Development and validation of a risk score to predict unplanned hospital readmissions in ICU survivors: A data linkage study

BACKGROUND

Intensive Care Unit (ICU) follow-up clinics are growing in popularity internationally; however, there is limited evidence as to which patients would benefit most from a referral to this service.

OBJECTIVES

The objective of this study was to develop and validate a model to predict which ICU survivors are most likely to experience an unplanned hospital readmission or death in the year after hospital discharge and derive a risk score capable of identifying high-risk patients who may benefit from referral to follow-up services.

METHODS

A multicentre, retrospective observational cohort study using linked administrative data from eight ICUs was conducted in the state of New South Wales, Australia. A logistic regression model was developed for the composite outcome of death or unplanned readmission in the 12 months after discharge from the index hospitalisation.

RESULTS

12,862 ICU survivors were included in the study, of which 5940 (46.2%) patients experienced unplanned readmission or death. Strong predictors of readmission or death included the presence of a pre-existing mental health disorder (odds ratio [OR]: 1.52, 95% confidence interval [CI]: 1.40-1.65), severity of critical illness (OR: 1.57, 95% CI: 1.39-1.76), and two or more physical comorbidities (OR: 2.39, 95% CI: 2.14-2.68). The prediction model demonstrated reasonable discrimination (area under the receiver operating characteristic curve: 0.68, 95% CI: 0.67-0.69) and overall performance (scaled Brier score: 0.10). The risk score was capable of stratifying patients into three distinct risk groups-high (64.05% readmitted or died), medium (45.77% readmitted or died), and low (29.30% readmitted or died).

CONCLUSIONS

Unplanned readmission or death is common amongst survivors of critical illness. The risk score presented here allows patients to be stratified by risk level, enabling targeted referral to preventative follow-up services.

Data cleaning for clinician researchers: Application and explanation of a data-quality framework

BACKGROUND

Data cleaning is the series of procedures performed before a formal statistical analysis, with the aim of reducing the number of error values in a dataset and improving the overall quality of subsequent analyses. Several study-reporting guidelines recommend the inclusion of data-cleaning procedures; however, little practical guidance exists for how to conduct these procedures.

OBJECTIVES

This paper aimed to provide practical guidance for how to perform and report rigorous data-cleaning procedures.

METHODS

A previously proposed data-quality framework was identified and used to facilitate the description and explanation of data-cleaning procedures. The broader data-cleaning process was broken down into discrete tasks to create a data-cleaning checklist. Examples of the how the various tasks had been undertaken for a previous study using data from the Australia and New Zealand Intensive Care Society Adult Patient Database were also provided.

RESULTS

Data-cleaning tasks were described and grouped according to four data-quality domains described in the framework: data integrity, consistency, completeness, and accuracy. Tasks described include creation of a data dictionary, checking consistency of values across multiple variables, quantifying and managing missing data, and the identification and management of outlier values. The data-cleaning task checklist provides a practical summary of the various aspects of the data-cleaning process and will assist clinician researchers in performing this process in the future.

CONCLUSIONS

Data cleaning is an integral part of any statistical analysis and helps ensure that study results are valid and reproducible. Use of the data-cleaning task checklist will facilitate the conduct of rigorous data-cleaning processes, with the aim of improving the quality of future research.

Nurse/midwife-to-patient ratios: A scoping review

BACKGROUND

A significant body of work has linked high nurse or midwife workload to negative patient outcomes. Anecdotal reports suggest that mandated ratio models enhance patient care and improve nurse job satisfaction. However, there is limited focused research.

OBJECTIVE

To identify key outcomes, implementation processes, and research needs regarding nurse/midwife-to-patient ratios in the Australian healthcare context.

DESIGN

Scoping review.

METHODS

Data sources were CINAHL, Open Dissertations, Medline, and Scopus. 289 articles screened, and 53 full text documents independently assessed against criteria by two reviewers and conflicts resolved by a third reviewer, using Covidence™. Three studies were included in this review.

RESULTS

Studies focused on nurse (job satisfaction, burnout), patient (mortality, readmission, length of stay) and system (costs) outcomes with limited information on implementation processes and no midwifery research.

CONCLUSIONS

Ratios provide benefits for patients, nurses, and hospitals although there is limited research in Australia. Implementation was poorly reported..

The Impact of COVID-19 Visitor Restrictions on Clinical Cancer Nurses

OBJECTIVES

To explore the impact of visitor restrictions on clinical cancer nurses, their roles and duties, and the coping strategies used to address the impact.

