Peritonsillar Abscess and Antibiotic Prescribing for Respiratory Infection in Primary Care: A Population-Based Cohort Study and Decision-Analytic Model.
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ABSTRACT: Purpose
To quantify the risk of peritonsillar abscess (PTA) following consultation for respiratory tract infection (RTI) in primary care.Method
A cohort study was conducted in the UK Clinical Practice Research Datalink including 718 general practices with 65,681,293 patient years of follow-up and 11,007 patients with a first episode of PTA. From a decision tree, Bayes theorem was employed to estimate both the probability of PTA following an RTI consultation if antibiotics were prescribed or not, and the number of patients needed to be treated with antibiotics to prevent 1 PTA.Results
There were 11,007 patients with PTA with age-standardized incidence of new episodes of PTA of 17.2 per 100,000 patient years for men and 16.1 for women; 6,996 (64%) consulted their practitioner in the 30 days preceding PTA diagnosis, including 4,243 (39%) consulting for RTI. The probability of PTA following an RTI consultation was greatest in men aged 15 to 24 years with 1 PTA in 565 (95% uncertainty interval 527 to 605) RTI consultations without antibiotics prescribed but 1 in 1,139 consultations (1,044 to 1,242) if antibiotics were prescribed. One PTA might be avoided for every 1,121 (975 to 1,310) additional antibiotic prescriptions for men aged 15 to 24 years and 926 (814 to 1,063) for men aged 25 to 34 years. The risk of PTA following RTI consultation was smaller and the number needed to treat higher at other ages and risks were lower in women than men.Conclusions
The risk of PTA may be lower if antibiotics are prescribed for RTI but even in young men nearly 1,000 antibiotic prescriptions may be required to prevent 1 PTA case. We caution that lack of randomization and data standardization may bias estimates.
SUBMITTER: Winter JR
PROVIDER: S-EPMC7489966 | biostudies-literature |
REPOSITORIES: biostudies-literature
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Project description:ObjectiveThere are no consensus guidelines for managing peritonsillar abscess (PTA) despite its prevalence. In order to devise best practice guidelines, current practice patterns must first be established.MethodsThis was a cross-sectional study, surveying Otolaryngology-Head & Neck Surgery trainees (residents and fellows) and consultant (academic and community). The primary outcome was the type and duration of outpatient antibiotic prescription. Secondary outcomes included differences in workup, management, prescription, and follow-up.ResultsThere were 57 respondents to the survey; 24 (42%) trainees (residents/fellows) and 33 (58%) consultants. On average, each respondent managed an average of 15.2 (SD 11.2) PTAs within the last year. All respondents prescribed oral antibiotics, with amoxicillin-clavulanic acid being the most common (61%). Trainees prescribed amoxicillin-clavulanic acid more often than consultants (n = 21, 88% vs n = 14, 42%, P = .0084), respectively. Duration of antibiotic therapy ranged from 5 to 14 days. Most commonly, a 10-day course of antibiotics was prescribed (n = 31, 54%). Regarding the management of PTAs, a majority of respondents requested blood work (n = 39, 68%), performed needle aspiration (n = 42, 72%) and performed incision and drainage (n = 52, 91%). Culture and sensitivity of the aspirate/drainage fluid was frequently performed (n = 41, 72%). Patients were often provided non-opioid analgesics (n = 46, 81%), but more than half still received prescription opioids (n = 36, 63%). The majority of clinicians arranged for follow-up (n = 42, 74%), most often with Otolaryngology - Head & Neck Surgery (n = 27, 64%), with an average follow-up of 12.5 (SD 8.2) days.ConclusionWe found heterogeneity in the management of PTAs, with variability in the outpatient antibiotic prescription. This study highlighted the wide range of management strategies employed along with differences in workup, investigation, post-discharge analgesic prescription, and follow-up arrangements.Level of evidence5.
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Project description:ObjectivesTo evaluate the effectiveness and safety at population scale of electronically delivered prescribing feedback and decision support interventions at reducing antibiotic prescribing for self limiting respiratory tract infections.DesignOpen label, two arm, cluster randomised controlled trial.SettingUK general practices in the Clinical Practice Research Datalink, randomised between 11 November 2015 and 9 August 2016, with final follow-up on 9 August 2017.Participants79 general practices (582 675 patient years) randomised (1:1) to antimicrobial stewardship (AMS) intervention or usual care.InterventionsAMS intervention comprised a brief training webinar, automated monthly feedback reports of antibiotic prescribing, and electronic decision support tools to inform appropriate prescribing over 12 months. Intervention components were delivered electronically, supported by a local practice champion nominated for the trial.Main outcome measuresPrimary outcome was the rate of antibiotic prescriptions for respiratory tract infections from electronic health records. Serious bacterial complications were evaluated for safety. Analysis was by Poisson regression with general practice as a random effect, adjusting for covariates. Prespecified subgroup analyses by age group were reported.ResultsThe trial included 41 AMS practices (323 155 patient years) and 38 usual care practices (259 520 patient years). Unadjusted and adjusted rate ratios for antibiotic prescribing were 0.89 (95% confidence interval 0.68 to 1.16) and 0.88 (0.78 to 0.99, P=0.04), respectively, with prescribing rates of 98.7 per 1000 patient years for AMS (31 907 prescriptions) and 107.6 per 1000 patient years for usual care (27 923 prescriptions). Antibiotic prescribing was reduced most in adults aged 15-84 years (adjusted rate ratio 0.84, 95% confidence interval 0.75 to 0.95), with one antibiotic prescription per year avoided for every 62 patients (95% confidence interval 40 to 200). There was no evidence of effect for children younger than 15 years (adjusted rate ratio 0.96, 95% confidence interval 0.82 to 1.12) or people aged 85 years and older (0.97, 0.79 to 1.18); there was also no evidence of an increase in serious bacterial complications (0.92, 0.74 to 1.13).ConclusionsElectronically delivered interventions, integrated into practice workflow, result in moderate reductions of antibiotic prescribing for respiratory tract infections in adults, which are likely to be of importance for public health. Antibiotic prescribing to very young or old patients requires further evaluation.Trial registrationISRCTN95232781.
