Fig. 1From: Detecting change in comparison to peers in NHS prescribing data: a novel application of cumulative sum methodologyGraphs showing an example measure used to develop the alerts. Showing: a the measure as on openprescribing.net: Cerazette vs. desogestrel in 05D, b the percentiles with alerts highlighted for the standard method, c the cumulative sum, with threshold values for the standard method, d the percentiles with alerts highlighted for the continuing change method, e the cumulative sum, with threshold values for the continuing change method. Increase alerts all lie above the reference percentile line, while decrease alerts all lie below itBack to article page