DATA SOURCES

Semistructured qualitative interviews were conducted through purposive sampling with nurses working in a clinical role within cancer services at the study site for at least 1 year. Interviews were recorded and transcribed. Textual data transcribed from interviews were analyzed for themes using NVivo version 12 software, following Braun and Clarke's six phases of thematic analysis.

CONCLUSION

Visitor restrictions implemented due to COVID-19 had a significant impact on clinical cancer nurses. The study found evidence of moral injury and conflict-within the role of the nurse, the implementation of organizational policies, and nurses' professional identity and personal beliefs. Despite this adversity, nurses remained committed to their clinical practice.

IMPLICATIONS FOR NURSING PRACTICE

Changes to nurses' roles and the practice environment have potentially significant impact on well-being and retention. To ensure that nurses can continue to provide high-quality nursing care in challenging environments, organizations must minimize this impact. Consistent communication and support activities, including recognizing and responding appropriately to situations, may be used in the reduction of potential moral injury and stress.

Association Between Preexisting Mental Health Disorders and Adverse Outcomes in Adult Intensive Care Patients: A Data Linkage Study

OBJECTIVES

Mental illness is known to adversely affect the physical health of patients in primary and acute care settings; however, its impact on critically ill patients is less well studied. This study aimed to determine the prevalence, characteristics, and outcomes of patients admitted to the ICU with a preexisting mental health disorder.

DESIGN

A multicenter, retrospective cohort study using linked data from electronic ICU clinical progress notes and the Australia and New Zealand Intensive Care Society Adult Patient Database.

SETTING/PATIENTS

All patients admitted to eight Australian adult ICUs in the calendar year 2019. Readmissions within the same hospitalization were excluded.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

Natural language processing techniques were used to classify preexisting mental health disorders in participants based on clinician documentation in electronic ICU clinical progress notes. Sixteen thousand two hundred twenty-eight patients (58% male) were included in the study, of which 5,044 (31.1%) had a documented preexisting mental health disorder. Affective disorders were the most common subtype occurring in 2,633 patients (16.2%), followed by anxiety disorders, occurring in 1,611 patients (9.9%). Mixed-effects regression modeling found patients with a preexisting mental health disorder stayed in ICU 13% longer than other patients (β-coefficient, 0.12; 95% CI, 0.10-0.15) and were more likely to experience invasive ventilation (odds ratio, 1.42; 95% CI, 1.30-1.56). Severity of illness and ICU mortality rates were similar in both groups.

CONCLUSIONS

Patients with preexisting mental health disorders form a significant subgroup within the ICU. The presence of a preexisting mental health disorder is associated with greater ICU length of stay and higher rates of invasive ventilation, suggesting these patients may have a different clinical trajectory to patients with no mental health history. Further research is needed to better understand the reasons for these adverse outcomes and to develop interventions to better support these patients during and after ICU admission.

Development and psychometric testing of the gender misconceptions of men in nursing (GEMINI) scale among nursing students

BACKGROUND

Misconceptions about men in nursing may influence recruitment and retention, further perpetuating the gender diversity imbalance in the nursing workforce. Identifying misconceptions and implementing early intervention strategies to address these deep-rooted stereotypes remain challenging but is considered critical to support students who are commencing a nursing career.

OBJECTIVE

To develop and evaluate the psychometric properties of the 'Gender Misconceptions of meN in nursIng (GEMINI) Scale.

DESIGN

Cross-sectional survey.

METHODS

Pre-registration nursing students enrolled in undergraduate nursing programs across 16 nursing institutions in Australia were surveyed from July to September 2021. The 17-item self-report GEMINI Scale measured the gender misconceptions of men in nursing.

RESULTS

Of the 1410 completed surveys, data from 683 (45%) women were used for exploratory factor analysis showing a one factor structure, while data from 727 men (47%) were used for confirmatory factor analysis of the 17-item GEMINI Scale, which showed a good model fit. The scale demonstrated high internal consistency (Cronbach's alpha of 0.892). Men were found to have higher gender misconceptions (p < 0.001) while respondents who: a) identified nursing as their first career choice (p = 0.002); b) were in their final year of program enrolment (p = 0.016); and c) engaged in health-related paid work (p = 0.002) had lower gender misconceptions.

CONCLUSION

The GEMINI Scale is a robust, valid, reliable, and easy to administer tool to assess misconceptions about men in nursing, which may potentially influence academic performance and retention. Identifying and addressing specific elements of misconceptions could inform targeted strategies to support retention and decrease attrition among these students.

