Nurse staffing and patient outcomes: Strengths and limitations of the evidence to inform policy and practice. A review and discussion paper based on evidence reviewed for the National Institute for Health and Care Excellence Safe Staffing guideline development

CARGA DE TRABALHO DE ENFERMAGEM E A MORTALIDADE DOS PACIENTES EM UNIDADE DE TERAPIA INTENSIVA

RESUMO Objetivo: verificar se a carga de trabalho de enfermagem é em preditor de mortalidade em Unidade de Terapia Intensiva. Método: estudo documental, retrospectivo, corte transversal, desenvolvido na Unidade de Terapia Intensiva de um hospital universitário terciário. Utilizou-se a curva Receiver Operator Characteristic Curve composta pelo Nursing Activities Score e índice de gravidade APACHE e regressão logística para análise da predição de mortalidade. Resultados: compuseram a amostra 324 pacientes, sendo 214 (66%) sobreviventes. A média Nursing Activities Score das primeiras 24 horas de internação foi de 79,3 pontos, variando de 34,8 a 134,2 pontos e o APACHE II mediano foi 24,5 (2-42). Na análise da curva Receiver Operator Characteristic Curve o Nursing Activities Score evidenciou uma área sobre a curva de 0,626; IC 0,570 a 0,678 e o APACHE II de 0,721 com intervalo de confiança IC 95% de 0,669 a 0,769. Conclusão: a carga de trabalho de enfermagem não foi um preditor de mortalidade em Unidade de Terapia Intensiva, pois os pacientes que demandam a maior carga de trabalho de enfermagem não necessariamente são aqueles que evoluem para óbito.

Nurse staffing levels, missed vital signs and mortality in hospitals: retrospective longitudinal observational study

Background

Low nurse staffing levels are associated with adverse patient outcomes from hospital care, but the causal relationship is unclear. Limited capacity to observe patients has been hypothesised as a causal mechanism.

Objectives

This study determines whether or not adverse outcomes are more likely to occur after patients experience low nurse staffing levels, and whether or not missed vital signs observations mediate any relationship.

Design

Retrospective longitudinal observational study. Multilevel/hierarchical mixed-effects regression models were used to explore the association between registered nurse (RN) and health-care assistant (HCA) staffing levels and outcomes, controlling for ward and patient factors.

Setting and participants

A total of 138,133 admissions to 32 general adult wards of an acute hospital from 2012 to 2015.

Main outcomes

Death in hospital, adverse event (death, cardiac arrest or unplanned intensive care unit admission), length of stay and missed vital signs observations.

Data sources

Patient administration system, cardiac arrest database, eRoster, temporary staff bookings and the Vitalpac system (System C Healthcare Ltd, Maidstone, Kent; formerly The Learning Clinic Limited) for observations.

Results

Over the first 5 days of stay, each additional hour of RN care was associated with a 3% reduction in the hazard of death [hazard ratio (HR) 0.97, 95% confidence interval (CI) 0.94 to 1.0]. Days on which the HCA staffing level fell below the mean were associated with an increased hazard of death (HR 1.04, 95% CI 1.02 to 1.07), but the hazard of death increased as cumulative staffing exposures varied from the mean in either direction. Higher levels of temporary staffing were associated with increased mortality. Adverse events and length of stay were reduced with higher RN staffing. Overall, 16% of observations were missed. Higher RN staffing was associated with fewer missed observations in high-acuity patients (incidence rate ratio 0.98, 95% CI 0.97 to 0.99), whereas the overall rate of missed observations was related to overall care hours (RN + HCA) but not to skill mix. The relationship between low RN staffing and mortality was mediated by missed observations, but other relationships between staffing and mortality were not. Changing average skill mix and staffing levels to the levels planned by the Trust, involving an increase of 0.32 RN hours per patient day (HPPD) and a similar decrease in HCA HPPD, would be associated with reduced mortality, an increase in staffing costs of £28 per patient and a saving of £0.52 per patient per hospital stay, after accounting for the value of reduced stays.

Limitations

This was an observational study in a single site. Evidence of cause is not definitive. Variation in staffing could be influenced by variation in the assessed need for staff. Our economic analysis did not consider quality or length of life.

