Should we all die asleep? The problem of the normalization of palliative sedation.

Palliative sedation is a medical intervention to manage distress in dying patients, by reducing consciousness when symptom-directed therapies fail. Continuous deep sedation is ethically sensitive because it may shorten life and completely prevents communication. But sedation short of this is also common. There has been a steady increase in the use of sedation over recent decades. Sedation may have become a means to die while sleeping, rather than a method of last resort to alleviate suffering. Sedation may be requested or expected by patients, families or staff. The need for sedation may be being interpreted more loosely. The acceptance of a 'tolerable amount of discomfort' may have lost ground to a desire to get the final phase over with quickly. Sedation is not always a bad thing. Medical care is otherwise unable to completely control all distressing symptoms in every patient. Sedation may result from other necessary symptom control drugs. Dying when sedated can be seen by as 'peaceful'. We feel it is necessary, however, to highlight three caveats: the need to manage expectations, the cost in terms of loss of communication, and the grey area between continuous deep sedation and euthanasia. We conclude that there may be good grounds for sedation in palliative care, and in some cases, continuous deep sedation may be used as a last resort. But the criteria of necessary and proportionate drug treatment should remain. The normalisation of sedation into dying while sleeping should be resisted.

Experiences and understanding of apathy in people with neurocognitive disorders and their carers: a qualitative interview study.

BACKGROUND: apathy, defined as reduced goal-directed activity, interests and emotion, is highly prevalent in neurocognitive disorders (NCDs). Apathy has important consequences for the individuals who experience it and their carers, yet the lived experiences of apathy in this population are not well understood. OBJECTIVE: to explore how people with NCDs and their carers understand and experience apathy. METHOD: in-depth semi-structured interviews were conducted in participants' homes. Sixteen people with NCDs (dementia or mild cognitive impairment) and 14 carers, living in four geographical areas of England, took part. Interviews were audio-recorded and transcribed verbatim. Transcripts were analysed using reflexive thematic analysis. RESULTS: four themes were generated: 'Apathy is Poorly Understood'; 'Too much trouble: Mediating Effort and Outcome'; 'Preserving Identity in the Face of Loss of Capability and Autonomy' and 'Opportunity and Exclusion'. CONCLUSION: apathy is experienced as an understandable response to the everyday struggle people with NCDs face to preserve identity in the face of threats to capability and autonomy and is exacerbated by the lack of support and opportunities. Social and environmental modifications may help reduce apathy. In line with previous qualitative research, this challenges the dominant view of apathy as a neuropsychiatric symptom that excludes the social-environmental context.

Chronic pain in people living with dementia: challenges to recognising and managing pain, and personalising intervention by phenotype.

Pain is common in people with dementia, and pain can exacerbate the behavioural and psychological symptoms of dementia. Effective pain management is challenging, not least in people with dementia. Impairments of cognition, communication and abstract thought can make communicating pain unreliable or impossible. It is unclear which biopsychosocial interventions for pain management are effective in people with dementia, and which interventions for behavioural and psychological symptoms of dementia are effective in people with pain. The result is that drugs, physical therapies and psychological therapies might be either underused or overused. People with dementia and pain could be helped by assessment processes that characterise an individual's pain experience and dementia behaviours in a mechanistic manner, phenotyping. Chronic pain management has moved from a 'one size fits all' approach, towards personalised medicine, where interventions recommended for an individual depend upon the key mechanisms underlying their pain, and the relative values they place on benefits and adverse effects. Mechanistic phenotyping through careful personalised evaluation would define the mechanisms driving pain and dementia behaviours in an individual, enabling the formulation of a personalised intervention strategy. Central pain processing mechanisms are particularly likely to be important in people with pain and dementia, and interventions to accommodate and address these may be particularly helpful, not only to relieve pain but also the symptoms of dementia.

The facilitators and barriers to improving functional activity and wellbeing in people with dementia: a qualitative study from the process evaluation of Promoting Activity, Independence and Stability in Early Dementia (PrAISED).

