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. 2015 Apr 15:350:h1460.
doi: 10.1136/bmj.h1460.

Incidence of "never events" among weekend admissions versus weekday admissions to US hospitals: national analysis

Frank J Attenello  1 , Timothy Wen  2 , Steven Y Cen  3 , Alvin Ng  4 , May Kim-Tenser  5 , Nerses Sanossian  5 , Arun P Amar  1 , William J Mack  1
Affiliations

Incidence of "never events" among weekend admissions versus weekday admissions to US hospitals: national analysis

Frank J Attenello et al. BMJ. .

Abstract

Objective: To evaluate the association between weekend admission to hospital and 11 hospital acquired conditions recently considered by the Centers for Medicare and Medicaid as "never events" for which resulting healthcare costs are not reimbursed.

Design: National analysis.

Setting: US Nationwide Inpatient Sample discharge database.

Participants: 351 million patients discharged from US hospitals, 2002-10.

Main outcome measures: Univariate rates and multivariable likelihood of hospital acquired conditions among patients admitted on weekdays versus weekends, as well as the impacts of these events on prolonged length of stay and total inpatient charges.

Results: From 2002 to 2010, 351,170,803 patients were admitted to hospital, with 19% admitted on a weekend. Hospital acquired conditions occurred at an overall frequency of 4.1% (5.7% among weekend admissions versus 3.7% among weekday admissions). Adjusting for patient and hospital cofactors the probability of having one or more hospital acquired conditions was more than 20% higher in weekend admissions compared with weekday admissions (odds ratio 1.25, 95% confidence interval 1.24 to 1.26, P<0.01). Hospital acquired conditions have a negative impact on both hospital charges and length of stay. At least one hospital acquired condition was associated with an 83% (1.83, 1.77 to 1.90, P<0.01) likelihood of increased charges and 38% likelihood of prolonged length of stay (1.38, 1.36 to 1.41, P<0.01).

Conclusion: Weekend admission to hospital is associated with an increased likelihood of hospital acquired condition, cost, and length of stay. Future protocols and staffing regulations must be tailored to the requirements of this high risk subgroup.

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Conflict of interest statement

Competing interests: All authors have completed the ICMJE uniform disclosure form at www.icmje.org/coi_disclosure.pdf and declare: no support from any organisation for the submitted work; no financial relationships with any organisations that might have an interest in the submitted work in the previous three years; no other relationships or activities that could appear to have influenced the submitted work.

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