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Prototype Prescribing Outlier Dashboard for Balfour 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 Balfour Medical Centre is higher than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Magnesium lactate 4 Magnesium 4 1.00 0.01 0.06 16.98
Oxazepam 29 Anxiolytics 147 0.20 0.01 0.02 8.07
Glipizide 24 Sulfonylureas 386 0.06 0.00 0.01 6.35
Sildenafil(Vasodilator Antihypertensive) 8 Vasodilator antihypertensive drugs 11 0.73 0.03 0.13 5.44
Empagliflozin/metformin 127 Other antidiabetic drugs 1,161 0.11 0.01 0.02 5.36
Levodopa/carbidopa/entacapone 39 Dopaminergic drugs used in parkinsonism 169 0.23 0.03 0.04 4.55
Paraffin soft white 5 Emollients 209 0.02 0.00 0.01 4.40
Other eye tear/lubricant/astringent preparations 16 Tear deficiency, eye lubricant/astringent 172 0.09 0.01 0.02 4.01
Malathion 1 Parasiticidal preparations 1 1.00 0.13 0.22 3.97
Chlortalidone 7 Thiazides and related diuretics 459 0.02 0.00 0.00 3.83

Prescribing where Balfour Medical Centre is lower than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Potassium citrate 0 Drugs used in urological pain 1 0.00 0.92 0.25 -3.67
    Permethrin 0 Parasiticidal preparations 1 0.00 0.83 0.24 -3.46
      Finasteride 67 Male sex hormones and antagonists 141 0.48 0.82 0.11 -3.02
      Hydralazine hydrochloride 3 Vasodilator antihypertensive drugs 11 0.27 0.85 0.28 -2.07
      Coal tar 12 Shampoos and some other scalp preparations 91 0.13 0.40 0.15 -1.79
      Diltiazem hydrochloride 11 Calcium-channel blockers 2,428 0.00 0.05 0.03 -1.78
      Other food for special diet preparations 20 Foods for special diets 78 0.26 0.65 0.24 -1.62
      Aciclovir 17 Herpes simplex and varicella-zoster 20 0.85 0.95 0.07 -1.56
      Lithium carbonate 8 Drugs used for mania and hypomania 44 0.18 0.61 0.28 -1.54
      Codeine phosphate 45 Opioid analgesics 1,042 0.04 0.21 0.11 -1.51