Methodological changes

This page informs you of changes to the methodology used in our publications.

Audits and performance

Ambulance services

Methodological changes	Publication
Ambulance Services, England, 2010-11 Published: 23 June 2011	Ambulance Services, England
Ambulance Services, England, 2011-12 Published: 20 June 2012

Data on written complaints

Methodological changes	Publication
Data on written complaints in the NHS, 2011-12 Published: 29 August 2012	Data on written complaints in the NHS

National diabetes audit

Methodological changes	Publication
National Diabetes Audit: Report Care Processes and Treatment Targets Published: 2 October 2014	National Diabetes Audit
National Diabetes Audit: Complications Published: 29 January 2015

NHS Safety Thermometer

Methodological changes	Publication
NHS ST classification as management information Published: 17 March 2017	NHS Safety Thermometer Report

Health and lifestyles

Health Survey for England

Methodological changes	Publication
Health Survey for England: Trend tables - 2010 Published: 15 December 2011	Health Survey for England
Health Survey for England: Respiratory health - 2010 Published: 15 December 2011
Health Survey for England: Trend Tables - 2011 Published: 20 December 2012
Health Survey for England 2013 Published:18 December 2013

National Child Measurement Programme

Methodological changes	Publication
National Child Measurement Programme, England, 2019-20 School Year Published: 29 October 2020	National Child Measurement Programme

Methodological changes	Publication
NHS Contraceptive Services, England, 2010-11 Published: 1 December 2011	NHS Contraceptive Services - England
Sexual and Reproductive Health Services, England, 2014-15 Published (as Sexual and Reproductive Health Services, England): 14 October 2015	Sexual and Reproductive Health Services, England
Sexual and Reproductive Health Services, England, 2019-20 Published (as Sexual and Reproductive Health Services, England): 13 October 2020	Sexual and Reproductive Health Services, England

NHS immunisation statistics

Methodological changes	Publication
NHS Immunisation Statistics, England, 2010-2011 Published: 28 September 2011	Childhood Vaccination Coverage Statistics
NHS Immunisation Statistics, England, 2012-2013 Published: 26 September 2013
NHS Immunisation Statistics, England, 2013-14 Published: 25 September 2014

Statistics on alcohol

Methodological changes	Publication
Statistics on alcohol, England, 2012 Published: 31 May 2012	Statistics on Alcohol: England
Statistics on alcohol, England, 2014 Published: 29 May 2014
Statistics on alcohol, England - 2016 Published: 30 June 2016

Statistics on drug misuse

Methodological changes	Publication
Statistics on Drug Misuse, England, 2016 PDF Published: 27 July 2016	Statistics on Drugs Misuse: England, 2016
Statistics on Drug Misuse, England, 2018 PDF Published: 29 November 2018	Statistics on Drug Misuse, England, 2018

Statistics on NHS stop smoking services

Methodological changes	Publication
Statistics on NHS Stop Smoking Services in England April 2014 - June 2014 Published: 29 October 2014	Statistics on NHS Stop Smoking Services in England

Statistics on smoking

Methodological changes	Publication
Statistics on Smoking: England, 2011 Published: 16 August 2011	Statistics on Smoking - England
Statistics on Smoking: England, 2014 Published: 8 October 2014
Statistics on Smoking Published: 18 June 2018

Statistics on women's smoking status at time of delivery

Methodological changes	Publication
Statistics on Women's Smoking Status at Time of Delivery, England 2013 Published: 13 November 2013	Statistics on Women's Smoking Status at Time of Delivery, England
Statistics on Women's Smoking Status at Time of Delivery, England 2017 Published: 07 September 2017

Statistics on smoking, drinking and drug use among young people

Methodological changes	Publication
Smoking, drinking and drug use among young people in England, 2010 Published: 28 July 2011	Smoking, Drinking and Drug Use Among Young People in England
Smoking, Drinking and Drug Use among Young People in England, 2011 Published: 26 July 2012

