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Table 2 Correlation coefficients with 95% confidence intervals and Cronbach’s Alpha reliability coefficients

From: Validation of commercial business lists as a proxy for licensed alcohol outlets

  All Rural Sub-Urban Urban Core
(N = 5528) (n = 113) (n = 356) (n = 5059)
Proximity r[95% CI]; α r[95% CI]; α r[95% CI]; α r[95% CI]; α
Euclidean Distance(miles) 0.83 [0.82, 0.84]; 0.90 0.75 [0.66, 0.82]; 0.85 0.82 [0.78, 0.85]; 0.89 0.82 [0.81, 0.83]; 0.90
Network Time (minutes) 0.86 [0.85, 0.86]; 0.92 0.66 [0.55, 0.76]; 0.90 0.84 [0.80, 0.87]; 0.90 0.90 [0.90, 0.91]; 0.95
Network Distance (miles) 0.77 [0.76, 0.78]; 0.87 0.47 [0.32, 0.60]; 0.91 0.84 [0.81, 0.87]; 0.91 0.85 [0.84, 0.86]; 0.92
Density
 KDE (outlets per sqmi) 0.98 [0.98, 0.98]; 0.97 0.91 [0.87, 0.94]; 0.94 0.89 [0.86, 0.91]; 0.94 0.98 [0.98, 0.98]; 0.96
 2 mi Radius (count) 0.98 [0.97, 0.98]; 0.99 0.91 [0.88, 0.94]; 0.94 0.89 [0.87, 0.91]; 0.94 0.97 [0.97, 0.98]; 0.97