Conclusions

Higher RN staffing levels are associated with lower mortality, and this study provides evidence of a causal mechanism. There may be several causal pathways and the absolute rate of missed observations cannot be used to guide staffing decisions. Increases in nursing skill mix may be cost-effective for improving patient safety.

Future work

More evidence is required to validate approaches to setting staffing levels. Other aspects of missed nursing care should be explored using objective data. The implications of findings about both costs and temporary staffing need further exploration.

Trial registration

This study is registered as ISRCTN17930973.

Funding

This project was funded by the National Institute for Health Research (NIHR) Health Services and Delivery Research programme and will be published in full in Health Services and Delivery Research; Vol. 6, No. 38. See the NIHR Journals Library website for further project information.

A protocol to measure the impact of intentional changes to nurse staffing and skill-mix in medical and surgical wards

AIM

The aim of this research is to measure the impact that planned changes to nurse staffing and skill-mix have on patient, nurse, and organizational outcomes.

BACKGROUND

It has been highlighted that there are several design limitations in studies that explore the relationship between nurse staffing and patient, nurse and organizational outcomes; not least that the vast majority of research in this area emanates from studies that are predominantly observational in design. There are limited studies that measure nurse, patient, organizational, and economic outcomes using a longitudinal design following a planned change in nurse staffing.

DESIGN

The research will employ a longitudinal, multimethod approach to evaluate the impact that planned changes in nurse staffing and skill-mix have on wards in three pilot hospitals.

METHODS

Administrative data collection will take place on a shift-by-shift basis prospectively over a three-year period including the measurement of nursing sensitive outcomes: cross-sectional patient experience data and nurse outcomes (nursing work, job satisfaction, burnout, missed care) will be collected at intervals prior to, during and after the implementation of planned changes in nurse staffing and skill-mix. Data will be analysed using interrupted time-series models, adjusted for key hospital, ward and patient-level factors. An economic costing of the changes will further investigate the resources required for the intervention that can then be aggregated to a national level for future roll-out plans.

DISCUSSION

The study aims to provide evidence on the impact of planned changes to nurse staffing and skill-mix based on a systematic approach using a longitudinal design and to determine the extent to which the approach can be implemented at a national level.

The value of measurement for development of nursing knowledge: Underlying philosophy, contributions and critiques

AIM

A philosophical discussion of constructive realism and measurement in the development of nursing knowledge is presented.

BACKGROUND

Through Carper's four patterns of knowing, nurses come to know a person holistically. However, measurement as a source for nursing knowledge has been criticized for underlying positivism and reductionist approach to exploring reality. Which seems mal-alignment with person-centred care.

DESIGN

Discussion paper.

DISCUSSION

Constructive realism bridges positivism and constructivism, facilitating the measurement of physical and psychological phenomena. Reduction of complex phenomena and theoretical constructs into measurable properties is essential to building nursing's empiric knowledge and facilitates (rather than inhibits) person-knowing.

IMPLICATIONS FOR NURSING

Nurses should consider constructive realism as a philosophy to underpin their practice. This philosophy supports measurement as a primary method of inquiry in nursing research and clinical practice. Nurses can carefully select, and purposefully integrate, measurement tools with other methods of inquiry (such as qualitative research methods) to demonstrate the usefulness of nursing interventions and highlight nursing as a science.

Nursing workload, patient safety incidents and mortality: an observational study from Finland

OBJECTIVE

To investigate whether the daily workload per nurse (Oulu Patient Classification (OPCq)/nurse) as measured by the RAFAELA system correlates with different types of patient safety incidents and with patient mortality, and to compare the results with regressions based on the standard patients/nurse measure.

SETTING

We obtained data from 36 units from four Finnish hospitals. One was a tertiary acute care hospital, and the three others were secondary acute care hospitals.

PARTICIPANTS

Patients' nursing intensity (249 123 classifications), nursing resources, patient safety incidents and patient mortality were collected on a daily basis during 1 year, corresponding to 12 475 data points. Associations between OPC/nurse and patient safety incidents or mortality were estimated using unadjusted logistic regression models, and models that adjusted for ward-specific effects, and effects of day of the week, holiday and season.

PRIMARY AND SECONDARY OUTCOME MEASURES

Main outcome measures were patient safety incidents and death of a patient.

