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Prototype Prescribing Outlier Dashboard for Priory Medical Group

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 Priory Medical Group is higher than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Asenapine 30 Drugs used for mania and hypomania 287 0.10 0.00 0.01 20.71
Amiloride hydrochloride with loop diuretics 8 Potassium sparing diuretics and compounds 8 1.00 0.02 0.08 12.10
Eslicarbazepine acetate 192 Control of epilepsy 7,850 0.02 0.00 0.00 8.51
Sucroferric oxyhydroxide 18 Phosphate binding agents 53 0.34 0.00 0.05 7.32
Telmisartan 636 Angiotensin-II receptor antagonists 4,351 0.15 0.01 0.02 5.95
Lixisenatide 19 Other antidiabetic drugs 731 0.03 0.00 0.01 4.43
Valaciclovir 72 Herpes simplex and varicella-zoster 250 0.29 0.04 0.06 4.02
Biphasic isophane insulin 406 Intermediate and long-acting insulins 756 0.54 0.13 0.11 3.67
Methylcellulose 2 Bulk-forming laxatives 166 0.01 0.00 0.00 3.34
Carbomer 940/980 636 Tear deficiency, eye lubricant/astringent 803 0.79 0.34 0.15 3.06

Prescribing where Priory Medical Group is lower than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Aciclovir 178 Herpes simplex and varicella-zoster 250 0.71 0.95 0.07 -3.63
Aspirin 4,025 Antiplatelet drugs 8,033 0.50 0.65 0.06 -2.47
Clarithromycin 125 Macrolides 692 0.18 0.57 0.16 -2.45
Permethrin 11 Parasiticidal preparations 44 0.25 0.83 0.24 -2.42
Other multivitamin preparations 49 Multivitamin preparations 149 0.33 0.82 0.21 -2.38
Glycopyrronium bromide 0 Antimuscarinic drugs 8 0.00 0.82 0.35 -2.34
    Midazolam hydrochloride 3 Drugs used in status epilepticus 18 0.17 0.80 0.28 -2.23
    Co-amilofruse (Amiloride hydrochloride/frusemide) 0 Potassium sparing diuretics and compounds 8 0.00 0.69 0.33 -2.10
      Co-codamol (Codeine phosphate/paracetamol) 861 Non-opioid analgesics and compound preparations 6,636 0.13 0.45 0.15 -2.09
      Hypromellose 126 Tear deficiency, eye lubricant/astringent 803 0.16 0.45 0.15 -1.93