Figure 5From: Modeling emergency department visit patterns for infectious disease complaints: results and application to disease surveillance Results on validation data for Respiratory Complaints. Prospective data (June 1, 2002 through May 31, 2003 (a) Daily, predicted, and upper control limit for respiratory counts ; (b) Scaled forecast errors for respiratory counts; (c) Page's statistic applied to the same forecast errors. A control value of 3.3 bfor Page's statistic results in an approximate theoretical 2.5% false alarm rate when forecast errors are Gaussian.Back to article page