Statistics on obesity, physical activity and diet, England

Methodological changes	Publication
Statistics on Obesity, Physical Activity and Diet, England, 2014 Published: 26 February 2014	Statistics on Obesity, Physical Activity and Diet - England
Statistics on Obesity, Physical Activity and Diet, England, 2017 Published: 30 March 2017
Statistics on Obesity, Physical Activity and Diet, England, 2019 Published: 05 February 2019

Hospital care

Hospital Episode Statistics data changes in 2021

Methodological changes

Publication

Announcement of methodological change to HES

Methodological changes to HES - Data tables

Published 7 December 2020

Hospital Episode Statistics

Hospital Episode Statistics and Emergency Care data set

Methodological changes

Publication

Provisional Accident and Emergency Quality Indicators - England, by provider and Provisional Monthly Hospital Episode Statistics for Admitted Patient Care, Outpatients and Accident and Emergency data

Published: 24 August 2020

Hospital Episode Statistics

Change to Disclosure Control Methodology for Hospital Episode Statistics and Emergency Care Data Set from September 2018
Published: 20 August 2018

Hospital Episode Statistics

Provisional Accident and Emergency Quality Indicators - England, by provider and Provisional Monthly Hospital Episode Statistics for Admitted Patient Care, Outpatients and Accident and Emergency data

Methodological changes	Publication
Methodological Changes, 2017 Published: 14 December 2017	Hospital Episode Statistics

Provisional Monthly Hospital Episode Statistics for Admitted Patient Care, Outpatients and Accident and Emergency Data

Methodological changes	Publication
Methodological Changes: Provisional Monthly Hospital Episode Statistics for Admitted Patient Care, Outpatients and Accident and Emergency Data 2014 Published: 31 July 2014	Hospital Episode Statistics
Methodological Changes: Provisional Monthly Hospital Episode Statistics for Admitted Patient Care, Outpatients and Accident and Emergency Data 2016 Published: 23 March 2016	Hospital Episode Statistics

Patient Reported Outcome Measures (PROMs)

Methodological changes	Publication
Patient Reported Outcome Measures (PROMs) in England: Experimental Statistics Published: 17 August 2011	Patient Reported Outcome Measures (PROMs)
Provisional Monthly Patient Reported Outcome Measures (PROMs) in England May 2012 Published: 10 May 2012
Provisional Monthly Patient Reported Outcome Measures (PROMs) in England December 2012 Published: 11 December 2012
Finalised Patient Reported Outcome Measures (PROMs) in England Published: 14 August 2013
Finalised Patient Reported Outcome Measures (PROMs) in England and Provisional Monthly Patient Reported Outcome Measures (PROMs) in England Published 15 October 2013
Patient Reported Outcome Measures (PROMs) in England: Experimental Statistics Published: 12 November 2015

Indicators

Clinical Commissioning Group (CCG) Indicators

Methodological changes	Publication
CCG Outcomes Indicator Set - emergency admissions Published: 27 March 2013	CCG Outcomes Indicator Set
CCG Outcomes Indicator Set - potential years of life lost Published: 25 June 2015
CCG Outcomes Indicator Set - mortality from breast cancer in females Published: 22 September 2015
CCG Outcomes Indicator Set - emergency readmissions Published: 19 March 2020

Compendium of population health indicators

Methodological changes	Publication
Hospital Episode Statistics: deaths within 30 days of a hospital procedure or of an emergency admission to hospital Published: 19 August 2015	Compendium - Hospital care indicators
Compendium emergency readmissions within 30 days of discharge from hospital indicator Published: 2 April 2020	Compendium - Emergency readmissions to hospital within 30 days of discharge

NHS Outcomes Framework

Methodological changes	Publication
NHS Outcomes Framework indicators - June 2012 release Published: 28 June 2012	NHS Outcomes Framework Indicators
NHS Outcomes Framework - Cancer Survival Published: 27 March 2013
NHS Outcomes Framework - Emergency Admissions Published: 27 March 2013
NHS Outcomes Framework indicators - December 2013 release Published: 05 December 2013
NHS Outcomes Framework indicators publication - May 2014 Published: 22 May 2014
NHS Outcomes Framework - Emergency Readmissions Published: 20 February 2020

