Skip to main content

Table 1 Regression analysis for the total requests per pharmacy per month

From: Evaluation of pseudoephedrine pharmacy sales before and after mandatory recording requirements in Western Australia: a case study

Variable Chi-square (DF) Rate ratio 95 % CI p-value
Season 4741 (3)    <0.0001
 Summer   0.57 0.56–0.59 <0.0001
 Autumn   0.99 0.98–1.01 0.4587
 Winter   1.44 1.42–1.47 <.0001
 Spring   1 (reference)   
Mandatory 0.85 (1) 0.98 0.94–1.02 0.3578
Year 2.1 (1) 0.97 0.94–1.01 0.1463
Mandatory Yeara 4.2 (1) 0.95 0.91–1.00 0.0415
 Year (before)b   0.97 0.94–1.01 0.1463
 Year (after)b   0.93 0.91–0.95 <0.0001
  1. Correlations between observations made at the same pharmacies were taken into account as a random effect
  2. aInteraction term between year and Mandatory (indicating pre- or post- reporting)
  3. bSeparate annual rates pre- and post-mandatory reporting