Figure 3From: Influence of safety warnings on ESA prescribing among dialysis patients using an interrupted time series ESA units/week per month for the US hemodialysis population from September 2004 to August 2009 by facility organizational status . The straight solid line is for the trend derived from the interrupted time series regression model, the cross (+) is the observed value and the diamond (♦) is the predicted value based on the interrupted time series model. The model parameters for all figures are presented in Table 3.Back to article page