BACKGROUND: The PRomoting Activity, Independence and Stability in Early Dementia (PrAISED) study delivered an exercise and functional activity programme to participants living with dementia. A Randomised Controlled Trial showed no measurable benefits in activities of daily living, physical activity or quality of life. OBJECTIVE: To explore participants' responses to PrAISED and explain why an intervention that might be expected to have produced measurable health gains did not do so. METHODS: A process evaluation using qualitative methods, comprising interviews and researcher notes. SETTING: Data were collected in participants' homes or remotely by telephone or videoconferencing. SAMPLE: A total of 88 interviews were conducted with 44 participants living with dementia (n = 32 intervention group; n = 12 control group) and 39 caregivers. A total of 69 interviews were conducted with 26 therapists. RESULTS: Participants valued the intervention as proactively addressing health issues that were of concern to them, and as a source of social contact, interaction, information and advice. Facilitators to achieving positive outcomes included perceiving progress towards desired goals, positive expectations, therapists' skills and rapport with participants, and caregiver support. Barriers included: cognitive impairment, which prevented independent engagement and carry-over between sessions; chronic physical health problems and intercurrent acute illness and injury; 'tapering' (progressively infrequent supervision intended to help develop habits and independent activity); and the COVID-19 pandemic. CONCLUSIONS: Self-directed interventions may not be appropriate in the context of dementia, even in the mild stages of the condition. Dementia-specific factors affected outcomes including caregiver support, rapport with therapists, availability of supervision, motivational factors and the limitations of remote delivery. The effects of cognitive impairment, multimorbidity and frailty overwhelmed any positive impact of the intervention. Maintenance of functional ability is valued, but in the face of inevitable progression of disease, other less tangible outcomes become important, challenging how we frame 'health gain' and trial outcomes.

Conversation Analysis Based Simulation (CABS): A method for improving communication skills training for healthcare practitioners.

BACKGROUND: Actors portraying simulated patients are widely used in communication skills training in healthcare, but debates persist over the authenticity of these interactions. However, healthcare professionals value simulation-based training because of the opportunity to think and react in real time, which alternatives cannot provide. OBJECTIVE: To describe a method for the use of simulation which maximises authenticity by grounding training in real, observed, patterns of patient communication. DESIGN: Naturally occurring care interactions were video recorded and analysed using conversation analysis (CA) to identify communication patterns. We focused on sites of recurring interactional trouble as areas for training, and identified more and less effective ways of dealing with these. We used the CA findings to train actors portraying simulated patients, based on the observed interactional patterns. SETTINGS AND PARTICIPANTS: Patients living with dementia and healthcare practitioners (HCPs) on two acute healthcare of the elderly wards in the English East Midlands. OUTCOME MEASURES: One month later HCPs reported using the skills learned in clinical practice. Masked-ratings of before and after simulated patient encounters confirmed these self-reports in relation to one key area of training. RESULTS: The Conversation Analysis Based Simulation (CABS) method used in this setting showed positive results across a range of quantitative and qualitative outcome measures. What is significant for the transferability of the method is that qualitative feedback from trainees highlighted the ability of the method to not only illuminate their existing effective practices, but to understand why these were effective and be able to articulate them to others. DISCUSSION/CONCLUSION: While the CABS method was piloted in the dementia care setting described here, it has potential applicability across healthcare settings where simulated consultations are used in communication skills training. Grounding simulated interaction in the observed communication patterns of real patients is an important means of maximising authenticity. PATIENT AND PUBLIC CONTRIBUTION: The VideOing to Improve dementia Communication Education (VOICE) intervention which piloted the CABS method was developed by a multidisciplinary team, including three carers of people with dementia. People living with dementia were involved in the rating of the before and after video simulation assessments.

The use of constant observation with people with dementia in hospitals: a mixed-methods systematic review.

