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Prototype Prescribing Outlier Dashboard for The Lewisham Care Partnership

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 The Lewisham Care Partnership is higher than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Olmesartan medoxomil/hydrochlorothiazide 34 Angiotensin-II receptor antagonists 1,360 0.02 0.00 0.00 9.23
Magnesium trisilicate 6 Antacids and simeticone 7 0.86 0.03 0.13 6.38
Fosinopril sodium 4 Angiotensin-converting enzyme inhibitors 2,255 0.00 0.00 0.00 3.93
Duloxetine hydrochloride 80 Drugs for urinary frequency enuresis and incontinence 435 0.18 0.04 0.04 3.77
Amiloride hydrochloride with loop diuretics 8 Potassium sparing diuretics and compounds 25 0.32 0.02 0.08 3.75
Cyclizine lactate 21 Drugs used in nausea and vertigo 291 0.07 0.01 0.02 3.62
Acenocoumarol 8 Oral anticoagulants 705 0.01 0.00 0.00 3.62
Sodium clodronate 3 Bisphosphonates and other drugs 172 0.02 0.00 0.00 3.45
Telmisartan with diuretic 19 Angiotensin-II receptor antagonists 1,360 0.01 0.00 0.00 3.19
Hydrocortisone sodium phosphate 4 Use of corticosteroids 289 0.01 0.00 0.00 3.12

Prescribing where The Lewisham Care Partnership is lower than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Isosorbide mononitrate 92 Nitrates 239 0.38 0.72 0.11 -3.14
Water for injection 1 Electrolytes and water 15 0.07 0.82 0.25 -3.06
Urea hydrogen peroxide 0 Removal of ear wax and other substances 1 0.00 0.83 0.33 -2.52
    Spironolactone 83 Potassium-sparing diuretics and aldosterone antagonists 181 0.46 0.72 0.14 -1.89
    Neomycin sulfate 21 Nasal preparations for infection 36 0.58 0.84 0.14 -1.85
    Naftidrofuryl oxalate 0 Peripheral vasodilators and related drugs 9 0.00 0.67 0.39 -1.73
      Glucose 7 Treatment of hypoglycaemia 17 0.41 0.75 0.20 -1.70
      Apixaban 129 Oral anticoagulants 705 0.18 0.41 0.14 -1.60
      Fluorouracil (Sunscreen) 0 Sunscreening preparations 19 0.00 0.45 0.29 -1.55
        Prednisolone 6 Copound haemorrhoidal preparations with corticosteroid 74 0.08 0.43 0.24 -1.46