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Prototype Prescribing Outlier Dashboard for Bentley Medical Practice

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 Bentley Medical Practice is higher than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Freeze sprays and gels 9 Rubefacients, topical NSAIDS, capsaicin and poultice 1,156 0.01 0.00 0.00 20.15
Clomethiazole 31 Hypnotics 971 0.03 0.00 0.01 5.35
Malathion 3 Parasiticidal preparations 3 1.00 0.13 0.22 3.97
Bromocriptine 3 Bromocriptine and other dopaminergic drugs 3 1.00 0.10 0.23 3.87
Other soothing haemorrhoidal preparations 3 Soothing haemorrhoidal preparations 20 0.15 0.00 0.04 3.86
Magnesium oxide 8 Antacids and simeticone 11 0.73 0.05 0.18 3.73
Celiprolol hydrochloride 36 Beta-adrenoceptor blocking drugs 6,251 0.01 0.00 0.00 3.50
Pimozide 9 Antipsychotic drugs 1,366 0.01 0.00 0.00 3.47
Cinnarizine 219 Drugs used in nausea and vertigo 1,110 0.20 0.05 0.04 3.47
Betamethasone sodium phosphate 35 Otitis externa 170 0.21 0.03 0.06 3.02

Prescribing where Bentley Medical Practice is lower than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Permethrin 0 Parasiticidal preparations 3 0.00 0.83 0.24 -3.46
    Cabergoline 0 Bromocriptine and other dopaminergic drugs 3 0.00 0.86 0.27 -3.17
      Urea hydrogen peroxide 0 Removal of ear wax and other substances 1 0.00 0.83 0.33 -2.52
        Insulin aspart 193 Short-acting insulins 365 0.53 0.79 0.11 -2.32
        Estradiol 64 Oestrogens and Hormone Replacement Therapy 314 0.20 0.47 0.14 -1.91
        Beclometasone dipropionate 1,013 Corticosteroids (respiratory) 2,785 0.36 0.58 0.12 -1.85
        Nitrofurantoin 583 Urinary-tract infections 674 0.86 0.96 0.06 -1.68
        Progesterone 5 Progestogens and progesterone receptor modulators 67 0.07 0.53 0.27 -1.68
        Salbutamol 3,538 Selective beta(2)-agonists 4,241 0.83 0.91 0.04 -1.62
        Chloramphenicol 134 Antibacterials 211 0.64 0.81 0.11 -1.61