7  Data coverage (years)

Coverage of the Attribute data currently available within ECHILD (years of follow-up).

Key	Detail
a	HES data are collated by financial year (1st Apr to 31st Mar), which partially covers an academic year (1st Sep to 31st Aug).
b	Partial coverage as HES A&E data were experimental and did not have full national coverage.
c	Partial coverage as HES Outpatient data were experimental and did not have full national coverage.
d	Partial coverage of an academic year as ONS Mortality data were first linked to HES in January 1998.
e	The PRU Census were subsumed into the School Census Pupil Level from 2013/14.
f	The Early Years Census included 3- to 4-year-olds between 2007/08 and 2012/13. From 2013/14 it includes 2- to 4-year-olds.
g	Key Stage 3 assessments ceased after 2012/13.
h	Partial coverage of population as between 01/04/1992 & 31/03/2003, CLA data were only collected for a one-third sample (i.e., children with a day of birth divisible by 3).
i	Linkage between Education & Social Care modules of NPD began 1 April 2005 for CLA and 1 October 2008 for CIN (partially complete until 2012, mainly applies to under 5-year-olds).
j	Not yet ingested to ONS SRS.
k	Not collected to help reduce the burden on educational and care settings during the coronavirus (COVID-19) pandemic.
l	Partial coverage as between the 2002/3 and 2005/6 academic years, data only on a 10% sample of children.
m	Not provided with standard institutional identifiers in 2019/20 and 2020/21 as evaluation of individual institutional performance during the pandemic years is not permitted.
n	From 2001/02 to 2004/05 annual census exists, from 2005/06 onwards census data are termly.
o	ECDS data from October 2017 to 2019/20 are considered pilot data, with ECDS formally replacing HES A&E in 2020/21.
p	MHSDS: v1.5 (from 2015/16 to 2018/19) up to v5.0 (from Oct 2021 to Mar 2022).
q	Data from October 2002.
r	Data from January 1996.

Administrative Data Research UK (2023) “ECHILD: Linking children’s health and education data for england.” Available at: https://www.adruk.org/our-work/browse-all-projects/echild-linking-childrens-health-and-education-data-for-england-142/.

Benchimol, E.I. et al. (2015) “The REporting of studies Conducted using Observational Routinely-collected health Data (RECORD) statement,” PLoS Med, 12(10), p. e1001885.

Blackburn, R. et al. (2021) “Hospital admissions for stress-related presentations among school-aged adolescents during term time versus holidays in england: Weekly time series and retrospective cross-sectional analysis,” BJPsych Open, 7(6), p. e215.

Blackburn, R. et al. (2022) “COVID-19-related school closures and patterns of hospital admissions with stress-related presentations in secondary school-aged adolescents: Weekly time series,” Br J Psychiatr, 221(5), pp. 655–657.

Boyd, A. et al. (2018) “Understanding hospital episode statistics (HES).” Available at: https://www.closer.ac.uk/wp-content/uploads/CLOSER-resource-understanding-hospital-episode-statistics-2018.pdf.

Clinical Practice Research Datalink (2021) “Clinical practice research datalink (CPRD): Hospital episode statistics (HES) admitted patient care (APC) data dictionary.” Available at: https://cprd.com/sites/default/files/2022-02/Data_Dictionary_HES_APC.pdf.

CSCDUG (2023) “The children’s social care data user group (CSCDUG).” Available at: https://cscdug.co.uk/.

Department for Education (2015) “The national pupil database user guide.” Available at: http://doc.ukdataservice.ac.uk/doc/7627/mrdoc/pdf/7627userguide_2015.pdf.

Department for Education (2017) “Exclusions statistics guide.” Available at: https://www.gov.uk/government/publications/exclusions-statistics-guide.

Department for Education (2019) “Unique pupil numbers (UPNs).” Available at: https://www.gov.uk/government/publications/unique-pupil-numbers.

Department for Education (2022) “The school census – what you need to know.” Available at: https://educationhub.blog.gov.uk/2022/10/07/the-school-census-what-you-need-to-know/.

Department for Education (2023a) “Children in need census: Guide to submitting data.” Available at: https://www.gov.uk/guidance/children-in-need-census.

Department for Education (2023b) “Find and explore data in the national pupil database.” Available at: https://find-npd-data.education.gov.uk/.

Department for Education (2023c) “Individualised learner record (ILR) technical documents, guidance and requirements.” Available at: https://guidance.submit-learner-data.service.gov.uk/.

Department for Education (2023d) “NCCIS management information requirement.” Available at: https://www.gov.uk/government/publications/nccis-management-information-requirement.

Department for Education (2023e) “Pupil absence statistics: guide.” Available at: https://www.gov.uk/government/publications/absence-statistics-guide.

Department for Education (2024a) “Alternative provision census.” Available at: https://www.gov.uk/guidance/alternative-provision-ap-census.

Department for Education (2024b) “Apply for department for education (DfE) personal data.” Available at: https://www.gov.uk/guidance/apply-for-department-for-education-dfe-personal-data.