IMPACT STATEMENT

Genderism harms nursing, as well as the men and women working in the profession. Recruitment and retention of men into nursing is needed to cultivate male role models and diversify the workforce, however this is impeded by negative portrayals in popular culture and misconceptions entrenched in society.

Maternal incarceration: Impact on parent-child relationships

Female incarceration is rising steeply in Australia and other high-income countries. The majority of incarcerated women are mothers. Their children represent a particularly vulnerable group, often subject to adverse experiences due to their family's disadvantaged circumstances involving inadequate housing, food insecurity, poverty, poor health, a lack of personal safety due to violence and resulting trauma. This qualitative study explores parenting experiences of incarcerated mothers separated from their children. Interviews involved 65 mothers in three Australian prisons and 19 stakeholders providing correctional services and support for incarcerated women. Data were analysed using interpretive description. Mothers' accounts highlighted frustrations resulting from trying to maintain relationships with their children, often exacerbating their separation and compounding parenting difficulties. Two major themes emerged from the data: 'protecting their children' and 'at the mercy of the system'. Mothers described how they tried to protect their children from the consequences of their incarceration, yet many of the correctional system processes and procedures made it even harder to maintain connection. Incarcerated mothers need support in their parenting role. Ideally, this support should commence during incarceration. Further, changes within prison routines could enhance mothers' efforts to keep in contact with their children, through visits and phone calls.

Extending the role of nursing assistants in mental health inpatient settings: A multi-method study

With continued growth in the demand for nursing care, many organizations have incorporated nursing assistants into the acute care workforce. However, role descriptions are often generic and do not provide clarity in specialist areas such as mental health inpatient settings. Issues have been noted regarding the role of assistants, delegation, and their integration with the nursing team. This study extended an existing set of care activities and explored the perceptions of nursing assistants and registered nurses regarding these activities. A modified Delphi approach added 14 new care activities for nursing assistants. A follow-up survey found significant differences between nursing assistants and registered nurses regarding utilization of the activities, delegation, teamwork, and role clarity. Future research must incorporate the perspectives of those with lived experience of mental health issues, and develop an understanding of the interactions between nursing assistant care activities and other factors such as local supports, skillmix, and the practice environment, as these may impact how an organization can introduce nursing assistants to specialty areas while maintaining consumer and staff safety.

The impact of an undergraduate students' culture on their learning about mental health: A scoping review

Mental disorders are highly prevalent. This necessitates undergraduate students in health-related courses are provided with the knowledge, skills, and attitudes to deliver safe care. Research confirms undergraduate health students maintain discriminative, stigmatizing, and inaccurate beliefs and attitudes toward those experiencing mental disorders. However, there is a paucity of research exploring how culture influences these beliefs. This scoping review addressed the question: 'What is the impact of an undergraduate student's culture on their learning about mental health?' A systematic search was undertaken of the MEDLINE, CINAHL, Scopus, PsycINFO, and ERIC databases. Results indicate variance between students' cultural beliefs in their attitudes toward and knowledge of mental disorders and understanding of interventions and treatment. None of the identified studies reviewed the ramifications for pedagogy beyond anecdotal suggestions. Educators need to acknowledge the potential impact that students' cultural beliefs have on their learning about mental health and consider appropriate learning activities to acknowledge the role of culture. Research of the impact of undergraduate students' culture on their learning about mental health will provide an evidence base for the development of these learning activities.

Pre-existing mental health disorders in patients admitted to the intensive care unit: A systematic review and meta-analysis of prevalence

AIMS

To determine the reported prevalence rate of pre-existing mental health disorders in patients admitted to adult ICUs and identify the most commonly occurring types of these disorders.

DESIGN

Systematic review and meta-analysis.

DATA SOURCES

Five electronic databases were searched from 1 January 2000 -15 April 2020. Google Scholar was used to perform forwards citation searching.

METHODS

This review was conducted in line with the PRISMA guidelines and protocol registered with PROSPERO CRD42020181818. Meta-analyses were performed using the quality effects model to calculate weighted pooled prevalence estimates and heterogeneity was tested using the I² statistic.

RESULTS

Seven articles were included in the final review and meta-analysis (143,179 participants). Identified prevalence rates varied considerably, ranging from 6.2-28.0%, reflecting variation in each study's clinical context, as well as different patient selection and identification methodologies. The pooled prevalence rate of all pre-existing mental health disorders was 19.4% (95% CI 8.9-32.6%). Depression was the most common subtype, accounting for an estimated 60.5% (95% CI 54.4-66.5%) of identified mental health disorders. All analyses showed significant heterogeneity with I²  > 95%.