Accident and Emergency

Methodological changes	Publication
Provisional Accident & Emergency Quality Indicators for England. Experimental Statistics by provider for March 2012 Published: 27 July 2012	Accident and Emergency Quality Indicators - England
Provisional Accident and Emergency Quality Indicators for England - July 2017 Published: 17 August 2017	Accident and Emergency Quality Indicators - England

Seven-day services

Methodological changes	Publication
Seven-day Services, published 29 January 2016	Seven-day Services
Seven-day Service, published 26 October 2016	Seven-day Services
Seven-day Service, published 18 June 2018	Seven-day Services
Seven Day Services, published 18 October 2018	Seven-day Services
Seven Day Services, published 15 March 2019
Seven-day Services, published 12 February 2020	Seven-day Services

Summary Hospital-Level Mortality Indicator (SHMI)

Methodological changes	Publication
SHMI - Deaths associated with hospitalisation, England, April 2010 - March 2011 PDF Published: 27 October 2011	SHMI - Deaths associated with hospitalisation, England
SHMI - Deaths associated with hospitalisation, England, July 2010 - June 2011, Experimental Statistics PD Published: 25 January 2012	SHMI - Deaths associated with hospitalisation, England
SHMI - Deaths associated with hospitalisation, England, October 2010 - September 2011, Experimental Statistics PDF Published: 24 April 2012	SHMI - Deaths associated with hospitalisation, England
SHMI - Deaths associated with hospitalisation, England, January 2011 - December 2011, Experimental Statistics PDF Published: 25 July 2012	SHMI - Deaths associated with hospitalisation, England
SHMI - Deaths associated with hospitalisation, England, April 2011 - March 2012, Experimental Statistics PDF, Methodological Change Published: 23 October 2012	SHMI - Deaths associated with hospitalisation, England
SHMI - Deaths associated with hospitalisation, England, July 2011 - June 2012, Experimental Statistics, Methodological Change PDF Published: 24 January 2013	SHMI - Deaths associated with hospitalisation, England
SHMI - Deaths associated with hospitalisation, England, October 2012 - September 2013, Experimental Statistics PDF Published: 30 April 2014	SHMI - Deaths associated with hospitalisation, England
SHMI - Deaths associated with hospitalisation, England, April 2013 - March 2014 PDF Published: 23 October 2014	SHMI - Deaths associated with hospitalisation, England
SHMI - Deaths associated with hospitalisation, England, January 2014 - December 2014 PDF Published: 29 July 2015	SHMI - Deaths associated with hospitalisation, England
SHMI - methodological changes, May 2019 publication v1.0.pdf Published: 29 April 2019	SHMI - Deaths associated with hospitalisation, England
SHMI - methodological changes, March 2020 publication.pdf Published: 26 February 2020	SHMI - Deaths associated with hospitalisation, England
SHMI - methodological changes, July 2020 publication.pdf Published: 22 May 2020	SHMI - Deaths associated with hospitalisation, England
SHMI - methodological changes, March 2021 publication Published: 19 February 2021	SHMI - Deaths associated with hospitalisation, England

Mental health

Improving Access to Psychological Therapies (IAPT)

