Nurse staffing, nursing assistants and hospital mortality: retrospective longitudinal cohort study.

Abstract:

OBJECTIVE:To determine the association between daily levels of registered nurse (RN) and nursing assistant staffing and hospital mortality. DESIGN:This is a retrospective longitudinal observational study using routinely collected data. We used multilevel/hierarchical mixed-effects regression models to explore the association between patient outcomes and daily variation in RN and nursing assistant staffing, measured as hours per patient per day relative to ward mean. Analyses were controlled for ward and patient risk. PARTICIPANTS:138 133 adult patients spending >1 days on general wards between 1 April 2012 and 31 March 2015. OUTCOMES:In-hospital deaths. RESULTS:Hospital mortality was 4.1%. The hazard of death was increased by 3% for every day a patient experienced RN staffing below ward mean (adjusted HR (aHR) 1.03, 95% CI 1.01 to 1.05). Relative to ward mean, each additional hour of RN care available over the first 5 days of a patient's stay was associated with 3% reduction in the hazard of death (aHR 0.97, 95% CI 0.94 to 1.0). Days where admissions per RN exceeded 125% of the ward mean were associated with an increased hazard of death (aHR 1.05, 95% CI 1.01 1.09). Although low nursing assistant staffing was associated with increases in mortality, high nursing assistant staffing was also associated with increased mortality. CONCLUSION:Lower RN staffing and higher levels of admissions per RN are associated with increased risk of death during an admission to hospital. These findings highlight the possible consequences of reduced nurse staffing and do not give support to policies that encourage the use of nursing assistants to compensate for shortages of RNs.

journal_name

BMJ Qual Saf

journal_title

BMJ quality & safety

authors

Griffiths P,Maruotti A,Recio Saucedo A,Redfern OC,Ball JE,Briggs J,Dall'Ora C,Schmidt PE,Smith GB,Missed Care Study Group.

doi

10.1136/bmjqs-2018-008043

subject

Has Abstract

pub_date

2019-08-01 00:00:00

pages

609-617

issue

8

eissn

2044-5415

issn

2044-5423

pii

bmjqs-2018-008043

journal_volume

28

pub_type

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