Department for Education (2024c) “Children looked after return: Guide to submitting data.” Available at: https://www.gov.uk/guidance/children-looked-after-return-guide-to-submitting-data.

Department for Education (2024d) “Complete the school census.” Available at: https://www.gov.uk/guidance/complete-the-school-census.

Department for Education (2024e) “Data collection and censuses for schools.” Available at: https://www.gov.uk/education/data-collection-and-censuses-for-schools#guidance_and_regulation.

Department for Education (2024f) “Early years census.” Available at: https://www.gov.uk/guidance/complete-the-early-years-census.

Department for Education (2024g) “Get information about schools.” Available at: https://get-information-schools.service.gov.uk/.

Department for Education (2024h) “Statistics: Children in need and child protection.” Available at: https://www.gov.uk/government/collections/statistics-children-in-need.

Department for Education (2024i) “Statistics: Looked-after children.” Available at: https://www.gov.uk/government/collections/statistics-looked-after-children.

ECHILD (2023) “The ECHILD project.” Available at: https://www.echild.ac.uk.

Emmott, E.H., Jay, M.A. and Woodman, J. (2019) “Cohort profile: Children in need census (CIN) records of children referred for social care support in england,” BMJ Open, 9(2), p. e023771.

Etoori, D. et al. (2022) “Reductions in hospital care among clinically vulnerable children aged 0–4 years during the COVID-19 pandemic,” Arch Dis Child, 107, p. e29.

Gilbert, R. et al. (2017) “GUILD: GUidance for Information about Linking Data sets,” J Pub Health, 40(1), pp. 191–198.

Green, F. et al. (2017) “Who chooses private schooling in britain and why?” Available at: https://www.llakes.ac.uk/wp-content/uploads/2021/03/RP-62.-Green-Anders-Henderson-Henseke.pdf.

Harron, K. et al. (2016) “Linking data for mothers and babies in de-identified electronic health data,” PLoS One, 11(10), p. e0164667.

Harron, K. et al. (2017) “A guide to evaluating linkage quality for the analysis of linked data,” Int J Epidemiol, 46, pp. 1699–1710.

Health Data Research (2023a) “Innovation gateway: Hospital episode statistics accident and emergency (HES a&e).” Available at: https://web.www.healthdatagateway.org/dataset/101a7d68-1675-4b47-bfac-dde7b7b57877.

Health Data Research (2023b) “Innovation gateway: Hospital episode statistics admitted patient care (HES APC).” Available at: https://web.www.healthdatagateway.org/dataset/6599230a-df54-4615-937c-d724d239491f.

Health Data Research (2023c) “Innovation gateway: Hospital episode statistics critical care (HES CC).” Available at: https://web.www.healthdatagateway.org/dataset/d0eeba22-bc3f-4c40-be69-a99f916897a2.

Health Data Research (2023d) “Innovation gateway: Hospital episode statistics outpatients.” Available at: https://web.www.healthdatagateway.org/dataset/d4362d41-0838-4f41-bba3-c3268312c444.

Health Data Research (2023e) “Innovation gateway: Maternity services data set (MSDS).” Available at: https://web.www.healthdatagateway.org/dataset/0681a1e9-3778-4f43-88b3-6540515404b6.

Herbert, A. et al. (2017) “Data resource profile: Hospital episode statistics admitted patient care,” Int J Epidemiol, 46(4), pp. 1093–1093i.

Jay, M.A., Mc Grath-Lone, L. and Gilbert, R. (2019) “Data resource: The national pupil database (NPD),” Int J Pop Data Sci, 4(1), p. 08.

Libuy, N. et al. (2021) “Linking education and hospital data in england: Linkage process and quality,” Int J Pop Data Sci, 6(1), p. 13.

Libuy, N. et al. (2022) “Gestational age at birth, chronic conditions and school outcomes: A population-based data linkage study of children born in england,” Int J Epidemiol, 52(1), pp. 132–143.

Mc Grath-Lone, L., Dearden, L., et al. (2016) “Changes in first entry to out-of-home care from 1992 to 2012 among children in england,” Child Abuse & Neglect, 51, pp. 163–171.

Mc Grath-Lone, L., Harron, K., et al. (2016) “Data resource profile: Children looked after return (CLA),” Int J Epidemiol, 45(3), pp. 716–717f.

Mc Grath-Lone, L., Libuy, N., Harron, K., et al. (2021) “Data resource profile: The education and child health insights from linked data (ECHILD) database,” Int J Epidemiol, 51(1), pp. 17–17f.

Mc Grath-Lone, L., Libuy, N., Etoori, D., et al. (2021) “Ethnic bias in data linkage,” Lancet Digital Health, 3(6), p. e339.

Mc Grath-Lone, L., Etoori, D., et al. (2022) “Changes in adolescents’ planned hospital care during the COVID-19 pandemic: Analysis of linked administrative data,” Arch Dis Chil, 107(10), p. e29.

Mc Grath-Lone, L., Jay, M.A., et al. (2022) “What makes administrative data ‘research-ready’? A systematic review and thematic analysis of published literature,” Int J Pop Data Sci, 7(1), p. 1718.

