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HEALTH SERVICES AND DELIVERY RESEARCH VOLUME 5 ISSUE 7 FEBRUARY 2017 ISSN 2050-4349 Elective hospital admissions: secondary data analysis and modelling with an emphasis on policies to moderate growth Martin Chalkley, Barry McCormick, Robert Anderson, Maria Jose Aragon, Nazma Nessa, Catia Nicodemo, Stuart Redding and Raphael Wittenberg DOI 10.3310/hsdr05070 Elective hospital admissions: secondary data analysis and modelling with an emphasis on policies to moderate growth Martin Chalkley,1 Barry McCormick,2* Robert Anderson,2 Maria Jose Aragon,1 Nazma Nessa,2,3 Catia Nicodemo,2 Stuart Redding2 and Raphael Wittenberg2 1Centre for Health Economics, University of York, York, UK 2Centre for Health Service Economics and Organisation, Nuffield Department of Primary Care, University of Oxford, Oxford, UK 3Department for Business, Innovation and Skills, London, UK *Corresponding author Declared competing interests of authors: Maria JoseAragon reports grants from theNational Institute for Health Research (NIHR) during the conductof thestudy, grantsfrom theDepartment of Health, grants from theDepartment of Health via Economics of Social and Health Care Research Unit (ESCHCRU), grants from theWellcome Trust via theCentre for Chronic Diseases and Disorders(C2D2) and grants from NHS England outsidethe submitted work. Martin Chalkley reports grantsfrom NIHR during theconduct of the study, grants from theDepartment of Health, grants from ESCHCRU, grants from C2D2 and grants from NHS England outside thesubmitted work. Published February 2017 DOI: 10.3310/hsdr05070 This reportshould be referenced as follows: ChalkleyM, McCormick B, Anderson R, Aragon MJ, NessaN, NicodemoC, et al.Elective hospital admissions: secondary dataanalysis and modelling with anemphasis onpolicies to moderate growth. Health Serv Deliv Res2017;5(7). Health Services and Delivery Research ISSN2050-4349(Print) ISSN2050-4357(Online) ThisjournalisamemberofandsubscribestotheprinciplesoftheCommitteeonPublicationEthics(COPE)(www.publicationethics.org/). Editorialcontact:[email protected] ThefullHS&DRarchiveisfreelyavailabletoviewonlineatwww.journalslibrary.nihr.ac.uk/hsdr.Print-on-demandcopiescanbepurchasedfrom thereportpagesoftheNIHRJournalsLibrarywebsite:www.journalslibrary.nihr.ac.uk CriteriaforinclusionintheHealthServicesandDeliveryResearchjournal ReportsarepublishedinHealthServicesandDeliveryResearch(HS&DR)if(1)theyhaveresultedfromworkfortheHS&DRprogramme orprogrammeswhichprecededtheHS&DRprogramme,and(2)theyareofasufficientlyhighscientificqualityasassessedbythe reviewersandeditors. HS&DRprogramme TheHealthServicesandDeliveryResearch(HS&DR)programme,partoftheNationalInstituteforHealthResearch(NIHR),wasestablishedto fundabroadrangeofresearch.ItcombinesthestrengthsandcontributionsoftwopreviousNIHRresearchprogrammes:theHealthServices Research(HSR)programmeandtheServiceDeliveryandOrganisation(SDO)programme,whichweremergedinJanuary2012. TheHS&DRprogrammeaimstoproducerigorousandrelevantevidenceonthequality,accessandorganisationofhealthservicesincluding costsandoutcomes,aswellasresearchonimplementation.Theprogrammewillenhancethestrategicfocusonresearchthatmatterstothe NHSandiskeentosupportambitiousevaluativeresearchtoimprovehealthservices. FormoreinformationabouttheHS&DRprogrammepleasevisitthewebsite:http://www.nets.nihr.ac.uk/programmes/hsdr Thisreport TheresearchreportedinthisissueofthejournalwasfundedbytheHS&DRprogrammeoroneofitsprecedingprogrammesasproject number11/1022/19.ThecontractualstartdatewasinJanuary2013.ThefinalreportbeganeditorialreviewinJanuary2016andwas acceptedforpublicationinAugust2016.Theauthorshavebeenwhollyresponsibleforalldatacollection,analysisandinterpretation,andfor writinguptheirwork.TheHS&DReditorsandproductionhousehavetriedtoensuretheaccuracyoftheauthors’reportandwouldliketo thankthereviewersfortheirconstructivecommentsonthefinalreportdocument.However,theydonotacceptliabilityfordamagesorlosses arisingfrommaterialpublishedinthisreport. ThisreportpresentsindependentresearchfundedbytheNationalInstituteforHealthResearch(NIHR).Theviewsandopinionsexpressedby authorsinthispublicationarethoseoftheauthorsanddonotnecessarilyreflectthoseoftheNHS,theNIHR,NETSCC,theHS&DR