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Project description:Inappropriate antibiotic use is a key factor in the emergence of antibiotic resistance. The majority of antibiotics are prescribed in primary care, where upper respiratory tract infection (URTI) is a common presentation. Inappropriate antibiotic prescribing in URTI is common globally and has increased markedly in developing and transitional countries. Antibiotic stewardship is crucial to prevent the emergence and spread of resistant microbes. This project aimed to reduce inappropriate antibiotic prescribing in URTI in a non-governmental organisation's primary care outreach clinics in Kolkata, India, from 62.6% to 30% over 4?months. A multifaceted intervention to reduce inappropriate antibiotic use in non-specific URTI was implemented. This consisted of a repeated process of audit and feedback, interactive training sessions, one-to-one case-based discussion, antibiotic guideline development and coding updates. The primary outcome measure was antibiotic prescribing rates. A baseline audit of all patients presenting with non-specific URTI over 8?weeks in November and December 2016 (n=222) found that 62.6% were prescribed antibiotics. Postintervention audit over 4?weeks in April 2017 (n=69) showed a marked reduction in antibiotic prescribing to 7.2%. An increase in documentation of examination findings was also observed, from 52.7% to 95.6%. This multifaceted intervention was successful at reducing inappropriate antibiotic prescribing, with sustained reductions demonstrated over the 4?months of the project. This suggests that approaches previously used in Europe can successfully be applied to different settings.
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Project description:ObjectiveTo estimate the effectiveness of different strategies involving delayed antibiotic prescription for acute respiratory tract infections.DesignOpen, pragmatic, parallel group, factorial, randomised controlled trial.SettingPrimary care in the United Kingdom.Patients889 patients aged 3 years and over with acute respiratory tract infection, recruited between 3 March 2010 and 28 March 2012 by 53 health professionals in 25 practices.InterventionsPatients judged not to need immediate antibiotics were randomised to undergo four strategies of delayed prescription: recontact for a prescription, post-dated prescription, collection of the prescription, and be given the prescription (patient led). During the trial, a strategy of no antibiotic prescription was added as another randomised comparison. Analysis was intention to treat.Main outcome measuresMean symptom severity (0-6 scale) at days 2-4 (primary outcome), antibiotic use, and patients' beliefs in the effectiveness of antibiotic use. Secondary analysis included comparison with immediate use of antibiotics.ResultsMean symptom severity had minimal differences between the strategies involving no prescription and delayed prescription (recontact, post-date, collection, patient led; 1.62, 1.60, 1.82, 1.68, 1.75, respectively; likelihood ratio test χ(2) 2.61, P=0.625). Duration of symptoms rated moderately bad or worse also did not differ between no prescription and delayed prescription strategies combined (median 3 days v 4 days; 4.29, P=0.368). There were modest and non-significant differences in patients very satisfied with the consultation between the randomised groups (79%, 74%, 80%, 88%, 89%, respectively; likelihood ratio test χ(2) 2.38, P=0.667), belief in antibiotics (71%, 74%, 73%, 72%, 66%; 1.62, P=0.805), or antibiotic use (26%, 37%, 37%, 33%, 39%; 4.96, P=0.292). By contrast, most patients given immediate antibiotics used antibiotics (97%) and strongly believed in them (93%), but with no benefit for symptom severity (score 1.76) or duration (median 4 days).ConclusionStrategies of no prescription or delayed antibiotic prescription result in fewer than 40% of patients using antibiotics, and are associated with less strong beliefs in antibiotics, and similar symptomatic outcomes to immediate prescription. If clear advice is given to patients, there is probably little to choose between the different strategies of delayed prescription.Trial registrationISRCTN38551726.
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Project description:BackgroundReducing inappropriate antibiotic prescribing in primary care is a public health priority.ObjectivesWe hypothesized that a subset of patients account for the majority of antibiotic prescriptions in primary care. We investigated the relationship between the total amount of antibiotics prescribed, individual-level antibiotic use and comorbidity.MethodsThis was a cohort study using electronic health records from 1?948?390 adults registered with 385 primary care practices in the UK in 2011-13. We estimated the average number of antibiotic prescriptions per patient and the association between prescribing and comorbidity. We modelled the impact on total prescribing of reducing antibiotic use in those prescribed antibiotics most frequently.ResultsOn average 30.1% (586?194/1?948?390) of patients were prescribed at least one antibiotic per year. Nine percent (174?602/1?948?390) of patients were prescribed 53% (2?091?496/3?922?732) of the total amount of antibiotics, each of whom received at least five antibiotic prescriptions over 3?years. The presence of any comorbidity increased the prescribing rate by 44% [adjusted incidence rate ratio (IRR) 1.44, 95% CI 1.43-1.45]; rates of prescribing to women exceeded those in men by 62% (adjusted IRR 1.62, 95% CI 1.62-1.63).ConclusionsHalf of antibiotics prescribed to adults in primary care were for <10% of patients. Efforts to tackle antimicrobial resistance should consider the impact of this on total prescribing.
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