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  • Conference paper
    Kallis C, Morgan AD, Maslova E, van der Valk R, Tran TN, Sinha I, Roberts G, Quint JKet al., 2022,

    Sabina Jr UK: The Association Between Saba (Short-Acting Beta Agonist) Prescriptions and Frequency of Asthma Exacerbations in a Paediatric Cohort

    , International Conference of the American-Thoracic-Society, Publisher: AMER THORACIC SOC, ISSN: 1073-449X
  • Journal article
    Wood JL, Kallis C, Coid JW, 2022,

    Gang Members, Gang Affiliates, and Violent Men: Perpetration of Social Harms, Violence-Related Beliefs, Victim Types, and Locations

    , JOURNAL OF INTERPERSONAL VIOLENCE, Vol: 37, Pages: NP3703-NP3727, ISSN: 0886-2605
  • Journal article
    Whittaker H, Rubino A, Mullerova H, Morris T, Varghese P, Xu Y, De Nigris E, Quint JKet al., 2022,

    Frequency and severity of exacerbations of COPD associated with future Risk of exacerbations and mortality: A UK routine health care data study

    , The International Journal of Chronic Obstructive Pulmonary Disease, Vol: 17, Pages: 427-437, ISSN: 1176-9106

    Background: Studies have shown that chronic obstructive pulmonary disease (COPD) exacerbation events are related to future events; however, previous literature typically reports frequent vs infrequent exacerbations per patient-year and no studies have investigated increasing number of severe exacerbations in relation to COPD outcomes.Objective: To investigate the association between baseline frequency and severity of exacerbations and subsequent mortality and exacerbation risk in a COPD cohort.Methods: Clinical Practice Research Datalink (CPRD) Aurum and Hospital Episode Statistics data were used to identify patients registered at general practices in the UK, who had a diagnosis of COPD, were over the age of 40 years, were smokers or ex-smokers and had data recorded from 2004 onwards. Frequency and severity of exacerbations in the baseline year were identified as moderate exacerbations (general practice events) and severe exacerbations (hospitalised events). Patients were categorised as having: none, 1 moderate only, 2 moderate only, 3+ moderate only, 1 severe (and any moderate), 2 severe (and any moderate), and 3+ severe (and any moderate exacerbations). Poisson regression was used to investigate the association between baseline exacerbation frequency/severity and exacerbation events and mortality over follow-up.Results: Overall, 340,515 COPD patients were included. Patients had higher rates of future exacerbations with increasing frequency and severity of baseline exacerbations compared to no baseline exacerbations. Adjusted incidence rate ratios (IRR) for patients with 1, 2, and 3+ moderate exacerbations compared to 0 exacerbations were 1.70 (95% CI 1.66– 1.74), 2.31 (95% CI 2.24– 2.37), and 3.52 (95% CI 3.43– 3.62), respectively. Patients with increased frequency of baseline exacerbations were more likely to die from all-cause, COPD-related, and cardiovascular-related mortality in a graduated fashion.Conclusion: Increasing number and severity o

  • Journal article
    Cookson W, Moffatt M, Rapeport G, Quint Jet al., 2022,

    A pandemic lesson for global lung diseases: exacerbations are preventable.

    , American Journal of Respiratory and Critical Care Medicine, Vol: 205, Pages: 1271-1280, ISSN: 1073-449X