RESULTS

When OPC/nurse was above the assumed optimal level, the adjusted odds for a patient safety incident were 1.24 (95% CI 1.08 to 1.42) that of the assumed optimal level, and 0.79 (95% CI 0.67 to 0.93) if it was below the assumed optimal level. Corresponding estimates for patient mortality were 1.43 (95% CI 1.18 to 1.73) and 0.78 (95% CI 0.60 to 1.00), respectively. As compared with the patients/nurse classification, models estimated on basis of the RAFAELA classification system generally provided larger effect sizes, greater statistical power and better model fit, although the difference was not very large. Net benefits as calculated on the basis of decision analysis did not provide any clear evidence on which measure to prefer.

CONCLUSIONS

We have demonstrated an association between daily workload per nurse and patient safety incidents and mortality. Current findings need to be replicated by future studies.

The association between nurse staffing and omissions in nursing care: A systematic review

AIMS

To identify nursing care most frequently missed in acute adult inpatient wards and to determine evidence for the association of missed care with nurse staffing.

BACKGROUND

Research has established associations between nurse staffing levels and adverse patient outcomes including in-hospital mortality. However, the causal nature of this relationship is uncertain and omissions of nursing care (referred as missed care, care left undone or rationed care) have been proposed as a factor which may provide a more direct indicator of nurse staffing adequacy.

DESIGN

Systematic review.

DATA SOURCES

We searched the Cochrane Library, CINAHL, Embase and Medline for quantitative studies of associations between staffing and missed care. We searched key journals, personal libraries and reference lists of articles.

REVIEW METHODS

Two reviewers independently selected studies. Quality appraisal was based on the National Institute for Health and Care Excellence quality appraisal checklist for studies reporting correlations and associations. Data were abstracted on study design, missed care prevalence and measures of association. Synthesis was narrative.

RESULTS

Eighteen studies gave subjective reports of missed care. Seventy-five per cent or more nurses reported omitting some care. Fourteen studies found low nurse staffing levels were significantly associated with higher reports of missed care. There was little evidence that adding support workers to the team reduced missed care.

CONCLUSIONS

Low Registered Nurse staffing is associated with reports of missed nursing care in hospitals. Missed care is a promising indicator of nurse staffing adequacy. The extent to which the relationships observed represent actual failures, is yet to be investigated.

The function of patient-centered care in mitigating the effect of nursing shortage on the outcomes of care

BACKGROUND

The shortage of nursing staff is a national and international issue. Inadequate number of hospital nurse staff leads to poor health care services. Yet the effects of patient-centeredness between the relationships of nursing shortage on the quality of care (QC) and patient safety (PS) have not been explored. The aim of this study was to examine the mediating effects of patient-centeredness on the relationship of nursing shortage on the QC and PS in the Medical and Surgical Wards, in Malaysian private hospitals.

METHOD

A descriptive, cross-sectional study was carried out on 12 private hospitals. Data was gathered, through a self- administered questionnaire, from 652 nurses, with a 61.8% response rate. Stratified simple random sampling was used to allow all nurses to participate in the study. Hayes PROCESS macro-regression analyses were conducted to explore the mediating effects of patient-centeredness on the relationships of hospital nurse staffing on the QC and PS.

RESULTS

Patient-centeredness mediated the relationships of hospital nurse staffing on both the QC (F = 52.73 and P = 0.000) and PS (F = 31.56 and P = 0.000).

CONCLUSION

Patient-centeredness helps to mitigate the negative associations of nursing shortage on the outcomes of care. The study provides a guide for hospital managers, leaders, decision-makers, risk managers, and policymakers to maintain adequate staffing level and instill the culture of patient-centeredness in order to deliver high quality and safer care.

Is the effectiveness of memory assessment services associated with their structural and process characteristics?

OBJECTIVES

The aim of this study was to investigate whether structural and process characteristics of memory assessment services (MASs) are associated with outcomes (changes in patients' health-related quality of life (HRQL), carers' HRQL and carers' burden) over the first 6 months following the first appointment.

