Publications by authors named "Charis Marwick"

Background: There is wide variation in antibiotic prescribing across care-homes for older people, with implications for resident outcomes and antimicrobial resistance.

Objective: To quantify variation in antibiotic prescribing and associations with resident, care-home and general practice characteristics.

Design: Population-based analyses using administrative data.

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Objectives: This study aims to examine community antibiotic prescribing across a complete geographical area for people with a positive COVID-19 test across three pandemic waves, and to examine health and demographic factors associated with antibiotic prescribing.

Design: A population-based study using administrative data.

Setting: A complete geographical region within Scotland, UK.

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Article Synopsis
  • The article discusses the importance of linking free-text addresses to unique identifiers in the UK for various digital health analyses, as current tools are insufficient.
  • A new open-source framework utilizing machine learning and fuzzy matching has been proposed, showing improved accuracy and adaptability in linking addresses from health databases to the UPRN database.
  • Testing demonstrated high matching accuracy and robustness against errors, making it a suitable solution for real-world applications in health and social care resource distribution.
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Introduction: The objective of this study was to examine the evolution of carbapenem-resistant Klebsiella pneumoniae (CRKp) infections and their impact at a tertiary care hospital in South India.

Methods: A comparative analysis of clinical data from two prospective cohorts of patients with CRKp bacteremia (C1, 2014-2015; C2, 2021-2022) was carried out. Antimicrobial susceptibilities and whole genome sequencing (WGS) data of selected isolates were also analyzed.

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Background: Measuring sepsis incidence and associated mortality at scale using administrative data is hampered by variation in diagnostic coding. This study aimed first to compare how well bedside severity scores predict 30-day mortality in hospitalised patients with infection, then to assess the ability of combinations of administrative data items to identify patients with sepsis.

Methods: This retrospective case note review examined 958 adult hospital admissions between October 2015 and March 2016.

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In recent times, discovery efforts for novel antibiotics have mostly targeted carbapenemase-producing Gram-negative organisms. Two different combination approaches are pertinent: β-lactam-β-lactamase inhibitor (BL/BLI) or β-lactam-β-lactam enhancer (BL/BLE). Cefepime combined with a BLI, taniborbactam, or with a BLE, zidebactam, has been shown to be promising.

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Objectives: To evaluate the effect of general practice-level prescribing feedback on antibiotic prescribing in a real-world pragmatic cluster randomized controlled trial.

Methods: Three hundred and forty general practices in four territorial Health Boards in NHS Scotland were randomized in Quarter 1, 2016 to receive four quarterly antibiotic-prescribing feedback reports or not, from Quarter 2, 2016 to Quarter 1, 2017. Reports included different clinical topics, benchmarking against national and health board rates, and behavioural messaging with improvement actions.

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Background: Potentially inappropriate prescribing (PIP) of asthma bronchodilator inhalers is associated with increased morbidity and mortality.

Aim: To evaluate the effectiveness of feedback on the PIP of bronchodilator inhalers.

Design And Setting: Pragmatic cluster randomised trial involving 235 of 244 (96.

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Background: Reducing antibiotic use is central to antimicrobial stewardship, but may have unintended consequences.

Objectives: To examine associations between size of decline in antibiotic prescriptions in general practices and (i) rate of hospitalization for infection and (ii) patient satisfaction.

Methods: Routine data analysis for all general practices in Scotland, quarter one 2012 (Q1 2012) to quarter one 2018 (Q1 2018).

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Article Synopsis
  • Care home residents are prone to excessive polypharmacy (taking 10 or more medications), with a prevalence of 32.3%, particularly in those aged 70-84 and living in residential care homes.
  • Certain factors influence this trend, such as age and location, while those with dementia tend to have lower rates of excessive polypharmacy.
  • Common inappropriate prescribing practices have been identified, especially in drugs leading to issues like constipation, sedation, and renal injury, highlighting the need for improved prescribing safety in care homes.
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Background: older people living in care-homes are particularly vulnerable to adverse effects of psychotropic and anticholinergic drugs.

Methods: anonymised dispensed prescription data from all 4,478 residents aged ≥ 60 years in 147 care-homes in two Scottish health boards were analysed. Psychotropic medicines examined were antipsychotics, antidepressants, hypnotic/anxiolytics, opioids and gabapentinoids.

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  • The study analyzed infective endocarditis trends in Scotland from 1990 to 2014, finding no significant changes in incidence after national antibiotic prophylaxis guidelines were updated in 2008.
  • Hospitalizations increased initially but stabilized thereafter, with a notable rise in incidence among patients over 80 years.
  • Despite higher hospitalization rates, the one-year case fatality rates decreased for both sexes, indicating improved outcomes over the study period.
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  • Hospitals need to stop giving antibiotics when they aren't really needed to prevent bacteria from becoming resistant to them.
  • A study looked at how well hospitals were doing this by checking if the right people knew what to do and when to do it.
  • They found that while some details were clear about what should happen, there was confusion about who should take action and when, making it harder for hospitals to improve their practices.
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Background: Primary care antimicrobial stewardship interventions can improve antimicrobial prescribing, but there is less evidence that they reduce rates of resistant infection. This study examined changes in broad-spectrum antimicrobial prescribing in the community and resistance in people admitted to hospital with community-associated coliform bacteraemia associated with a primary care stewardship intervention.