Methodological changes	Publication
IAPT monthly reports 2021 MCN impact published 13 May 2021	IAPT monthly reports
IAPT monthly reports 2021 published 11January 2021	IAPT monthly reports 2021
IAPT monthly and annual reports 2019 published 12 September 2019	IAPT monthly and annual reports 2019
IAPT monthly and annual reports 2019 published 21 February 2019	IAPT monthly and annual reports 2019
Improving Access to Psychological Therapies, Key Performance Indicators (IAPT KPIs) PDF Published: 11 September 2012	Improving Access to Psychological Therapies, Key Performance Indicators (IAPT KPIs)
Improving Access to Psychological Therapies (IAPT) Reports 2014 Published: 21 November 2014	Psychological Therapies, Report on the use of IAPT services
Improving Access to Psychological Therapies (IAPT) Reports 2015 Published: 21 April 2015	Psychological Therapies, Report on the use of IAPT services
Improving Access to Psychological Therapies (IAPT) Monthly Reports 2016 Published: 26 July 2016	Psychological Therapies, Report on the use of IAPT services
Improving Access to Psychological Therapies (IAPT) Monthly Reports 2017 Published: 25 April 2017	Psychological Therapies, Report on the use of IAPT services
IAPT Monthly and Annual Reports 2018, published 26 February 2018	Improving Access to Psychological Therapies (IAPT) monthly and annual reports
IAPT Monthly and Annual Reports 2018, published 13 September 2018	Improving Access to Psychological Therapies (IAPT) monthly and annual reports
Methodological Change Notice - IAPT February 2019 Published: 04 March 2019	Improving Access to Psychological Therapies (IAPT) monthly and annual reports

Mental Health Act

Methodological changes	Publication
Inpatients formally detained in hospitals under the Mental Health Act 1983 and patients subject to Supervised Community Treatment - Annual Figures, England 2011/12 Published: 24 October 2012	Inpatients Formally Detained in Hospitals Under the Mental Health Act 1983 and Patients Subject to Supervised Community Treatment - England
Mental Health Act Statistics, Annual Figures 2016-17, Experimental statistics Methodological Change Notice Published 10 October 2017	Mental Health Act Statistics, Annual Figures

Mental Health Minimum Dataset

Methodological changes	Publication
Mental Health Bulletin: Annual report from MHMDS returns - England 2011/12, initial national figures Published: 19 February 2013	Mental Health Bulletin: Annual report from MHMDS returns - England
Routine Quarterly Mental Health Minimum Dataset Reports - Provisional Q1 2011/12 summary statistics and related information Published: 16 December 2011	Routine Quarterly Mental Health Minimum Data Set (MHMDS) Reports
Monthly Mental Health Minimum Dataset (MHMDS) Reports Published: 03 September 2013
Monthly MHMDS Reports 2014-15 Published: 17 June 2014	Mental Health and Learning Disabilities Statistics

Mental Health and Learning Disabilities Statistics

Methodological changes	Publication
Monthly MHLDS Reports Published: 20 January 2016	Mental Health and Learning Disabilities Statistics

Mental Health Service Monthly Statistics

Methodological changes	Publication
Impact of improving our Data Processing Services on Mental Health Services Monthly Statistics, 2019-20 onwards Published: 13 November 2019	Mental Health Services Monthly Statistics
Impact of improving our Data Processing Services on Mental Health Services Monthly Statistics, 2019-20 onwards - Reference Tables Published: 13 November 2019	Mental Health Services Monthly Statistics

Patient environment

Patient Led Assessments of the Care Environment - PLACE, England 2014

Methodological changes	Publication
Patient Led Assessments of the Care Environment - PLACE, England 2014 Published: 27 August 2014	Patient-Led Assessments of the Care Environment (PLACE)