CONCLUSION

Approximately 19% of adult ICU patients have a history of a mental health disorder, most commonly depression. Further research is needed to improve the accuracy of this estimate as well as determine the best identification method.

IMPACT

This study has demonstrated that patients with pre-existing mental health disorders, particularly depression, constitute a significant subgroup in ICU. Given that the presence of a pre-existing mental health disorder appears to confer an increased mortality risk following ICU discharge, clinicians need to be made aware of this group of patients to provide additional support. Further research is needed to more accurately quantify this vulnerable group and establish methods to enable clinicians to readily identify and refer these patients for appropriate follow-up treatment.

Intrahospital transfers and the impact on nursing workload

AIMS AND OBJECTIVES

To determine the rate of patient moves and the impact on nurses' time.

BACKGROUND

Bed shortages and strategies designed to increase patient flow have led to a global increase in patient transfers between wards. The impact of transferring patients between wards and between beds within a ward on nurses' workload has not previously been measured.

DESIGN

A two-stage sequential study. Retrospective analysis of hospital data and a prospective observational-timing study.

METHODS

Secondary analysis of an administrative data set to inform the rate of ward and bed transfers (n = 34,715) was undertaken followed by an observational-timing study of nurses' activities associated with patient transfers (n = 75).

RESULTS

Over 10,000 patients were moved 34,715 times in 1 year which equates to an average of 2.4 transfers per patient. On average, patient transfers took 42 min and bed transfers took 11 min of nurses' time. Based on the frequency of patient moves, 11.3 full-time equivalent nurses are needed to move patients within the site hospital each month.

CONCLUSION

Transferring patients is workload intensive on nurses' time and should be included in nursing workload measurement systems.

RELEVANCE TO CLINICAL PRACTICE

Nurses at the site hospital spend over 1700 hr each month on activities associated with transferring patients, meaning that less time is available for nursing care.

Changes to nurses' practice environment over time

AIMS

To examine changes in the nursing practice environment, retention-related factors, unit stability and patient care tasks delayed or left undone, over two periods between 2004 and 2013.

BACKGROUND

Positive nurse practice environments have been linked to nurse retention and care quality outcomes.

METHODS

The collection of the Practice Environment Scale of the Nursing Work Index, job satisfaction, intent to leave, unit instability and tasks delayed or not done at six acute-care hospitals across three Australian states, in two waves between 2004 and 2013; results from the two waves are compared.

RESULTS

On average, practice environment scores declined slightly; nurses reported a greater difficulty in finding another nursing position, lower intent to leave their current job and greater instability in their current position. Rates of delayed tasks increased over the period, whereas rates of tasks left undone have decreased over the period.

CONCLUSIONS

The decline in nurses' perceptions of the quality of the practice environment is disappointing, particularly given the protracted workforce shortages that have persisted. Significant organisational restructuring and turnover of nurse executives may have contributed to this decline.

IMPLICATION FOR NURSING MANAGEMENT

Managers need to apply existing evidence to improve nurse practice environments and manage instability.

The rate and cost of nurse turnover in Australia

Nurse turnover is a critical issue facing workforce planners across the globe, particularly in light of protracted and continuing workforce shortages. An ageing population coupled with the rise in complex and chronic diseases, have contributed to increased demands placed on the health system and importantly, nurses who themselves are ageing. Costs associated with nurse turnover are attracting more attention; however, existing measurements of turnover show inconsistent findings, which can be attributed to differences in study design, metrics used to calculate turnover and variations in definitions for turnover. This paper will report the rates and costs of nurse turnover across three States in Australia.

The Use of Unregulated Staff: Time for Regulation?

Internationally, shortages in the nursing workforce, escalating patient demands, and financial constraints within the health system have led to the growth of unlicensed nursing support workers. Recently, in relation to the largest publicly funded health system (National Health Service), it was reported that extensive substitution of registered nurses with unskilled nursing support workers resulted in inadequate patient care, increased morbidity and mortality rates, and negative nurse outcomes. We argue that it is timely to consider regulation of nursing support workers with their role and scope of practice clearly defined. Further, the addition of these workers in a complementary model of care (rather than substitutive model) should also be explored in future research, in terms of impact on patient and nurse outcomes.

Ranolazine stabilizes cardiac ryanodine receptors: a novel mechanism for the suppression of early afterdepolarization and torsades de pointes in long QT type 2

BACKGROUND

Ranolazine (Ran) is known to inhibit multiple targets, including the late Na(+)current, the rapid delayed rectifying K(+)current, the L-type Ca(2+)current, and fatty acid metabolism. Functionally, Ran suppresses early afterdepolarization (EADs) and torsades de pointes (TdP) in drug-induced long QT type 2 (LQT2) presumably by decreasing intracellular [Na(+)](i) and Ca(2+)overload. However, simulations of EADs in LQT2 failed to predict their suppression by Ran.

