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Weekend specialist intensity and admission mortality in acute hospital trusts in England : a cross-sectional study
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Aldridge, Cassie, Bion, Julian, Boyal, Amunpreet, Chen, Y-F., Clancy, Mike, Evans, Tim, Girling, Alan, Lord, Joanne, Mannion, Russell, Rees, Peter, Roseveare, Chris, Rudge, Gavin, Sun, Jianxia, Tarrant, Carolyn, Temple, Mark, Watson, Samuel I. and Lilford, Richard (2016) Weekend specialist intensity and admission mortality in acute hospital trusts in England : a cross-sectional study. The Lancet, 388 (10040). pp. 178-186. doi:10.1016/S0140-6736(16)30442-1 ISSN 0140-6736.
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Official URL: http://dx.doi.org/10.1016/S0140-6736(16)30442-1
Abstract
Background
Increased mortality rates associated with weekend hospital admission (the so-called weekend effect) have been attributed to suboptimum staffing levels of specialist consultants. However, evidence for a causal association is elusive, and the magnitude of the weekend specialist deficit remains unquantified. This uncertainty could hamper efforts by national health systems to introduce 7 day health services. We aimed to examine preliminary associations between specialist intensity and weekend admission mortality across the English National Health Service.
Methods
Eligible hospital trusts were those in England receiving unselected emergency admissions. On Sunday June 15 and Wednesday June 18, 2014, we undertook a point prevalence survey of hospital specialists (consultants) to obtain data relating to the care of patients admitted as emergencies. We defined specialist intensity at each trust as the self-reported estimated number of specialist hours per ten emergency admissions between 0800 h and 2000 h on Sunday and Wednesday. With use of data for all adult emergency admissions for financial year 2013–14, we compared weekend to weekday admission risk of mortality with the Sunday to Wednesday specialist intensity ratio within each trust. We stratified trusts by size quintile.
Findings
127 of 141 eligible acute hospital trusts agreed to participate; 115 (91%) trusts contributed data to the point prevalence survey. Of 34 350 clinicians surveyed, 15 537 (45%) responded. Substantially fewer specialists were present providing care to emergency admissions on Sunday (1667 [11%]) than on Wednesday (6105 [42%]). Specialists present on Sunday spent 40% more time caring for emergency patients than did those present on Wednesday (mean 5·74 h [SD 3·39] vs 3·97 h [3·31]); however, the median specialist intensity on Sunday was only 48% (IQR 40–58) of that on Wednesday. The Sunday to Wednesday intensity ratio was less than 0·7 in 104 (90%) of the contributing trusts. Mortality risk among patients admitted at weekends was higher than among those admitted on weekdays (adjusted odds ratio 1·10, 95% CI 1·08–1·11; p<0·0001). There was no significant association between Sunday to Wednesday specialist intensity ratios and weekend to weekday mortality ratios (r −0·042; p=0·654).
Interpretation
This cross-sectional analysis did not detect a correlation between weekend staffing of hospital specialists and mortality risk for emergency admissions. Further investigation is needed to evaluate whole-system secular change during the implementation of 7 day services. Policy makers should exercise caution before attributing the weekend effect mainly to differences in specialist staffing.
Funding
National Institute for Health Research Health Services and Delivery Research Programme.
| Item Type: | Journal Article | ||||
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| Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Health Sciences Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School > Health Sciences > Population, Evidence & Technologies (PET) Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School |
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| Journal or Publication Title: | The Lancet | ||||
| Publisher: | Lancet Publishing Group | ||||
| ISSN: | 0140-6736 | ||||
| Official Date: | 10 May 2016 | ||||
| Dates: |
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| Volume: | 388 | ||||
| Number: | 10040 | ||||
| Page Range: | pp. 178-186 | ||||
| DOI: | 10.1016/S0140-6736(16)30442-1 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Open Access (Creative Commons) |
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