    A dramatic global reduction in the incidence of common seasonal respiratory viral infections has resulted from measures to limit the transmission of SARS2-Cov-19 during the pandemic . This has been accompanied by falls reaching 50% internationally in the incidence of acute exacerbations of pre-existing chronic respiratory diseases that include asthma, Chronic Obstructive Pulmonary Disease (COPD) and Cystic Fibrosis (CF). At the same time, the incidence of acute bacterial pneumonia and sepsis has fallen steeply world-wide. Such findings demonstrate the profound impact of common respiratory viruses on the course of these global illnesses. Reduced transmission of common respiratory bacterial pathogens and their interactions with viruses appear also as central factors. This review summarises pandemic changes in exacerbation rates of asthma, COPD, Cystic Fibrosis (CF) and pneumonia. We draw attention to the substantial body of knowledge about respiratory virus infections in these conditions, and that it has not yet translated into clinical practice. Now the large-scale of benefits that could be gained by managing these pathogens is unmistakable, we suggest the field merits substantial academic and industrial investment. We consider how pandemic-inspired measures for prevention and treatment of common infections should become a cornerstone for managing respiratory diseases. This article is open access and distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives License 4.0 (http://creativecommons.org/licenses/by-nc-nd/4.0/).

  • Journal article
    MacRae C, Whittaker H, Mukherjee M, Daines L, Morgan A, Iwundu C, Alsallakh M, Vasileiou E, O'Rourke E, Williams A, Stone P, Sheikh A, Quint Jet al., 2022,

    Deriving a standardised recommended respiratory disease codelist repository for future research

    , Pragmatic and Observational Research, Vol: 13, ISSN: 1179-7266

    Background: Electronic health record (EHR) databases provide rich, longitudinal data on interactions with healthcare providers, and can be used to advance research into respiratory conditions. However, since these data are primarily collected to support health care delivery, clinical coding can be inconsistent, resulting in inherent challenges in using these data for research purposes.Methods: We systematically searched existing international literature and UK code repositories to find respiratory disease codelists for asthma from January 2018, and chronic obstructive pulmonary disease 1 and respiratory tract infections from January 2020, based on prior searches. Medline searches using key terms provided article lists. Full-text articles, supplementary files, and reference lists were examined for codelists, and codelists repositories were searched. A reproducible methodology for codelists creation was developed with recommended lists for each disease created based on multidisciplinary expert opinion and previously published literature. Results: Medline searches returned 1,126 asthma articles, 70 COPD articles, and 90 respiratory infection articles, with 3%, 22% and 5% including codelists, respectively. Repository searching returned 12 asthma, 23 COPD, and 64 respiratory infection codelists. We have systematically compiled respiratory disease codelists and from these derived recommended lists for use by researchers to find the most up-to-date and relevant respiratory disease codelists that can be tailored to individual research questions. Conclusions: Few published papers include codelists, and where published diverse codelists were used, even when answering similar research questions. Whilst some advances have been made. greater consistency and transparency across studies using routine data to study respiratory diseases are needed.

  • Journal article
    Whittaker H, Gulea C, Koteci A, Kallis C, Morgan A, Iwundu C, Weeks M, Gupta R, Quint Jet al., 2021,

    GP consultation rates for post-acute COVID-19 sequelae in cases managed in the community or hospital in the UK: a population-based study

    , BMJ: British Medical Journal, Vol: 375, Pages: 1-13, ISSN: 0959-535X

    ObjectiveTo describe GP consultation rates for post-COVID-19 sequelae in non-hospitalised and hospitalised COVID-19 patients, and among non-hospitalised individuals describe how GP consultation rates for post-COVID-19 sequelae change over time, as well as following COVID-19 vaccination. DesignPopulation-based cohort study.Setting1,392 general practices in England contributing to the Clinical Practice Research Datalink Aurum database.Participants456,002 COVID-19 cases diagnosed between 1st August 2020 to 14th February2021 (44.7% male; median age 61 years), either hospitalised within two weeks of diagnosis or not hospitalised and followed-up for a maximum of 9.2 months. A negative control group of individuals without COVID-19 (N=38,511) and patients with influenza before the pandemic (N=21,803) were used to contextualise findings.Main outcome measuresComparison of GP consultation rates for new symptoms, diseases, prescriptions and healthcare utilisation (HCU) in hospitalised and non-hospitalised individuals separately pre and post-COVID-19 infection using Cox regression and negative binomial regression for HCU. This was repeated for the negative control and influenza cohorts. In non-hospitalised individuals, outcomes were additionally described over time following COVID-19 diagnosis and compared pre and post-COVID-19 vaccine in individuals who were symptomatic post-COVID-19, using negative binomial regression. Results Relative to the negative control and influenza cohorts non-hospitalised patients (N=437,943) had significantly higher GP consultation rates for multiple sequelae, the most common being loss of smell/taste (HRadj 5.28 [95%CI 3.89 to 7.17]; p<0.001), venous thromboembolism (VTE) (3.35 [2.87 to 3.90]; p<0.001), lung fibrosis (2.41 [1.37 to 4.25]; p=0.002), and muscle pain (1.89 [1.6 3to 2.20]; p<0.001), as well as HCU post COVID-19 diagnosis compared with 1-year prior. In terms of absolute proportions, the most common outcomes ≥ 4-weeks post-CO