OBJECTIVES: Constant observation is used in hospitals with people with dementia to manage their safety. However, opportunities for proactive care are not consistently recognised or utilised. A systematic review of constant observation was conducted to understand measures of effectiveness and facilitators for person-centred approaches. METHOD: Electronic databases were searched between 2010 and 2022. Four reviewers completed screening, quality assessments and data extraction with 20% checked for consistency. Findings were presented through narrative synthesis (PROSPERO registration CRD42020221078). FINDINGS: Twenty-four studies were included. Non-registered staff without specific training were the main providers of constant observation. Assessments and processes clarifying the level of observation encouraged reviews that linked initiation and discontinuation to a patient's changing needs. Examples of person-centred care, derived from studies of volunteers or staff employed to provide activities, demonstrated meaningful engagement could reassure a person and improve their mood. Proactive approaches that anticipated distress were thought to reduce behaviours that carried a risk of harm but supporting evidence was lacking. CONCLUSION: Non-registered staff are limited by organisational efforts to reduce risk, leading to a focus on containment. Trained staff who are supported during constant observation can connect with patients, provide comfort and potentially reduce behaviours that carry a risk of harm.

A systematic literature review and meta-analysis on digital health interventions for people living with dementia and Mild Cognitive Impairment.

OBJECTIVES: Digital health interventions enable services to support people living with dementia and Mild Cognitive Impairment (MCI) remotely. This literature review gathers evidence on the effectiveness of digital health interventions on physical, cognitive, behavioural and psychological outcomes, and Activities of Daily Living in people living with dementia and MCI. METHODS/DESIGN: Searches, using nine databases, were run in November 2021. Two authors carried out study selection/appraisal using the Critical Appraisal Skills Programme checklist. Study characteristics were extracted through the Cochrane handbook for systematic reviews of interventions data extraction form. Data on digital health interventions were extracted through the template for intervention description and replication (TIDieR) checklist and guide. Intervention effectiveness was determined through effect sizes. Meta-analyses were performed to pool data on intervention effectiveness. RESULTS: Twenty studies were included in the review, with a diverse range of interventions, modes of delivery, activities, duration, length, frequency, and intensity. Compared to controls, the interventions produced a moderate effect on cognitive abilities (SMD = 0.36; 95% CI = -0.03 to 0.76; I2  = 61%), and a negative moderate effect on basic ADLs (SMD = -0.40; 95% CI = -0.86 to 0.05; I2  = 69%). Stepping exergames generated the largest effect sizes on physical and cognitive abilities. Supervised training produced larger effect sizes than unsupervised interventions. CONCLUSION: Supervised intervention delivery is linked to greatest benefits. A mix of remote and face-to-face delivery could maximise benefits and optimise costs. Accessibility, acceptability and sustainability of digital interventions for end-users must be pre-requisites for the development of future successful services.

The UN Decade of healthy ageing: strengthening measurement for monitoring health and wellbeing of older people.

Over the past 100 years, life expectancy has increased dramatically in nearly all nations. Yet, these extra years of life gained have not all been healthy, particularly for older people aged 60 years and over. In 2020, the World Health Organisation (WHO) and United Nations (UN) member states embraced a sweeping 10-year global plan of action to ensure all older people can live long and healthy lives, formally known as the UN Decade of Healthy Ageing (2021-2030). With the adoption of the UN Decade of Healthy Ageing resolution, countries are committed to implementing collaborative actions to improve the lives of older people, their families and the communities in which they reside. The Decade addresses four interconnected areas of action. Adopting the UN's resolution on the Decade of Healthy Ageing has caused excitement, but a question that has weighed on everyone's mind is how governments will be held accountable? Besides, there have been no goals or targets set for the UN Decade of Healthy Ageing from a programmatic perspective for the action areas, and guidance on measures, data collection, analysis and reporting are urgently needed to support global, regional and national monitoring of the national strategies, programmes and policies. To this end, WHO in collaboration with UN agencies and international agencies established a Technical Advisory Group for Measurement of Healthy Ageing (TAG4MHA) to provide advice on the measurement, monitoring and evaluation of the UN Decade of Healthy Ageing at the global, regional and national levels.

