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CMO Letter to Reduce Unnecessary Antibiotic Prescribing and Broad Spectrum Prescribing Winter 2018-9

A Randomized Controlled Trial of Behaviourally Informed Feedback Letters Sent by the Chief Medical Officer on the Amount of Antibiotics and the Percentage of Broad Spectrum Antibiotics Prescribed in Primary Care

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03862794
Acronym
CMO2018-9
Enrollment
7000
Registered
2019-03-05
Start date
2018-11-01
Completion date
2019-05-30
Last updated
2020-03-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Prescribing, Off-Label

Brief summary

This trial aims to reduce unnecessary prescription of antibiotics and broad spectrum antibiotics by general practitioners (GPs) in England. Unnecessary prescriptions are defined as those that do not improve patient health outcomes. The intervention is to send GPs a letter from the Chief Medical Officer (CMO) that gives feedback on their practice's prescribing levels. Specifically the sample was GPs whose practices whose prescribed more than 1.161 items per STAR-PU or whose practices prescribed more that .965 items per STAR-PU and greater than 10% broad spectrum items. The intervention groups received a letter telling them they are among the highest prescribers of either their total or broad spectrum antibiotics, with a graph showing their prescribing compared to average prescribing (their peers). The letter also contained a leaflet to help GPs discuss self-care advice with patients and some advice to use delayed prescriptions. The investigators hypothesize that the antibiotic prescribing rate in will be lower for the treatment group compared to the control group, following the receipt of the letter.

Interventions

BEHAVIORALnew social norm feedback letter with bar chart

letter with the percentile prescribing the practice is on and a bar chart, comparing prescribing to the national average

BEHAVIORALstandard social norm feedback letter

social norm feedback letter used as standard practice, without specific information about the prescribing percentile

Sponsors

Public Health England
Lead SponsorOTHER_GOV

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
OTHER
Masking
NONE

Eligibility

Sex/Gender
ALL
Healthy volunteers
Yes

Inclusion criteria

* GP practices that prescribed more than 1.161 Antibacterial Items/STAR-PU for the twelve months (June 2017 - May 2018) * GP practices that prescribed more than 0.965 Antibacterial Items/STAR-PU and also more than 10% broad spectrum items for the twelve months (June 2017 - May 2018).

Exclusion criteria

* none

Design outcomes

Primary

MeasureTime frameDescription
total antibiotic prescribing weighted by Specific Therapeutic group Age-sex Related Prescribing Unit (STAR-PU) in November for each GP practice1 monthantibiotic prescribing weighted by Specific Therapeutic group Age-sex Related Prescribing Unit (STAR-PU)
total broad spectrum antibiotic prescribing weighted by STAR-PU in November for each GP practice1 monthbroad spectrum antibiotic prescribing weighted by Specific Therapeutic group Age-sex Related Prescribing Unit (STAR-PU)
percentage broad spectrum antibiotic prescribing in November for each GP practice1 monthpercentage broad spectrum antibiotic prescribing
total non-broad spectrum antibiotic prescribing weighted by STAR-PU in November for each GP practice1 monthtotal overall antibiotic prescribing minus total broad spectrum antibiotic prescribing
total antibiotic prescribing weighted by STAR-PU in December for each GP practice2 monthsantibiotic prescribing weighted by Specific Therapeutic group Age-sex Related Prescribing Unit (STAR-PU)
total broad spectrum antibiotic prescribing weighted by STAR-PU in December for each GP practice2 months
percentage broad spectrum antibiotic prescribing in December for each GP practice2 months
total non-broad spectrum antibiotic prescribing weighted by STAR-PU in December for each GP practice2 months
total antibiotic prescribing in January weighted by STAR-PU for each GP practice3 months
total broad spectrum antibiotic prescribing weighted by STAR-PU in January for each GP practice3 months
percentage broad spectrum antibiotic prescribing in January for each GP practice3 months
total non-broad spectrum antibiotic prescribing weighted by STAR-PU in January for each GP practice3 months
total antibiotic prescribing weighted by STAR-PU in February for each GP practice4 months
total broad spectrum antibiotic prescribing weighted by STAR-PU in February for each GP practice4 months
percentage broad spectrum antibiotic prescribing in February for each GP practice4 months
total non-broad spectrum antibiotic prescribing weighted by STAR-PU in February for each GP practice4 months
total antibiotic prescribing weighted by STAR-PU in March for each GP practice5 months
total broad spectrum antibiotic prescribing weighted by STAR-PU in March for each GP practice5 months
percentage broad spectrum antibiotic prescribing in March for each GP practice5 months
total non-broad spectrum antibiotic prescribing weighted by STAR-PU in March for each GP practice5 months
total antibiotic prescribing weighted by STAR-PU in April for each GP practice6 months
total broad spectrum antibiotic prescribing weighted by STAR-PU in April for each GP practice6 months
percentage broad spectrum antibiotic prescribing in April for each GP practice6 months
total non-broad spectrum antibiotic prescribing weighted by STAR-PU in April for each GP practice6 months

Countries

United Kingdom

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 12, 2026