  • Journal article
    Razanskaite V, Kallis C, Young B, Williamson PR, Bodger Ket al., 2021,

    Heterogeneity in outcome assessment for inflammatory bowel disease in routine clinical practice: a mixed-methods study in a sample of English hospitals

    , BMJ OPEN, Vol: 11, ISSN: 2044-6055
  • Journal article
    Buttery S, Philip K, Williams P, Fallas A, West B, Curnella A, Walker S, Quint J, Polkey M, Hopkinson Net al., 2021,

    Patient symptoms and experience following COVID-19: results from a UK-wide survey

    , BMJ Open Respiratory Research, Vol: 8, ISSN: 2052-4439

    Objectives: To investigate the experience of people who continue to be unwell after acute COVID-19, often referred to as ‘long COVID’, both in terms of their symptoms and their interactions with healthcare.Design: We conducted a mixed-methods analysis of responses to a survey accessed through a UK online post-COVID support and information hub between April and December 2020 about people’s experiences after having acute COVID-19.Participants: 3290 respondents, 78% female 92.1% white ethnicity and median age range 45-54 years; 12.7% had been hospitalised. 494(16.5%) completed the survey between 4 and 8 weeks of the onset of their symptoms, 641(21.4%) between 8 and 12 weeks and 1865(62.1%) >12 weeks after.Results: The ongoing symptoms most frequently reported were; breathing problems (92.1%), fatigue (83.3%), muscle weakness or joint stiffness (50.6%), sleep disturbances (46.2%), problems with mental abilities (45.9%) changes in mood, including anxiety and depression (43.1%) and cough (42.3%). Symptoms did not appear to be related to the severity of the acute illness or to the presence of pre-existing medical conditions. Analysis of free text responses revealed three main themes (1) Experience of living with COVID-19 – physical and psychological symptoms that fluctuate unpredictably; (2) Interactions with healthcare that were unsatisfactory; (3) Implications for the future – their own condition, society and the healthcare system, and the need for researchConclusion: Consideration of patient perspective and experiences will assist in the planning of services to address problems persisting in people who remain symptomatic after the acute phase of COVID-19.

  • Journal article
    Dixon P, Kallis C, Grainger R, Pearson MG, Tudur-Smith C, Marson AGet al., 2021,

    Care After Presenting with Seizures (CAPS): An analysis of the impact of a seizure referral pathway and nurse support on neurology referral rates for patients admitted with a seizure

    , SEIZURE-EUROPEAN JOURNAL OF EPILEPSY, Vol: 92, Pages: 18-23, ISSN: 1059-1311
  • Conference paper
    Koteci A, Morgan AD, Whittaker HR, Portas L, George PM, Quint JKet al., 2021,

    INCIDENCE AND PREVALENCE OF LEFT-SIDED HEART FAILURE IN PATIENTS WITH IDIOPATHIC PULMONARY FIBROSIS: A POPULATION-BASED STUDY

    , Publisher: BMJ PUBLISHING GROUP, Pages: A148-A149, ISSN: 0040-6376

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