Impact of COVID-19 lockdown on physical exercise among participants receiving the Promoting Activity, Independence and Stability in Early Dementia (PrAISED) intervention: a repeated measure study.

BACKGROUND: The potential decrease in daily physical activity associated with the COVID-19 pandemic lockdowns may have a negative impact on people living with dementia. Given the limited literature around the effects of home confinement in people living with dementia, this study investigated changes in physical exercise levels of participants in the intervention arm of the Promoting Activity, Independence and Stability in Early Dementia (PrAISED) Randomised Controlled Trial during the first COVID-19 national lockdown. It hypothesised that participants would maintain physical exercise levels. METHODS: A repeated measure (three time points) study involving 30 participants (mean age = 78.0 years, 15 male and 15 female, 22 (73.0%) living with their primary caregiver), from four regions in England receiving the PrAISED intervention. PrAISED is an individually tailored intervention of physical exercises and functional activities. Trained therapists deliver therapy sessions over a period of 52 weeks. Study participants received therapy sessions via phone or video calling during the COVID-19 lockdown. This study investigated self-reported minutes of physical exercise recorded on study calendars for the months of February (i.e., baseline - pre-lockdown), May (i.e., T1 - during lockdown), and August (i.e., T2-post-lockdown) 2020. RESULTS: Participants reported a statistically significant increase in activity levels between February and May (Wilcoxon Z = -2.013, p = 0.044) and a statistically significant decrease between May and August (Wilcoxon Z = -2.726, p = 0.004). No significant difference was found in the physical activity levels from pre- to post-lockdown (Wilcoxon Z = 0.485, p = 0.620). CONCLUSION: Despite concerns that the restrictions associated with the COVID-19 pandemic might lead to reductions in physical exercise, participants in receipt of the PrAISED intervention increased their amount of physical exercise during lockdown. Our findings support the potential of remote support for people living with dementia to help them maintain physical exercise levels in circumstances where face-to-face service provision is not possible. TRIAL REGISTRATION: The PrAISED trial and process evaluation have received ethical approval number 18/YH/0059 from the Bradford/Leeds Ethics Committee. The Clinical Trial Identifier for PrAISED is: ISRCTN15320670 ( https://doi.org/10.1186/ISRCTN15320670 ). Registration was made on 04/09/2018.

Are dementia services and support organisations meeting the needs of Lesbian, Gay, Bisexual and Transgender (LGBT) caregivers of LGBT people living with dementia? A scoping review of the literature.

OBJECTIVES: More than 60% of people with dementia live at home, where assistance is usually provided by informal caregivers. Research on the experiences of the Lesbian, Gay, Bisexual and Transgender (LGBT) caregivers is limited. This scoping review of the literature synthesizes international evidence on support provision for the population of LGBT caregivers. METHODS: Eight electronic databases and Google Scholar were searched using terms including 'Dementia', 'LGBT' and 'Caregiver' for all types of articles, including empirical studies, grey literature and sources from charity/third sector/lobbying organisations. Article selection was performed by two raters. Data were analysed through deductive thematic analysis, and three themes were established a priori: Distinct experiences of LGBT caregivers; current barriers to support; strategies to overcome the current challenges. RESULTS: Twenty articles were included. Distinct experiences of LGBT caregivers included a loss of LGBT identity, the impact of historical events, families of choice, and disclosing LGBT identities. Current barriers to support included poor representation of LGBT caregivers in support services, negative attitudes of staff and reluctance of caregivers to seek support. Strategies to overcome the current challenges included staff awareness training and kite-marking inclusion. CONCLUSION: Limited cultural competency of staff and a subsequent reluctance to seek help have an impact on use of support services among LGBT caregivers. Implications for practice include the development of cost-effective, feasible, and acceptable inclusiveness training for services. Implications for policy include implementation in organisations of top-down agendas supporting staff to understand sexuality and non-heteronormative relationships in older age.

