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Prototype Prescribing Outlier Dashboard for St Vincent Medical Centre

At OpenPrescribing we are piloting a number of data-driven approaches to identify unusual prescribing and collect feedback on this prescribing to inform development of new tools to support prescribers and organisations to audit and review prescribing. These pilot results are provided for the interest of advanced users, although we don't know how relevant they are in practice. There is substantial variation in prescribing behaviours, across various different areas of medicine. Some variation can be explained by demographic changes, or local policies or guidelines, but much of the remaining variation is less easy to explain.

The DataLab is keen to hear your feedback on the results. You can do this by completing the following survey or emailing us at [email protected]. Please DO NOT INCLUDE IDENTIFIABLE PATIENT information in your feedback. All feedback is helpful, you can send short or detailed feedback.

This report has been developed to automatically identify prescribing patterns at a chemical level which are furthest away from “typical prescribing” and can be classified as an “outlier”. We calculate the number of prescriptions for each chemical in the BNF coding system, the count of all prescriptions within that chemical's BNF subparagraph, for prescriptions dispensed between June 2021 and December 2021. We then calculate the ratio of these counts along with the mean and standard deviation of those ratios across all Practices. From this we can calculate the “z-score”, which is a measure of how many standard deviations a given Practice is from the population mean. We then rank your “z-scores” to find the top 10 results where prescribing is an outlier for prescribing higher than its peers and those where it is an outlier for prescribing lower than its peers.

For each outlier chemical, a kernel density estimation plot of all Practice's chemical:subparagraph ratios is provided, with this Practice's ratio overlaid in red.

It is important to remember that this information was generated automatically and it is therefore likely that some of the behaviour is warranted. This report seeks only to collect information about where this variation may be warranted and where it might not, to inform research on this topic. Our full analytical method code is openly available on GitHub here.

This is a new, experimental feature. We'd love to .

Prescribing where St Vincent Medical Centre is higher than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Freeze sprays and gels 10 Rubefacients, topical NSAIDS, capsaicin and poultice 1,940 0.01 0.00 0.00 13.32
Ciprofloxacin/fluocinolone 26 Otitis externa 287 0.09 0.00 0.01 10.81
Ins degludec/liraglutide 83 Other antidiabetic drugs 2,790 0.03 0.00 0.00 5.72
Pantoprazole 1,813 Proton pump inhibitors 12,717 0.14 0.02 0.02 5.52
Flupentixol hydrochloride 34 Antipsychotic drugs 778 0.04 0.00 0.01 4.90
Naphazoline hydrochloride 6 Other anti-inflammatory preparations 266 0.02 0.00 0.01 4.07
Testosterone undecanoate 121 Male sex hormones and antagonists 832 0.15 0.03 0.03 3.73
Rabeprazole sodium 349 Proton pump inhibitors 12,717 0.03 0.00 0.01 3.57
Ibandronic acid 99 Bisphosphonates and other drugs 747 0.13 0.02 0.03 3.32
Felodipine 1,919 Calcium-channel blockers 5,644 0.34 0.08 0.08 3.13

Prescribing where St Vincent Medical Centre is lower than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Gliclazide 458 Sulfonylureas 876 0.52 0.93 0.13 -3.00
Amlodipine 2,590 Calcium-channel blockers 5,644 0.46 0.76 0.11 -2.64
Omeprazole 1,904 Proton pump inhibitors 12,717 0.15 0.50 0.16 -2.15
Oral rehydration salts 13 Oral sodium and water 65 0.20 0.71 0.29 -1.74
Latanoprost 346 Treatment of glaucoma 1,970 0.18 0.31 0.08 -1.61
Cabergoline 6 Bromocriptine and other dopaminergic drugs 14 0.43 0.86 0.27 -1.59
Tacrolimus 0 Corticosteroids and other immunosuppressants 12 0.00 0.63 0.40 -1.58
    Finasteride 534 Male sex hormones and antagonists 832 0.64 0.82 0.11 -1.56
    Dorzolamide and timolol 47 Treatment of glaucoma 1,970 0.02 0.09 0.04 -1.50
    Folic acid 1,000 Drugs used in megaloblastic anaemias 2,179 0.46 0.69 0.16 -1.49