Prescribing

Methodological changes	Publication
Prescriptions dispensed in the community Published: 30 July 2013	Prescriptions Dispensed in the Community
CCG Prescribing Data PDF Published: 04 September 2013	CCG Prescribing Data
Use of NICE-appraised Medicines in the NHS in England - 2016	NICE Technology Appraisals in the NHS in England, Innovation Scorecard
Use of NICE-appraised Medicines in the NHS in England - 2012, Experimental Statistics Published: 21 January 2014	NICE Technology Appraisals in the NHS in England (Innovation Scorecard)
NICE Technology Appraisals in the NHS in England (Innovation Scorecard), published 5 March 2014	NICE Technology Appraisals in the NHS in England (Innovation Scorecard)
NICE Technology Appraisals in the NHS in England (Innovation Scorecard), published 25 September 2014	NICE Technology Appraisals in the NHS in England, Innovation Scorecard
NICE Technology Appraisals in the NHS in England (Innovation Scorecard), published 20 January 2015	NICE Technology Appraisals in the NHS in England, Innovation Scorecard
NICE Technology Appraisals in the NHS in England (Innovation Scorecard) Methodological Change Published: 19 May 2015	NICE Technology Appraisals in the NHS in England, Innovation Scorecard
NICE Technology Appraisals in the NHS in England (Innovation Scorecard), published 1 October 2015	NICE Technology Appraisals in the NHS in England, Innovation Scorecard
NICE Technology Appraisals in the NHS in England (Innovation Scorecard), published 12 October 2016	NICE Technology Appraisals in the NHS in England, Innovation Scorecard

Primary care

NHS Continuing Healthcare

Methodological changes	Publication
NHS Continuing Healthcare (NHS CHC): population methodology Published: 16 December 2014	NHS Continuing Healthcare Activity Statistics for England

General Ophthalmic Services

Methodological changes	Publication
General Opthalmic services activity statistics - England, Year ending 31 March 2011 Published: 12 July 2011	General Ophthalmic Services, Activity Statistics, England
General Ophthalmic Services, Activity statistics - England, 2011-12 Published: 12 July 2012

Recorded Dementia Diagnoses

Methodological changes	Publication
Recorded Dementia Diagnoses PDF Published: 13 April 2017	Recorded Dementia Diagnoses

Screening

Breast Screening Programme

Methodological changes	Publication
Breast Screening Programme, England, Statistics for 2012-13 Published: 27 February 2014	Breast Screening Programme

Cervical Screening Programme

Methodological changes	Publication
Cervical screening programme, England, 2010-11 Published: 24 November 2011	Cervical Screening Programme
Cervical screening programme, England, 2012-13 Published: 24 October 2013
Cervical screening programme, England, 2013-14 Published: 25 November 2014

Social care

Adult Social Care Survey

Methodological changes	Publication
Adult Social Care Survey, England 2011-12 Provisional Release Published: 12 September 2012	Personal Social Services Adult Social Care Survey - England
Personal Social Services Adult Social Care Survey, England, 2014-15	Personal Social Services Adult Social Care Survey, England

Community Care Statistics

Methodological changes	Publication
Community Care Statistics: Social Services Activity, England - 2009-10 (further release) Published: 20 April 2011	Community Care Statistics, Social Services Activity, England
Community Care Statistics: Social Services Activity, England 2011-12, Provisional Release Published: 12 September 2012
Community Care Statistics: Social Services Activity, England 2014-15 Published: 6 October 2015

National Indicator Set

Methodological changes	Publication
Social Care and Mental Health Indicators from the National Indicator Set: 2010-11 Provisional Published: 21 October 2011 (provisional) and 28 March 2012 (final)	Social Care and Mental Health Indicators from the National Indicator Set

Personal Social Services

Methodological changes	Publication
Personal Social Services: Expenditure and Unit Costs, England - 2010-11 Provisional Release Published: 30 November 2011	Personal Social Services Expenditure and Unit Costs - England
Personal Social Services: Staff of Social Services Departments, England - At 30 September 2010 Published: 31 March 2011	Personal Social Services: Staff of Social Services Departments
Personal Social Services: Staff of Social Services Departments, England - as at September 2011 Published: 29 March 2012	Personal Social Services: Staff of Social Services Departments
Personal Social Services Survey of Adult Carers in England, 2014 -15 Published: 16 September 2015	Personal Social Services Survey of Adult Carers in England
Personal Social Services: Expenditure and Unit Costs, England 2014/15 onwards Published: 16 September 2015	Personal Social Services: Expenditure and Unit Costs, England

Registered Blind and Partially Sighted People

Methodological changes	Publication
Registered Blind and Partially Sighted People - Year ending 31 March 2011 Published: 1 September 2011	Registered Blind and Partially Sighted People - England