Apathy Measures in Older Adults and People with Dementia: A Systematic Review of Measurement Properties Using the COSMIN Methodology.

BACKGROUND: Apathy is highly prevalent in dementia and is also seen in mild cognitive impairment and the general population. Apathy contributes to failure to undertake daily activities and can lead to health problems or crises. It is therefore important to assess apathy. However, there is currently no gold standard measure of apathy. A comprehensive systematic review of the measurement properties of apathy scales is required. METHODS: A systematic review was registered with PROSPERO (ID: CRD42018094390). MEDLINE, Embase, PsycINFO, and CINAHL were searched for studies that aimed to develop or assess the validity or reliability of an apathy scale in participants over 65 years, living in the community. A systematic review was conducted in line with the COnsensus-based Standards for the selection of health Measurement INstruments procedure for reviewing patient-reported outcome measures. The studies' risk of bias was assessed, and all relevant measurement properties were assessed for quality. Results were pooled and rated using a modified Grading of Recommendations Assessment, Development, and Evaluation procedure. RESULTS: Fifty-seven publications regarding 18 measures and 39 variations met the eligibility criteria. The methodological quality of individual studies ranged from inadequate to very good and measurement properties ranged from insufficient to sufficient. Similarly, the overall evidence for measurement properties ranged from very low to high quality. The Apathy Evaluation Scale (AES) and Lille Apathy Rating Scale (LARS) had sufficient content validity, reliability, construct validity, and where applicable, structural validity and internal consistency. CONCLUSION: Numerous scales are available to assess apathy, with varying psychometric properties. The AES and LARS are recommended for measuring apathy in older adults and people living with dementia. The apathy dimension of the commonly used Neuropsychiatric Inventory should be limited to screening for apathy.

The geriatrician's role in end-of-life care.

Healthcare aims to help older people to live well, but ultimately must also support them to die well. Most people die in old age, but predicting death in both short- and long-term is impossible for many, although not all, older people. Frail older people live with hope and pride in coping, and often anticipate recovery when ill. Key objectives of healthcare for older people are to maintain independence, minimise suffering and preserve dignity, which requires active medical, mental health and rehabilitation management, even when extending life is not the main goal. Thorough medical diagnosis and appropriate treatment and rehabilitation minimise disability, physical and mental distress and problems resulting from acute illness and crises. In these terms, 'health gain' can be achieved from medical intervention, even when life expectancy is short. Assumptions derived from cancer care about lack of reversibility with medical interventions are sometimes unwarranted. This has to be balanced against investigation- and treatment-burden, including that associated with hospital admission and the adverse effects of drugs and therapy interventions, and the need to respect the identity and autonomy of individuals. The resolution of these tensions requires anticipation of care options, multi-professional assessment, judicious and targeted treatment, good communication with patients and stakeholders and rigorous shared decision-making. In this commentary, we compare geriatric and palliative medicine, and describe how the geriatric medical approach can deliver appropriate healthcare towards the end of life. This is well supported by the broad knowledge, skill-set, flexibility and professional values displayed by geriatricians working in multi-professional teams.

Deconditioning in people living with dementia during the COVID-19 pandemic: qualitative study from the Promoting Activity, Independence and Stability in Early Dementia (PrAISED) process evaluation.

