) < 0.001 2.25 (1.82–2.79) < 0.001 3.11 (2.37–4.07) < 0.001
Ever buy alcohol No Ref   Ref   Ref   Ref   Ref  
  Yes 1.85 (1.64–2.09) < 0.001 2.88 (2.53–3.27) < 0.001 5.72 (4.96–6.60) < 0.001 5.92 (5.02–6.97) < 0.001 3.53 (2.90–4.30) < 0.001
Member of youth club, group or team No Ref   Ref   Ref   Ref   Ref  
  Yes 1.09 (0.98–1.21) 0.128 0.71 (0.63–0.81) < 0.001 0.90 (0.80–1.00) 0.052 0.92 (0.81–1.04) 0.192 0.77 (0.66–0.90) < 0.005
Others buying youths alcohol            
Parents No Ref   Ref   Ref   Ref   Ref  
  Yes 0.82 (0.73–0.92) < 0.005 1.00 (0.88–1.15) 0.954 0.51 (0.45–0.57) < 0.001 0.67 (0.59–0.76) < 0.001 0.79 (0.65–0.96) < 0.05
Older siblings No Ref   Ref   Ref   Ref   Ref  
  Yes 1.31 (1.12–1.52) < 0.005 1.20 (1.02–1.43) < 0.05 1.31 (1.08–1.58) < 0.01 1.49 (1.22–1.81) < 0.001 1.20 (0.96–1.51) 0.112
Friends (over 18) No Ref   Ref   Ref   Ref   Ref  
  Yes 1.40 (1.24–1.58) < 0.001 1.43 (1.26–1.63) < 0.001 2.13 (1.86–2.45) < 0.001 2.42 (2.07–2.83) < 0.001 1.46 (1.20–1.76) < 0.001
Friends (under 18) No Ref   Ref   Ref   Ref   Ref  
  Yes 1.19 (1.05–1.35) < 0.01 1.09 (0.94–1.28) 0.251 1.74 (1.47–2.07) < 0.001 1.78 (1.46–2.17) < 0.001 1.28 (1.03–1.58) < 0.05
Adult outside shops No Ref   Ref   Ref   Ref   Ref  
  Yes 0.97 (0.82–1.15) 0.739 1.58 (1.32–1.89) < 0.001 4.84 (3.85–6.09) < 0.001 4.71 (3.53–6.30) < 0.001 1.37 (1.06–1.77) < 0.05
Take/steal from parents No Ref   Ref   Ref   Ref   Ref  
  Yes 0.89 (0.75–1.06) 0.175 1.33 (1.09–1.63) < 0.01 1.09 (0.85–1.40) 0.497 1.19 (0.93–1.51) 0.163 1.03 (0.74–1.45) 0.848
  1. 1 Drinking behaviours are defined as binge drink (usually having five or more alcoholic drinks per session); frequently drink (usually drinking at least two or more days each week) and drink in public settings (including drinking in streets, parks, pubs and clubs and excluding drinking at home, in friends' houses and on special occasions with family and friends). "Any drinking risk" and "all drinking risks" are composite variables calculated as having any one of the three individual risk factors and having all three risk factors respectively. Logistic regression was undertaken in STATA and utilised appropriate corrections for cluster sampling (see methods). Sample sizes vary as individuals not answering all questions included in the logistic regression analysis were excluded from the final model. AOR = Adjusted Odds Ratio. Ref = Reference category. AOR = Adjusted Odds Ratio. Ref = Reference category.