METHODS

Data from 785 patients referred to 69 MASs and 511 of their lay carers, collected at the first appointment and 6 months later. Data on MAS characteristics were collected using a questionnaire at baseline. We used multilevel linear regression models to explore the associations of patients' HRQL and carers' outcomes with structural and process characteristics of MASs. Analyses were conducted on the full sample of patients and carers, and separately on those patients diagnosed with dementia.

RESULTS

None of the structural (skill mix, workload, volume, provision of clinical assessments and provision of psychosocial support) or process (waiting time, length and number of appointments, anti-dementia drug use and psychosocial interventions use) characteristics included in the analyses were associated with patients' or carers' outcomes at 6 months, apart from the presence of allied health professionals (AHPs), which was associated with a DEMQOL score 2.7 points higher. When only those with a diagnosis of dementia were considered, the association with presence of AHPs was no longer observed.

CONCLUSIONS

Apart from involving AHPs, alterations to the way MASs are structured or function appear unlikely to improve their effectiveness in improving patients' and carers' HRQL. It is possible that the characteristics of MASs may influence patients' and carers' experience, but this was not studied. Copyright © 2017 John Wiley & Sons, Ltd.

Association between workload of the nursing staff and patient safety outcomes

OBJECTIVE To describe the workload of the nursing team and relate it with patient safety outcomes in clinical and surgical inpatient units of a university hospital. METHOD Cross-sectional study, carried out from October 2013 to September 2015. The factor under study was the workload, expressed as the ratio between the mean number of patients and the number of nursing professionals in 24 hours and in the day shifts. RESULTS The sample consisted of 157,481 patients, 502 nursing professionals and 264 observations of safety outcomes. The ratios of patients per nurse and per nursing technician in day shifts indicate a mean estimate of 14-15 and 5-6 patients per professional, respectively. There was a significant association between the workloads in the inpatient units and average length of stay, urinary infection related to invasive procedure and the satisfaction of patients with nursing care. CONCLUSION The increase in the workload of the nursing team had an impact on quality of care and safety for patients. An adequate staffing promotes a safer care environment.

What impact does nursing care left undone have on patient outcomes? Review of the literature

Aims and objectives

Systematic review of the impact of missed nursing care on outcomes in adults, on acute hospital wards and in nursing homes.

Background

A considerable body of evidence supports the hypothesis that lower levels of registered nurses on duty increase the likelihood of patients dying on hospital wards, and the risk of many aspects of care being either delayed or left undone (missed). However, the direct consequence of missed care remains unclear.

Design

Systematic review.

Methods

We searched Medline (via Ovid), CINAHL (EBSCOhost) and Scopus for studies examining the association of missed nursing care and at least one patient outcome. Studies regarding registered nurses, healthcare assistants/support workers/nurses’ aides were retained. Only adult settings were included. Because of the nature of the review, qualitative studies, editorials, letters and commentaries were excluded. PRISMA guidelines were followed in reporting the review.

Results

Fourteen studies reported associations between missed care and patient outcomes. Some studies were secondary analyses of a large parent study. Most of the studies used nurse or patient reports to capture outcomes, with some using administrative data. Four studies found significantly decreased patient satisfaction associated with missed care. Seven studies reported associations with one or more patient outcomes including medication errors, urinary tract infections, patient falls, pressure ulcers, critical incidents, quality of care and patient readmissions. Three studies investigated whether there was a link between missed care and mortality and from these results no clear associations emerged.

Conclusions

The review shows the modest evidence base of studies exploring missed care and patient outcomes generated mostly from nurse and patient self‐reported data. To support the assertion that nurse staffing levels and skill mix are associated with adverse outcomes as a result of missed care, more research that uses objective staffing and outcome measures is required.

Relevance to clinical practice

Although nurses may exercise judgements in rationing care in the face of pressure, there are nonetheless adverse consequences for patients (ranging from poor experience of care to increased risk of infection, readmissions and complications due to critical incidents from undetected physiological deterioration). Hospitals should pay attention to nurses’ reports of missed care and consider routine monitoring as a quality and safety indicator.

Post-operative mortality, missed care and nurse staffing in nine countries: A cross-sectional study

Background

Variation in post-operative mortality rates has been associated with differences in registered nurse staffing levels. When nurse staffing levels are lower there is also a higher incidence of necessary but missed nursing care. Missed nursing care may be a significant predictor of patient mortality following surgery.