BACKGROUND: Restrictions introduced in response to the COVID-19 pandemic led to increased risk of deconditioning in the general population. No empirical evidence of this effect however has been gathered in people living with dementia. This study aims to identify the causes and effects of COVID-19-related deconditioning in people living with dementia. METHODS: This is a longitudinal phenomenological qualitative study. Participants living with dementia, their caregivers and therapists involved in the Promoting Activity, Independence and Stability in Early Dementia (PrAISED) process evaluation during the COVID-19 pandemic were qualitatively interviewed at two time points: the baseline 2 months after the national lockdown was imposed in England (i.e., May 2020), the follow up 2 months after the first set (i.e. July 2020). The data were analysed through deductive thematic analysis. RESULTS: Twenty-four participants living with dementia, 19 caregivers and 15 therapists took part in the study. Two themes were identified: Causes of deconditioning in people living with dementia during the COVID-19 pandemic and effects of deconditioning in people living with dementia during the COVID-19 pandemic. A self-reinforcing pattern was common, whereby lockdown made the person apathetic, demotivated, socially disengaged, and frailer. This reduced activity levels, which in turn reinforced the effects of deconditioning over time. Without external supporters, most participants lacked the motivation / cognitive abilities to keep active. Provided the proper infrastructure and support, some participants could use tele-rehabilitation to combat deconditioning. CONCLUSION: The added risks and effects of deconditioning on people with dementia require considerable efforts from policy makers and clinicians to ensure that they initiate and maintain physical activity in prolonged periods of social distancing. Delivering rehabilitation in the same way as before the pandemic might not be feasible or sustainable and innovative approaches must be found. Digital support for this population has shown promising results but remains a challenge. TRIAL REGISTRATION: The PrAISED trial and process evaluation have received ethical approval number 18/YH/0059 from the Bradford/Leeds Ethics Committee. The ISRCTN Registration Number for PrAISED is  15320670 .

Measuring Physical Activity Levels in People With Mild Cognitive Impairment or Mild Dementia.

Measuring physical activity (PA) in people with mild cognitive impairment or dementia can be difficult. The aim was to investigate the validity and acceptability of three different PA measurement methods. The mixed-method analysis included 49 participants with mild cognitive impairment or dementia, who completed a daily calendar recording PA, the International Physical Activity Questionnaire, and the Longitudinal Aging Study Amsterdam PA Questionnaire, and those who wore a Misfit Shine accelerometer. The quantitative analysis showed equal completion rates for the International Physical Activity Questionnaire and the accelerometer but a lower completion rate for the calendar. Correlations between outcome measures were moderate or strong. The qualitative analysis indicated that all measures were acceptable, though some participants required help to complete the calendars or fasten the accelerometers. The study supported the validity of these methods for people with mild cognitive impairment and mild dementia. Using accelerometers and completing calendars might increase the motivation to be active for some people.

Adding to the knowledge on Patient and Public Involvement: Reflections from an experience of co-research with carers of people with dementia.

BACKGROUND: Patient and Public Involvement (PPI) in research ensures that publicly funded research reflects the priorities of the people who will be affected by its results. Co-research, a branch of PPI, is equal partnership between academic researchers and members of the public, who steer and conduct research together. OBJECTIVES: To propose a model for good practice in co-researching with carers of people with dementia, by reporting and synthesizing the personal reflections of the academic and lay researchers around the methodological issues, benefits, and challenges of co-research. DESIGN: An academic researcher and two lay researchers with lived experience of caring with someone with dementia collaborated in all stages of a qualitative research study, including development of the research protocol and topic guide, data collection, analysis and synthesis, and dissemination of findings. Throughout the study, the academic and lay researchers annotated reflections of their experience in personal diaries. Data from the diaries were synthesized and mapped out in a model for good practice in co-research. RESULTS: Co-research yielded benefits for all those involved and on research outputs. There were practicalities and challenges that required extra resources, in order to make the involvement of lay researchers meaningful and effective. DISCUSSION: The model for good practice illustrates overarching and stage-specific guidelines, which can inform researchers and members of the public wishing to undertake good practice in co-research.

Physical activity engagement strategies in people with mild cognitive impairment or dementia - a focus group study.

Objective: This focus group study aimed to explore how to motivate people with mild cognitive impairment (MCI) or dementia and their carers to engage in exercise and physical activity.Methods: Four focus groups were conducted with six people with MCI or dementia, three carers and four clinicians (nurse, occupational therapist, physiotherapists). A thematic analysis of the data was undertaken.Results: Five main themes were identified: 'memory problems', 'self-motivation', 'external motivation', 'design of activities' and 'barriers'. Participants viewed exercise positively but emphasised that it needed to fit into their daily routine. Goal-setting was seen as helpful by some participants but others saw this as a source of potential failure. Enjoyment was seen as key to engagement.Conclusion: Exercise and physical activity interventions need an individualised approach to engage people with MCI or dementia, with a positive emphasis on enjoyment. Goal-setting should be used with caution in this group of people.

