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Table 1 Regression models testing change in outcome variables pre- and post-intervention

From: Short-term changes in nightlife attendance and patron intoxication following alcohol restrictions in Queensland, Australia

Variable June
M (SE) or %
July
M (SE) or %
Test statistic 95% CI
Hours out (n = 1058) 4.6 (0.14) 5.7 (0.13) β = 0.17 0.11, 0.22
Arrival at precinct ≤10:00 pm (n = 900) 43% 50% OR = 1.38 1.04, 1.82
Pre-drinking (yes) (n = 1035) 85% 85% OR = 1.05 0.75, 1.48
Number of pre-drinks (n = 879) 8.1 (0.28) 7.5 (0.25) IRR = 0.93 0.84, 1.02
Mean BAC (g/dL) (n = 986) 0.081 (0.033) 0.079 (0.002) β = −0.003 −0.010, 0.005
BAC categories (g/dL) (n = 986)
 0.0 (sober) 15% 12% RRR = 0.60 0.40, 0.90
  > 0.0 to < 0.05 (slight) 17% 17% RRR = 0.73 0.50, 1.06
  ≥ 0.05 to < 0.10 (moderate) 30% 41% RRR = 1.00  
  ≥ 0.10 (high)a 38% 30% RRR = 0.58 0.43, 0.79
  1. Note. All models adjust for hour of interview. June is the reference category for all models
  2. aWithin the BAC category of ≥0.10 g/dL, 74% of participants in both June and July recorded a BAC of ≥0.12 g/dL and 28% (June) to 32% (July) had a BAC of ≥0.15 g/dL
  3. M = Mean
  4. SE = Standard error
  5. 95% CI = 95% confidence interval
  6. β = Beta-weight
  7. OR = Odds ratio
  8. IRR = Incidence rate ratio
  9. RRR = Relative risk ratio