OBJECTIVE

To elucidate the mechanism(s) whereby Ran alters cardiac action potentials (APs) and cytosolic Ca(2+)transients and suppresses EADs and TdP in LQT2.

METHODS

The known effects of Ran were included in simulations (Shannon and Mahajan models) of rabbit ventricular APs and Ca(2+)transients in control and LQT2 models and compared with experimental optical mapping data from Langendorff rabbit hearts treated with E4031 (0.5 μM) to block the rapid delayed rectifying K(+)current. Direct effects of Ran on cardiac ryanodine receptors (RyR2) were investigated in single channels and changes in Ca(2+)-dependent high-affinity ryanodine binding.

RESULTS

Ran (10 μM) alone prolonged action potential durations (206 ± 4.6 to 240 ± 7.8 ms; P <0.05); E4031 prolonged action potential durations (204 ± 6 to 546 ± 35 ms; P <0.05) and elicited EADs and TdP that were suppressed by Ran (10 μM; n = 7 of 7 hearts). Simulations (Shannon but not Mahajan model) closely reproduced experimental data except for EAD suppression by Ran. Ran reduced open probability (P(o)) of RyR2 (half maximal inhibitory concentration = 10 ± 3 μM; n = 7) in bilayers and shifted half maximal effective concentration for Ca(2+)-dependent ryanodine binding from 0.42 ± 0.02 to 0.64 ± 0.02 μM with 30 μM Ran.

CONCLUSIONS

Ran reduces P(o) of RyR2, desensitizes Ca(2+)-dependent RyR2 activation, and inhibits Ca(i) oscillations, which represents a novel mechanism for its suppression of EADs and TdP.

Effect of hyperventilation on brain tissue oxygenation and cerebrovenous PO2 in rats

Previous studies have shown that cortical tissue oxygenation is impaired during hyperventilation. However, it is important to quantify the effect of hyperventilation on brain tissue PO(2) and cerebrovenous PO(2) simultaneously especially since cerebral venous oxygenation is often used to assess brain tissue oxygenation. The present study was designed to measure the sagittal sinus PO(2) (PvO(2)), brain tissue PO(2) in the thalamus (PtO(2)), and brain temperature (Bt) simultaneously during acute hyperventilation. Isoflurane-anesthetized rats were hyperventilated for 10 min during which time the arterial carbon dioxide tension (PaCO(2)) dropped from 40.3+4.9 mmHg to 23.5+2.8 mmHg. PtO(2) declined from 26.0+/-4.2 mmHg to 14.8+/-5.2 mmHg (P=0.004) while brain temperature decreased from 36.5+0.3 degrees C to 36.2+0.3 degrees C (P=0.02). However, PvO(2) and arterial blood pressure (BP) did not change during hyperventilation. The maintenance of PvO(2) when perfusion is thought to decline and PtO(2) decreases suggests that there may be a diffusion limitation, possibly due to selective perfusion. Therefore, cerebrovenous PO(2) may not give a good assessment of brain tissue oxygenation especially in conditions of acute hyperventilation, and deeper brain regions other than the cortex also show impaired tissue oxygenation following hyperventilation.

Visual, auditory and somatosensory evoked responses in patients with cerebrovascular disorders

A diagnostic evoked response battery, consisting of visual evoked responses to flashes and to a checkerboard pattern, auditory evoked responses to three different tones and somatosensory evoked responses to left, right and bilateral median nerve stimulation, was administered to 20 patients with strokes, and compared with 20 normal control subjects. Recordings were obtained at C3, C4, O1, O2, T3 and T4. Evoked responses were found to be of lower amplitudes and lower amplitudes and lower waveform symmetry (expressed by low correlation coefficients between left and right homologous areas) in the patients than in normal subjects. A discriminant equation with 17 variates was computed to separate the two groups. One patient (5%) and 2 (10%) normal subjects were misclassified. Comparison between patients with left or right lesions showed that somatosensory and auditory evoked responses were very useful for identification of the affected side. Quantitative study of evoked responses to different types of stimuli and sensory modalities provides a sensitive method for the evaluation of brain function in such patients. This technique gives higher accuracy than the routine EEG examination in terms of both the percentage of dectection and the accuracy of localization of the affected side.