Promoting activity, Independence and stability in early dementia (PrAISED): a, multisite, randomised controlled, feasibility trial.

BACKGROUND: We tested the feasibility of delivering and evaluating a complex therapy intervention which aimed to promote activity and independence for people with early dementia (PrAISED). Feasibility questions were on: recruitment, randomisation, intervention delivery, adherence and withdrawals, level of supervision required, adverse events, data collection and sample size assumptions. METHODS: We conducted a three-arm, multi-site, single-blind, randomised controlled feasibility trial. Eligibility criteria were aged 65 years or older, diagnosed mild dementia or mild cognitive impairment, able to walk without human help, and communicate in English, no co-morbidities that prevented participation in cognitive assessment and capacity to give consent. Participants were recruited from Memory Assessment Service clinics and the 'Join Dementia Research' register. Patient participants were randomised 1:1:1 to a high intensity supervision PrAISED intervention, moderate intensity supervision PrAISED intervention or brief falls prevention assessment and advice (control). The PrAISED intervention aimed for participants to complete three hours of PrAISED exercises a week for 12 months. It included individualised activity and exercise plans and supervised exercises with regular re-assessment and progression, and was delivered by occupational therapists, physiotherapists and rehabilitation support workers. Primary efficacy outcome was the Disability Assessment for Dementia (DAD), measured after 12 months. Secondary outcomes included physical activity, quality of life, mood, cognition, strength, balance, rate of falls, frailty and carer strain. Falls and activity were ascertained by monthly diary. RESULTS: Between September 2016 and March 2017 we recruited 60 patient participants and 54 carer participants from two sites. Forty-nine patient participants completed a follow-up interview. Feasibility outcomes were mostly satisfactory, including recruitment and retention, intervention delivery and data completeness for most scales used. We could not maintain blinding of researchers at follow-up and experienced difficulties collecting data using some questionnaires and devices. Participants only completed a mean 77 (moderate supervision) and 71 (high supervision) minutes per week of PrAISED exercises over 12 months. We recorded 19 adverse events, none serious and related to the intervention. CONCLUSION: We conclude that with some adjustments to the trial protocol, it is feasible to deliver the PrAISED intervention and conduct a trial. TRIAL REGISTRATION: ClinicalTrials.gov: NCT02874300 (first posted 22nd August 2016), ISRCTN: 10550694 (date assigned 31st August 2016).

Where next for delirium research?

Clinicians who manage delirium must do so without key information required for evidence-based practice, not least lack of any clearly effective treatment for established delirium. Both the nature of delirium and the methods used to research it contribute to difficulties. Delirium is heterogeneous, with respect to motor subtype, aetiology, setting and the co-existence of dementia, and may be almost inevitable towards the end of life. Elements of assessment are subjective, so diagnosis can be uncertain or unreliable. Defining objectives of care and outcomes is sometimes unclear. Better identification and case definition, including seeking biomarkers, stratification by type, or aetiology, and application of more complex models of causation may help. This will likely require further observational epidemiology, imaging and laboratory-based research before further rounds of large-scale randomised controlled trials. Application of trial methodologies designed for drug treatments of better-defined conditions may have failed to take account of the complexities both of diagnosis and complex intervention in delirium. Both drug and complex intervention trials need sufficient preliminary work to ensure that the right dose, duration or intensity of treatment is delivered and a range of 'intermediate' and 'distal' outcome measures assessed. Re-purposing of established drugs may provide a source of investigational products. Greater use of alternative research methodologies (qualitative and realist), or adjuvants to trials (process evaluation), will help answer questions about focus, generalisability and why interventions succeed or fail. Delirium research will have to embrace both a 'back to basics' approach with increased breadth of methodologies to make progress.