Morris, H., Lanati, S. and Gilbert, R. (2018) “Challenges of administrative data linkages: Experiences of administrative data research centre for england (ADRC-E) researchers,” Int J Pop Data Sci, 3(2), p. 097.

Nguyen, V.G. et al. (2022) “SEN support from the start of school and its impact on unplanned hospital utilisation in children with cleft lip and palate: A demonstration target trial emulation protocol using ECHILD.” Available at: https://www.medrxiv.org/content/10.1101/2022.04.01.22273280v1.

NHS England (2023a) “About the maternity services data set (MSDS).” Available at: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/maternity-services-data-set/about-the-maternity-services-data-set.

NHS England (2023b) “Birth notification process.” Available at: https://digital.nhs.uk/services/national-care-records-service/birth-notification-process.

NHS England (2023c) “ECDS guidance and documents.” Available at: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/emergency-care-data-set-ecds/ecds-guidance.

NHS England (2023d) “Emergency care data set (ECDS).” Available at: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/emergency-care-data-set-ecds.

NHS England (2023e) “Hospital accident & emergency activity.” Available at: https://digital.nhs.uk/data-and-information/publications/statistical/hospital-accident--emergency-activity.

NHS England (2023f) “Hospital episode statistics data dictionary.” Available at: https://digital.nhs.uk/data-and-information/data-tools-and-services/data-services/hospital-episode-statistics/hospital-episode-statistics-data-dictionary.

NHS England (2023g) “Hospital episode statistics (HES).” Available at: https://digital.nhs.uk/data-and-information/data-tools-and-services/data-services/hospital-episode-statistics.

NHS England (2023h) “Hospital episode statistics (HES) data changes in 2021.” Available at: https://digital.nhs.uk/data-and-information/data-tools-and-services/data-services/hospital-episode-statistics/hospital-episode-statistics-data-changes-in-2021.

NHS England (2023i) “Hospital outpatient activity.” Available at: https://digital.nhs.uk/data-and-information/publications/statistical/hospital-outpatient-activity.

NHS England (2023j) “Introduction to community services data set (CSDS).” Available at: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/community-services-data-set/guidance/introduction.

NHS England (2023k) “Linked HES-ONS mortality data.” Available at: https://digital.nhs.uk/data-and-information/data-tools-and-services/data-services/linked-hes-ons-mortality-data.

NHS England (2023l) “Master person service (MPS).” Available at: https://digital.nhs.uk/services/demographics/master-person-service.

NHS England (2023m) “Mental health services data set (MHSDS).” Available at: https://digital.nhs.uk/data-and-information/data-collections-and-data-sets/data-sets/mental-health-services-data-set/about.

NHS England (2024a) “Hospital admitted patient care activity.” Available at: https://digital.nhs.uk/data-and-information/publications/statistical/hospital-admitted-patient-care-activity.

NHS England (2024b) “Hospital adult critical care activity.” Available at: https://digital.nhs.uk/data-and-information/publications/statistical/hospital-adult-critical-care-activity.

NHS England (2024c) “Mental health data (MHMDS, MHLDDS, MHSDS).” Available at: https://digital.nhs.uk/services/data-access-request-service-dars/dars-products-and-services/data-set-catalogue/mental-health-data.

NHS England (2024d) “Methodological changes.” Available at: https://digital.nhs.uk/data-and-information/find-data-and-publications/statement-of-administrative-sources/methodological-changes.

NHS Primary Care Support England (2023) “Adoptions and gender reassignment.” Available at: https://pcse.england.nhs.uk/help/patient-registrations/adoption-and-gender-re-assignment-processes/.

Office for National Statistics (2023a) “Access the data securely.” Available at: https://www.ons.gov.uk/aboutus/whatwedo/statistics/requestingstatistics/secureresearchservice/accessthedatasecurely#assured-organisational-connectivity-aoc.

Office for National Statistics (2023b) “Secure research service.” Available at: https://www.ons.gov.uk/aboutus/whatwedo/statistics/requestingstatistics/secureresearchservice.

Office for National Statistics (2024) “User guide to birth statistics.” Available at: https://www.ons.gov.uk/peoplepopulationandcommunity/birthsdeathsandmarriages/livebirths/methodologies/userguidetobirthstatistics.

Playford, C.J. et al. (2016) “Administrative social science data: The challenge of reproducible research,” Big Data & Society, 3, p. doi:10.1177/2053951716684143.

Scourfield, J. et al. (2019) “Overview of administrative data on children’s social care in england.” Available at: https://whatworks-csc.org.uk/wp-content/uploads/WWCSC_Overview_of_administrative_data_Oct_2019.pdf.

UK Statistics Authority (2023) “Ethics self-assessment tool.” Available at: https://uksa.statisticsauthority.gov.uk/the-authority-board/committees/national-statisticians-advisory-committees-and-panels/national-statisticians-data-ethics-advisory-committee/ethics-self-assessment-tool/.

University of Bristol (2023) “National pupil database user group.” Available at: http://www.bristol.ac.uk/cmpo/npd-user-group/.