RT Journal Article SR Electronic T1 Changes in weekend and weekday care quality of emergency medical admissions to 20 hospitals in England during implementation of the 7-day services national health policy JF BMJ Quality & Safety JO BMJ Qual Saf FD BMJ Publishing Group Ltd SP 536 OP 546 DO 10.1136/bmjqs-2020-011165 VO 30 IS 7 A1 Julian Bion A1 Cassie Aldridge A1 Alan J Girling A1 Gavin Rudge A1 Jianxia Sun A1 Carolyn Tarrant A1 Elizabeth Sutton A1 Janet Willars A1 Chris Beet A1 Amunpreet Boyal A1 Peter Rees A1 Chris Roseveare A1 Mark Temple A1 Samuel Ian Watson A1 Yen-Fu Chen A1 Mike Clancy A1 Louise Rowan A1 Joanne Lord A1 Russell Mannion A1 Timothy Hofer A1 Richard Lilford YR 2021 UL http://qualitysafety.bmj.com/content/30/7/536.abstract AB Background In 2013, the English National Health Service launched the policy of 7-day services to improve care quality and outcomes for weekend emergency admissions.Aims To determine whether the quality of care of emergency medical admissions is worse at weekends, and whether this has changed during implementation of 7-day services.Methods Using data from 20 acute hospital Trusts in England, we performed randomly selected structured case record reviews of patients admitted to hospital as emergencies at weekends and on weekdays between financial years 2012–2013 and 2016–2017. Senior doctor (‘specialist’) involvement was determined from annual point prevalence surveys. The primary outcome was the rate of clinical errors. Secondary outcomes included error-related adverse event rates, global quality of care and four indicators of good practice.Results Seventy-nine clinical reviewers reviewed 4000 admissions, 800 in duplicate. Errors, adverse events and care quality were not significantly different between weekend and weekday admissions, but all improved significantly between epochs, particularly errors most likely influenced by doctors (clinical assessment, diagnosis, treatment, prescribing and communication): error rate OR 0.78; 95% CI 0.70 to 0.87; adverse event OR 0.48, 95% CI 0.33 to 0.69; care quality OR 0.78, 95% CI 0.70 to 0.87; all adjusted for age, sex and ethnicity. Postadmission in-hospital care processes improved between epochs and were better for weekend admissions (vital signs with National Early Warning Score and timely specialist review). Preadmission processes in the community were suboptimal at weekends and deteriorated between epochs (fewer family doctor referrals, more patients with chronic disease or palliative care designation).Conclusions and implications Hospital care quality of emergency medical admissions is not worse at weekends and has improved during implementation of the 7-day services policy. Causal pathways for the weekend effect may extend into the prehospital setting.Data are available on reasonable request. We are willing to share our data for collaborative research.