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Table 3 Negative binomial results, full and final models, Vancouver Island

From: An evaluation of bylaw and policy changes on pharmacy robberies in British Columbia

 

Estimated parameter

Std. error

Relative risk ratio

Full model

 Bylaw

0.089

1.688

1.094

 Bylaw trend

− 0.088

0.071

0.916

 Month

− 0.525

0.433

0.591

 Month-squared

0.041

0.033

1.042

 Number of days

− 0.101

0.364

0.904

 Trend

0.028

0.027

1.029

 Trend-squared

− 0.001

0.001

0.999

Final model

 Trend

0.036

0.022

1.036*

 Trend-squared

− 0.001

0.001

0.999*

  1. Policy change variables (Bylaw and Bylaw trend), seasonality variables (Month and Month-squared), and overall trend variables (Trend and Trend-squared)
  2. *p < 0.10; **p < 0.05; ***p < 0.01
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Crime Science

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