Methods And Findings: Segmented regression analysis of data on all patients registered with a general practitioner in the National Health Service (NHS) Tayside region in the east of Scotland, UK, from 1 January 2005 to 31 December 2015 was performed, examining associations between a primary care antimicrobial stewardship intervention in 2009 and primary care prescribing of fluoroquinolones, cephalosporins, and co-amoxiclav and resistance to the same three antimicrobials/classes among community-associated coliform bacteraemia.

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The increasing clinical importance of human infections (frequently severe) caused by PCR ribotype 078 (RT078) was first reported in 2008. The severity of symptoms (mortality of ≤30%) and the higher proportion of infections among community and younger patients raised concerns. Farm animals, especially pigs, have been identified as RT078 reservoirs.

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Background: Nonsteroidal anti-inflammatory drugs (NSAIDs) provide effective analgesia during the post-operative period but can cause acute kidney injury (AKI) when used peri-operatively (at or around the time of surgery). This is an update of a Cochrane review published in 2007.

Objectives: This review looked at the effect of NSAIDs used in the peri-operative period on post-operative kidney function in patients with normal kidney function.

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Background: there is no established method to identify care-home residents in routine healthcare datasets. Methods matching patient's addresses to known care-home addresses have been proposed in the UK, but few have been formally evaluated.

Study Design: prospective diagnostic test accuracy study.

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Background: Development of acute kidney injury (AKI) following the use of antibiotics such as sulphonamides, trimethoprim and aminoglycosides is a frequently described phenomenon. More recently, an association between fluoroquinolone use and AKI has been suggested. The aim of this study was to evaluate the risk of AKI as an unintended consequence of commonly prescribed antibiotics in a large community cohort using a method that fully adjusts for underlying patient characteristics, including potential unmeasured confounders.

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Background: Antimicrobial exposure is associated with increased risk of Clostridium difficile infection (CDI), but the impact of prescribing interventions on CDI and other outcomes is less clear.

Objectives: To evaluate the effect of an antimicrobial stewardship intervention targeting high-risk antimicrobials (HRA), implemented in October 2008, and to compare the findings with similar studies from a systematic review.

Methods: All patients admitted to Medicine and Surgery in Ninewells Hospital from October 2006 to September 2010 were included.

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Objectives: To elucidate how population trends in total antimicrobials dispensed in the community translate into individual exposure.

Methods: Retrospective, population-based observational study of all antimicrobial prescribing in a Scottish region in financial years 1995, 2000 and 2005-14. Analysis of temporal changes in all antimicrobials and specific antimicrobials measured in: WHO DDD per 1000 population; prescriptions per 1000 population; proportion of population with ≥1 prescription; mean number of prescriptions per person receiving any; mean DDD per prescription.

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Background: The better use of new and emerging data streams to understand the epidemiology of infectious disease and to inform and evaluate antimicrobial stewardship improvement programmes is paramount in the global fight against antimicrobial resistance.

Objectives: To create a national informatics platform that synergizes the wealth of disjointed, infection-related health data, building an intelligence capability that allows rapid enquiry, generation of new knowledge and feedback to clinicians and policy makers.

Methods: A multi-stakeholder community, led by the Scottish Antimicrobial Prescribing Group, secured government funding to deliver a national programme of work centred on three key aspects: (i) technical platform development with record linkage capability across multiple datasets; (ii) a proportionate governance approach to enhance responsiveness; and (iii) generation of new evidence to guide clinical practice.

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Background: Urinary tract infections (UTIs) are common. Antibiotic treatment is usually empirical, with the risk of under-treatment of resistant infections.

Objectives: To characterize risk factors for antibiotic-resistant community urine isolates using routine record-linked health data.

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Drawing on a Cochrane systematic review, this paper examines the relatively limited range of outcomes measured in published evaluations of antimicrobial stewardship interventions (ASIs) in hospitals. We describe a structured framework for considering the range of consequences that ASIs can have, in terms of their desirability and the extent to which they were expected when planning an ASI: expected, desirable consequences (intervention goals); expected, undesirable consequences (intervention trade-offs); unexpected, undesirable consequences (unpleasant surprises); and unexpected, desirable consequences (pleasant surprises). Of 49 randomized controlled trials identified by the Cochrane review, 28 (57%) pre-specified increased length of stay and/or mortality as potential trade-offs of ASI, with measurement intended to provide reassurance about safety.

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