Static outliers for Fernville Surgery

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. 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.

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 using the BNF subparagraph as a denominator, for prescriptions dispensed between April 2021 and August 2021. We then calculate the mean and standard deviation for each numerator and denominator pair across all practices/CCGs/PCNs/STPs. From this we can calculate the “z-score”, which is a measure of how many standard deviations a given practice/CCG/PCN/STP is from the population mean. We then rank your “z-scores” to find the top 5 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.

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. Our full analytical method code is openly available on GitHub here.

The DataLab is keen to hear your feedback on the results. You can do this by completing the following survey or emailing us at ebmdatalab@phc.ox.ac.uk. Please DO NOT INCLUDE IDENTIFIABLE PATIENT information in your feedback. All feedback is helpful, you can send short or detailed feedback.

Prescribing where Fernville Surgery is higher than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Probenecid 7 Gout and cytotoxic induced hyperiuicaemia 791 0.01 0.00 0.00 10.63
Low protein cereals 3 Foods for special diets 58 0.05 0.00 0.01 6.73
Hydrocortisone 24 Otitis externa 174 0.14 0.01 0.02 5.72
Dapagliflozin/metformin 98 Other antidiabetic drugs 1658 0.06 0.00 0.01 5.09
Ciclosporin 4 Tear deficiency, eye lubricant/astringent 242 0.02 0.00 0.00 4.28

Prescribing where Fernville Surgery is lower than most

BNF Chemical Chemical Items BNF Subparagraph Subparagraph Items Ratio Mean std Z_Score Plots
Oral rehydration salts 5 Oral sodium and water 70 0.07 0.68 0.31 -1.97
Zinc sulfate monohydrate 0 Zinc 2 0.00 0.73 0.40 -1.84
Pregabalin 433 Control of epilepsy 3511 0.12 0.27 0.08 -1.84
Beclometasone dipropionate 649 Corticosteroids (respiratory) 1785 0.36 0.57 0.12 -1.73
Clenil Modulite 50micrograms/dose inhaler : 48
Clenil Modulite 100micrograms/dose inhaler : 309
Clenil Modulite 200micrograms/dose inhaler : 59
Fostair 100micrograms/dose / 6micrograms/dose inhaler : 106
Fostair 200micrograms/dose / 6micrograms/dose inhaler : 37
Qvar 100 Autohaler : 2
Beclometasone 100microg/Formoterol 6microg/dose inh CFCfree : 1
Beclometasone 200microg/Formoterol 6microg/dose dry pdr inh : 1
Qvar 50 inhaler : 9
Qvar 50 Autohaler : 4
Beclometasone 100microg/Formoterol 6microg/dose dry pdr inh : 13
Qvar 100 inhaler : 13
Beclometasone 100micrograms/dose inhaler CFC free : 17
Beclometasone 50micrograms/dose inhaler CFC free : 7
Soprobec 100micrograms/dose inhaler : 7
Beclometasone 200microg/Formoterol 6microg/dose inh CFC free : 6
Clenil Modulite 250micrograms/dose inhaler : 5
Fostair NEXThaler 100microg/dose / 6microg/dose dry pdr inh : 5
Moxonidine 3 Centrally-acting antihypertensive drugs 42 0.07 0.64 0.34 -1.70