Aim

Examine if missed nursing care mediates the observed association between nurse staffing levels and mortality.

Method

Data from the RN4CAST study (2009–2011) combined routinely collected data on 422,730 surgical patients from 300 general acute hospitals in 9 countries, with survey data from 26,516 registered nurses, to examine associations between nurses’ staffing, missed care and 30-day in-patient mortality. Staffing and missed care measures were derived from the nurse survey. A generalized estimation approach was used to examine the relationship between first staffing, and then missed care, on mortality. Bayesian methods were used to test for mediation.

Results

Nurse staffing and missed nursing care were significantly associated with 30-day case-mix adjusted mortality. An increase in a nurse’s workload by one patient and a 10% increase in the percent of missed nursing care were associated with a 7% (OR 1.068, 95% CI 1.031–1.106) and 16% (OR 1.159 95% CI 1.039–1.294) increase in the odds of a patient dying within 30 days of admission respectively. Mediation analysis shows an association between nurse staffing and missed care and a subsequent association between missed care and mortality.

Conclusion

Missed nursing care, which is highly related to nurse staffing, is associated with increased odds of patients dying in hospital following common surgical procedures. The analyses support the hypothesis that missed nursing care mediates the relationship between registered nurse staffing and risk of patient mortality. Measuring missed care may provide an ‘early warning’ indicator of higher risk for poor patient outcomes.

A program evaluation of the Patient CaringTouch System: A pre- and postimplementation assessment

BACKGROUND

The Patient CaringTouch System (PCTS) is an innovative, strategic and patient-centric framework developed by the Army Nurse Corps for nursing care delivery that is designed to reduce nursing care variation and improve patient and nurse outcomes.

PURPOSE

This manuscript describes a program evaluation of the PCTS.

METHODS

A pre and post design was used to describe changes in patient and nursing measures following PCTS implementation.

DISCUSSION

Overall there was a good uptake of the PCTS; however, concurrent with initiation of the PCTS, declines in staffing levels and increases in patient acuity were noted. Medication administration error rates declined, but fall with injury rates increased. Pain reassessment following pain medication administration improved, as did several aspects of the nursing practice environment. Nurses' job dissatisfaction and intent to leave increased; however, potentially preventable losses decreased.

CONCLUSIONS

The program evaluation results will be used to target areas for improvement so that the PCTS may be sustained.

The association between higher nurse staffing standards in the fee schedules and the geographic distribution of hospital nurses: A cross-sectional study using nationwide administrative data

BACKGROUND

In Japan, the revision of the fee schedules in 2006 introduced a new category of general care ward for more advanced care, with a higher staffing standard, a patient-to-nurse ratio of 7:1. Previous studies have suggested that these changes worsened inequalities in the geographic distribution of nurses, but there have been few quantitative studies evaluating this effect. This study aimed to investigate the association between the distribution of 7:1 beds and the geographic distribution of hospital nursing staffs.

METHODS

We conducted a secondary data analysis of hospital reimbursement reports in 2012 in Japan. The study units were secondary medical areas (SMAs) in Japan, which are roughly comparable to hospital service areas in the United States. The outcome variable was the nurse density per 100,000 population in each SMA. The 7:1 bed density per 100,000 population was the main independent variable. To investigate the association between the nurse density and 7:1 bed density, adjusting for other variables, we applied a multiple linear regression model, with nurse density as an outcome variable, and the bed densities by functional category of inpatient ward as independent variables, adding other variables related to socio-economic status and nurse workforce. To investigate whether 7:1 bed density made the largest contribution to the nurse density, compared to other bed densities, we estimated the standardized regression coefficients.

RESULTS

There were 344 SMAs in the study period, of which 343 were used because of data availability. There were approximately 553,600 full time equivalent nurses working in inpatient wards in hospitals. The mean (standard deviation) of the full time equivalent nurse density was 426.4 (147.5) and for 7:1 bed density, the figures were 271.9 (185.9). The 7:1 bed density ranged from 0.0 to 1,295.5. After adjusting for the possible confounders, there were more hospital nurses in the areas with higher densities of 7:1 beds (standardized regression coefficient 0.62, 95% confidence interval 0.56-0.68).