Workforce

Dental Earnings and Expenses

Methodological changes	Publication
Dental Earnings and Expenses - England and Wales, 2009/10 Published: 5 October 2011	Dental Earnings and Expenses
Dental Earnings and Expenses - Northern Ireland, 2009/10 Published: 19 October 2011	Dental Earnings and Expenses
Dental Earnings and Expenses - Scotland, 2009/10 Published: 25 October 2011	Dental Earnings and Expenses
Dental Earnings and Expenses - England and Wales, 2010/11 Published: 22 August 2012	Dental Earnings and Expenses
Dental Earnings and Expenses - Northern Ireland, 2010/11 Published: 3 October 2012	Dental Earnings and Expenses
Dental Earnings and Expenses - Scotland, 2010/11 Published: 26 October 2012	Dental Earnings and Expenses
Dental Earnings and Expenses England and Wales, 2011/12 Published: 22 August 2013	Dental Earnings and Expenses
Dental Earnings and Expenses Estimates 2016-17 Published: 30 August 2018	Dental Earnings and Expenses
Dental Earnings and Expenses Estimates 2017-18 Published: 29 August 2019	Dental Earnings and Expenses
Dental Earnings and Expenses Estimates 2018-19 Published: 27 August 2020	Dental Earnings and Expenses

Dentists' Working Patterns, Motivation and Morale

Methodological changes	Publication
Dental Working Hours - England and Wales, 2010/11 and 2011/12 Published: 22 August 2012	Dental Working Hours
Dental Working Hours - Northern Ireland, 2010/11 and 2011/12 Published: 3 October 2012	Dental Working Hours
Dental Working Hours - Scotland, 2010/11 and 2011/12 Published: 26 October 2012	Dental Working Hours
Announcement of methodological change to dental working hours 2016/17 and 2017/18 Published: 30 August 2018	Dental Working Hours

Dentists' Working Patterns, Motivation and Morale, 2018/19 and 2019/20 Published: 27 August 2020	Dental Working Hours

General Ophthalmic Services: Workforce Statistics for England and Wales

Methodological changes	Publication
General Ophthalmic Services: Workforce Statistics for England and Wales 31 December 2014 Published: 24 March 2015	General Ophthalmic Services Workforce Statistics

General and Personal Medical Services, England

Methodological changes	Publication
General and Personal Medical Services, England September 2015 - (Statistical change notice) Published: 27 April 2016 Delayed from 30 March 2016 for technical reasons	General and Personal Medical Services, England
General and Personal Medical Services, England September 2015 - (Methodological change notice) Published: 27 April 2016 Delayed from 30 March 2016 for technical reasons	General and Personal Medical Services, England
General Practice Workforce - December 2018 (Methodological Change Notice) Published: 04 March 2019
General Practice Workforce - February 2019 (Methodological Change Notice) Published: 04 March 2019	General and Personal Medical Services, England

GP Earnings and Expenses

Methodological changes	Publication
GP Earnings and Expenses - 2009/10 pdf Published: 09 November 2011	GP Earnings and Expenses
GP Earnings and Expenses - 2010/11 pdf Published: 26 September 2012
GP Earnings and Expenses 2011/12 Published: 25 September 2013
GP Earnings and Expenses Estimates 2016/17 pdf Published: 30 August 2018

Investment in General Practice

Methodological changes	Publication
Investment in General Practice, England, Wales, Northern Ireland and Scotland 2008/09 to 2012/13 Published: 25 September 2013	Investment in General Practice

NHS Payments to General Practice, England

Methodological changes	Publication
NHS Payments to General Practice, England 2018-19 Published: 19 September 2019	NHS Payments to General Practice

NHS Workforce Statistics

Methodological changes

Publication

Sources for Workforce Publications

NHS Workforce Statistics PDF
Published: 30 March 2015

NHS Workforce Statistics

Healthcare Workforce Statistics

General and Personal Medical Services

Last edited: 13 May 2021 11:56 am