programmeortheDepartmentofHealth.Ifthereareverbatimquotationsincludedinthispublicationtheviewsandopinionsexpressedbythe intervieweesarethoseoftheintervieweesanddonotnecessarilyreflectthoseoftheauthors,thoseoftheNHS,theNIHR,NETSCC,the HS&DRprogrammeortheDepartmentofHealth. ©Queen’sPrinterandControllerofHMSO2017.ThisworkwasproducedbyChalkleyetal.underthetermsofacommissioning contractissuedbytheSecretaryofStateforHealth.Thisissuemaybefreelyreproducedforthepurposesofprivateresearchand studyandextracts(orindeed,thefullreport)maybeincludedinprofessionaljournalsprovidedthatsuitableacknowledgement ismadeandthereproductionisnotassociatedwithanyformofadvertising.Applicationsforcommercialreproductionshouldbe addressedto:NIHRJournalsLibrary,NationalInstituteforHealthResearch,Evaluation,TrialsandStudiesCoordinatingCentre, AlphaHouse,UniversityofSouthamptonSciencePark,SouthamptonSO167NS,UK. PublishedbytheNIHRJournalsLibrary(www.journalslibrary.nihr.ac.uk),producedbyPrepressProjectsLtd,Perth,Scotland (www.prepress-projects.co.uk). Health Services and Delivery Research Editor-in-Chief Professor Jo Rycroft-Malone Professor of Health Services and Implementation Research, Bangor University, UK NIHR Journals Library Editor-in-Chief Professor Tom Walley Director, NIHR Evaluation, Trials and Studies and Director of the EME Programme, UK NIHR Journals Library Editors Professor Ken Stein Chair of HTA Editorial Board and Professor of Public Health, University of Exeter Medical School, UK Professor Andree Le May Chair of NIHR Journals Library Editorial Group (EME, HS&DR, PGfAR, PHR journals) Dr Martin Ashton-Key Consultant in Public Health Medicine/Consultant Advisor, NETSCC, UK Professor Matthias Beck Chair in Public Sector Management and Subject Leader (Management Group), Queen’s University Management School, Queen’s University Belfast, UK Professor Aileen Clarke Professor of Public Health and Health Services Research, Warwick Medical School, University of Warwick, UK Dr Tessa Crilly Director, Crystal Blue Consulting Ltd, UK Dr Eugenia Cronin Senior Scientific Advisor, Wessex Institute, UK Ms Tara Lamont Scientific Advisor, NETSCC, UK Professor William McGuire Professor of Child Health, Hull York Medical School, University of York, UK Professor Geoffrey Meads Professor of Health Sciences Research, Health and Wellbeing Research Group, University of Winchester, UK Professor John Norrie Chair in Medical Statistics, University of Edinburgh, UK Professor John Powell Consultant Clinical Adviser, National Institute for Health and Care Excellence (NICE), UK Professor James Raftery Professor of Health Technology Assessment, Wessex Institute, Faculty of Medicine, University of Southampton, UK Dr Rob Riemsma Reviews Manager, Kleijnen Systematic Reviews Ltd, UK Professor Helen Roberts Professor of Child Health Research, UCL Institute of Child Health, UK Professor Jonathan Ross Professor of Sexual Health and HIV, University Hospital Birmingham, UK Professor Helen Snooks Professor of Health Services Research, Institute of Life Science, College of Medicine, Swansea University, UK Professor Jim Thornton Professor of Obstetrics and Gynaecology, Faculty of Medicine and Health Sciences, University of Nottingham, UK Professor Martin Underwood Director, Warwick Clinical Trials Unit, Warwick Medical School, University of Warwick, UK Please visit the website for a list of members of the NIHR Journals Library Board: www.journalslibrary.nihr.ac.uk/about/editors Editorial contact: [email protected] NIHRJournalsLibrary www.journalslibrary.nihr.ac.uk DOI:10.3310/hsdr05070 HEALTHSERVICESANDDELIVERYRESEARCH2017 VOL.5 NO.7 Abstract Elective hospital admissions: secondary data analysis and modelling with an emphasis on policies to moderate growth Martin Chalkley,1 Barry McCormick,2* Robert Anderson,2 Maria Jose Aragon,1 Nazma Nessa,2,3 Catia Nicodemo,2 Stuart Redding2 and Raphael Wittenberg2 1Centre forHealth Economics, University ofYork, York, UK 2Centre forHealth Service Economics and Organisation, Nuffield Department ofPrimary Care, University ofOxford, Oxford, UK 3Department for Business, Innovation and Skills, London, UK *Corresponding author [email protected] Background: The English NHS faces financial pressures that may render thegrowth rates of elective admissions seenbetween 2001/2and 2011/12 unsustainable. A better understanding of admissions growth, and theinfluence of policy, areneeded to minimise theimpact onhealth gainfor patients. Objectives: This project had several objectives: (1) to better understand the determinants of elective activity and policy to moderate growthat minimum healthloss for patients; (2) to build arich data set integrating health, practice and local areadata to study general practitioner (GP) referrals andresulting admissions; (3) to predict patients whosetreatment is unlikely to be cost-effective using patient-reported outcomes and to examine variation in provider performance; and (4) to study how policies that aim to reduce elective admissions may changedemand for emergency care. The main drivers of elective admissions growth haveincreased either supplyof or demand for care, and could include, for example, technical innovations or increased awareness of treatment benefits. Ofthe factors studied, neither system reform norpopulation ageing appears to be akeydriver. The introduction of theprospective payment tariff ‘Payment byResults’appears to have led to primary care trusts (PCTs) having increasingly similar lengths of stay. In deprived areas, increasing GP supply appears to moderate elective admissions. Reducing the incidence of single-handed practices tends to reduce referrals and admissions. Policies to reduce referrals arelikely to reduce admissions buttreatments maybe particularly reduced inthe lowest referring practices, in which resulting health loss maybegreatest. In this model, perfull-time equivalent, female and highly experiencedGPs identify more patients admitted by specialists. Results: It appears from ourstudies that some patient characteristics areassociated with notachieving sufficient patient gainto warrant cost-effective treatment. The introduction of independent sector treatment centres isestimated to have caused an increase in emergency activity rates at local PCTs.The explanations offered for increasing elective admissions indicate that theyare manageableby healthpolicy. Conclusions: Further work isrequired to understand some of the results identified, suchas whether or not high-volume Clinical Commissioning Groupsare fulfilling unmet need;why somepractices refer at low rates relative to admissions; whythe periodeffect, which results from factors that equally affect all in the study at apoint in time, dominates in the age–period–cohort analysis; andexactly howthe emergency and ©Queen’sPrinterandControllerofHMSO2017.ThisworkwasproducedbyChalkleyetal.underthetermsofacommissioningcontractissuedbytheSecretaryofStatefor Health.Thisissuemaybefreelyreproducedforthepurposesofprivateresearchandstudyandextracts(orindeed,thefullreport)maybeincludedinprofessionaljournals v providedthatsuitableacknowledgementismadeandthereproductionisnotassociatedwithanyformofadvertising.Applicationsforcommercialreproductionshouldbe addressedto:NIHRJournalsLibrary,NationalInstituteforHealthResearch,Evaluation,TrialsandStudiesCoordinatingCentre,AlphaHouse,UniversityofSouthamptonScience Park,SouthamptonSO167NS,UK. ABSTRACT elective sections of hospital treatment interact. This project relies on the analysis of secondary data. This type of research does not easilyfacilitate theimportant inputof clinical experts or service users. It would be beneficial ifother methods, including surveys and consultation with keystakeholders, could be incorporated into future research now that we have uncovered important questions. Funding: TheNational Institute for Health Research HealthServices and Delivery Research programme. vi NIHRJournalsLibrary www.journalslibrary.nihr.ac.uk DOI:10.3310/hsdr05070 HEALTHSERVICESANDDELIVERYRESEARCH2017 VOL.5 NO.7 Contents List oftables xi List offigures xv List ofboxes xix List ofabbreviations xxi PlainEnglish summary xxiii Scientific summary xxv Chapter 1Background and research objectives 1 Chapter 2Demand management for elective care:system reform andother driversof growth –anexamination of thefactors affecting the growth of electivehospital activity in Englandfrom 