CONCLUSION

We found that the 7:1 nurse staffing standard made the largest contribution to the geographic distribution of hospital nurses, adjusted for socio-economic status and nurse workforce-related factors.

The Impact of Heavy Perceived Nurse Workloads on Patient and Nurse Outcomes

This study investigated the relationships between seven workload factors and patient and nurse outcomes. (1) Background: Health systems researchers are beginning to address nurses’ workload demands at different unit, job and task levels; and the types of administrative interventions needed for specific workload demands. (2) Methods: This was a cross-sectional correlational study of 472 acute care nurses from British Columbia, Canada. The workload factors included nurse reports of unit-level RN staffing levels and patient acuity and patient dependency; job-level nurse perceptions of heavy workloads, nursing tasks left undone and compromised standards; and task-level interruptions to work flow. Patient outcomes were nurse-reported frequencies of medication errors, patient falls and urinary tract infections; and nurse outcomes were emotional exhaustion and job satisfaction. (3) Results: Job-level perceptions of heavy workloads and task-level interruptions had significant direct effects on patient and nurse outcomes. Tasks left undone mediated the relationships between heavy workloads and nurse and patient outcomes; and between interruptions and nurse and patient outcomes. Compromised professional nursing standards mediated the relationships between heavy workloads and nurse outcomes; and between interruptions and nurse outcomes. (4) Conclusion: Administrators should work collaboratively with nurses to identify work environment strategies that ameliorate workload demands at different levels.

Determining priorities for research to improve fundamental care on hospital wards

PLAIN ENGLISH SUMMARY

The aim of this project was to find out the priorities for research that could improve fundamental care. 'Fundamental care' covers all aspects of basic care in hospital wards, such as helping with core physical needs, building positive relationships and keeping patients safe.By setting the priorities with patients, carers, the public and health care professionals, research can look at the issues that really matter to people who are receiving or delivering care in hospital wards.Previously, prioritisation exercises have started with a menu of options and asked people to choose from that list. They have also been focused on specific health conditions. Traditionally, there has been little opportunity for patients, carers and the public to contribute to identifying the issues to be prioritised.To develop the priorities for research, we started by exploring what is meant by 'fundamental care', looking at patient and carer accounts and academic and policy reports. Patients, carers, staff, and members of the public were consulted via surveys, interviews and group discussions to share experiences and issues.A list of 15 topics was identified based on what was most commonly mentioned by patients, carers and healthcare professionals as well as what was practical for the CLAHRC Wessex team to research. A workshop with patients, carers and healthcare professionals was held, to decide the top 5 areas.The five priority areas identified were:Nurse staffingIndividualised patient careStaff communicationStaff attitudes and relationships with patientsInformation about care/communication.

ABSTRACT

Background The provision of high quality fundamental care in hospitals is a top priority for the NHS. Recent reports and investigations highlight that at times care has fallen below standard. It is unclear what research should be prioritised to improve care. The aim of this work is to involve patients/carers/public, clinicians and other stakeholders to identify issues that are priorities for research which could improve fundamental care in hospital. Methods Patient and public involvement was integral to this project, with a patient leader/service user being a member of the core team who designed and executed this research. After consideration of existing priority setting approaches, we developed an inclusive approach which consisted of six main phases: 1) Development of a conceptual framework of fundamental care, based on reports and literature 2) Consultation with a wide range of stakeholders through a survey, focus groups and interviews 3) Identifying themes from the responses to the consultation phase (76 themes identified) 4) Analysis to identify the 15 topics most frequently cited 5) Prioritisation of the top 15 themes through a half day workshop, which led to a shortlist of five themes 6) Development of the top 5 themes into research areas. Results Three hundred forty stakeholders (29 % of whom were patients/carers/public) completed the consultation survey. Analysis of the survey responses and of focus groups and interviews led us to identify 15 high scoring themes. We presented these at the prioritisation workshop, attended by 39 participants (23 of whom patients/carers/public). After a voting exercise, the 5 top research priorities which emerged were: nurse staffing; individualised patient care; staff communication; staff attitudes and relationships with patients; and information about care. Conclusions We involved a range of stakeholders in identifying topics for research to improve fundamental care and asked them to prioritise these. The process provided a means of reaching consensus as to the important issues for future research to focus on to improve fundamental care on hospital wards.