1998to 2012and the implications of these formanaging demand forelective activity 3 Summary 3 Introduction 3 Background 3 Modelling growth in elective activity: therole of another jurisdiction 5 Different perspectives on activity 8 The importance of differential trends 10 A framework for understanding elective activity and its growth 10 The management challenge 11 Summary of findings 11 Dataand empirical methods 14 Data 14 Empirical methods 15 Modelling system reform 18 Variables 19 Results 22 Growth incontinuous inpatient stays 23 Decline in average length of stay 24 Estimating the impact of system reform 24 Interpreting growth in elective activity inEngland 26 Subgroup analysis: high-expenditure Healthcare Resource Groups 26 Examining the effects acrossprimary caretrust clusters 29 Checks onthe sensitivity of the main results 30 Information for commissioning 36 A genericprimary caretrust cluster report 36 A bespokeClinical Commissioning Group report 37 Chapter 3Declining variation in English hospital bed-use andPayment by Results 39 Introduction 39 Thechanges in variation of hospital bed-useacross primary caretrusts, 2002/3–2008/9 40 Thetariff and variation in hospital bed-use 44 ©Queen’sPrinterandControllerofHMSO2017.ThisworkwasproducedbyChalkleyetal.underthetermsofacommissioningcontractissuedbytheSecretaryofStatefor Health.Thisissuemaybefreelyreproducedforthepurposesofprivateresearchandstudyandextracts(orindeed,thefullreport)maybeincludedinprofessionaljournals vii providedthatsuitableacknowledgementismadeandthereproductionisnotassociatedwithanyformofadvertising.Applicationsforcommercialreproductionshouldbe addressedto:NIHRJournalsLibrary,NationalInstituteforHealthResearch,Evaluation,TrialsandStudiesCoordinatingCentre,AlphaHouse,UniversityofSouthamptonScience Park,SouthamptonSO167NS,UK. CONTENTS Analternative explanation: thechanging geography of resource allocation and bed-use 48 Therelationship between efficiency gain and initial mean length of stay 50 Conclusions 52 Chapter 4Trends in elective admissions: an age–period–cohort analysis 53 Introduction 53 Diagnostic procedures admissions 54 Hipand knee replacement procedures 59 Coronary circulation admissions 62 Menorrhagia procedure admissions 66 Conclusions 69 Chapter 5Will increasing the supplyof gatekeeper general practitioners reduce referralsand hospital admissions? 71 Introduction 71 Modelof general practitoner gatekeeping, diagnosis and referrals 74 Illness, treatment, utility and registration 74 Expected nethealth gainand the referral threshold 76 Proposition 1 77 Proposition 2 79 Comparative statics and thewelfare economics of generalpractitioner employment 80 Discussion 80 Why does amore elastic demand for registration haveno effect on s*and patient welfare? 81 General practitioner practice density 81 Econometric strategy 81 Identification and instrumental variables 82 Data 83 Clinical data 83 Lower-layer super output area anddeprivation controls 84 The supply of general practitioners, the sizeof practices and hospital admissions 84 Summary statistics 85 Results 87 Outpatient and elective admissions 87 Emergency admissions 90 Robustness checks 92 Conclusions 98 Chapter 6The determinants of general practitioner referralsand elective hospital admissions: apractice-level study 101 Introduction 101 Data 103 Three stylised facts 104 Empirical strategy and hypotheses 108 Hypotheses and model 110 Results 112 The model of referrals 112 The model of hospital admissions following first referral 113 Explaining thevariation in hospital admission rates between practices 116 Robustness checks 117 Quantile regression 117 Conclusions 120 viii NIHRJournalsLibrary www.journalslibrary.nihr.ac.uk

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addressed to: NIHR Journals Library, National Institute for Health Research, admissions; (3) to predict patients whose treatment is unlikely to be knee replacement, varicose vein surgery and groin hernia surgery. elective activity, across HRGs and PCT clusters) are largely invariant to the
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Most books are stored in the elastic cloud where traffic is expensive. For this reason, we have a limit on daily download.