Rationale and Design of the TARGET-EFT Trial: Multicomponent Intervention for Frail and Pre-frail Patients Hospitalized with Acute Cardiac Conditions.

BACKGROUND: With the aging population and rising rates of cardiovascular disease (CVD), cardiologists and cardiac surgeons are encountering a growing number of frail older patients that have complex cardiac and non-cardiac issues. Measuring frailty provides valuable prognostic information to help personalize treatment decisions. However, there is minimal evidence on multicomponent frailty interventions in this setting. The TARGET-EFT (The MulTicomponent Acute Intervention in FRail GEriatric PaTients with cardiovascular disease using the Essential Frailty Toolset) trial aims to target physical and non-physical frailty deficits to improve health-related quality of life and hospital-acquired disability in frail patients hospitalized with CVD.
METHODS: The TARGET-EFT trial is a single-center parallel-group randomized clinical trial in frail and pre-frail older adults ≥65 years admitted to the cardiovascular unit (CVU) at the Jewish General Hospital, Montreal, Quebec. The trial will compare usual inpatient care to a multicomponent intervention targeting physical weakness, cognitive impairment, malnutrition, and anemia. Outcomes of interest in both groups will be assessed at three time points: (1) study enrollment, (2) discharge from the CVU, and (3) 30 days after hospital discharge.
CONCLUSIONS: The overarching goal is to treat patients' frailty in parallel with their CVD, and in doing so, optimize patient functional losses while in-hospital and shortly thereafter. The results of this trial will inform best practices for patient-centered care in this vulnerable patient group.

Introduction

Frailty is a multidimensional geriatric syndrome, characterized by an increased vulnerability to stressors, observed in 20–60% of patients with cardiovascular disease (CVD) (1). Frailty is a major risk factor for adverse events in cardiac patients, including protracted recovery, functional decline, poor health-related quality of life (HRQOL) and death (1). With today’s aging population and rising rates of CVD, cardiologists and cardiac surgeons are encountering a growing number of frail older patients that have complex cardiac and non-cardiac issues. Measuring frailty in clinical practice provides valuable prognostic information to help personalize treatment decisions (2). The Essential Frailty Toolset (EFT) is one of several tools that has been validated to predict death and functional decline in older patients undergoing cardiac surgery and transcatheter aortic valve replacement (3, 4). In addition to being among the most predictive tools and easiest-to-administer, the EFT was conceived to be actionable via practical interventions aimed at correcting the elicited deficits (5).

During the course of a hospital admission for CVD, frailty can be exacerbated by both illness-related and hospitalization-related stressors such as sleep deprivation, undernutrition, pain, anxiety, polypharmacy, and immobility (6). These stressors exceed the frail patient’s homeostatic reserves and thus lead to decompensation in the form of delirium, functional decline, complications, and readmissions; which has been termed “post-hospital syndrome” (6, 7). The ensuing physical deconditioning can also precipitate disabilities in activities of daily living (ADLs), known as hospital-acquired disability (HAD) (8, 9). It has been reported that 50% of hospitalized patients over the age of 85 years acquire at least one new disability in ADLs upon discharge (8), placing them at risk for loss of functional independence and institutionalization. Among patients who developed HAD, 41% died within the first year post-hospitalization and 29% retained an acquired disability beyond one year (10).

Therapeutic de-frailing interventions (such as inpatient mobilization, nutritional supplementation, cognitive stimulation and anemia correction) can mitigate the effect of hospitalization-related stressors. Consequently, these interventions can help prevent iatrogenic complications and deconditioning. Ultimately, these contribute to avoiding HAD and improving patients’ HRQOL. There is minimal evidence on targeted multicomponent interventions addressing frailty in geriatric patients within acute cardiac care settings (11). The MulTicomponent Acute Intervention in FRail GEriatric PaTients with cardiovascular disease using the Essential Frailty Toolset (TARGET-EFT) randomized clinical trial aims to address this knowledge gap in patients with CVD. Through a patient-centered approach that focuses on physical activity, nutrition, and delirium prevention, this trial aims to improve HRQOL and prevent HAD in frail older patients hospitalized with CVD.

The primary objectives of the trial are:

To determine whether a multicomponent geriatric intervention to improve frailty, as measured with the EFT, will improve short-term HRQOL at 30 days post-discharge.

To determine whether this multicomponent geriatric intervention will reduce HAD at 30 days post-discharge.

The secondary objectives of the trial are to determine whether the intervention will reduce 30-day readmission or death, improve physical performance and frailty status, and reduce in-hospital anxiety and depression.

Methods

Study Design

The TARGET-EFT trial is a single-center parallel-group randomized clinical trial that will compare usual inpatient care to a multicomponent geriatric intervention in frail and pre-frail older adults admitted to the cardiovascular unit (CVU) at the Jewish General Hospital, McGill University, Montreal, Quebec. The CVU is an integrated practice unit with cardiology and cardiac surgery patients, staffed by a multidisciplinary team including: cardiologists, cardiac surgeons, nurse practitioners, nurses, residents, medical students, occupational therapists, nutritionists, and physiotherapists. The unit has 45 beds and admits 2,200 patients per annum.

The target population encompasses acute cardiac conditions such as acute coronary syndromes, acute decompensated heart failure, arrythmias, recent cardiac surgery, symptomatic valvular heart disease, myopericarditis and pulmonary hypertension. The trial will recruit 144 patients (72 per group). Patients who meet the inclusion criteria and consent to participate will be randomly allocated to the control group consisting of usual clinical care, or the intervention group consisting of treatments targeted to the EFT deficits identified. Outcomes of interest in both groups will be assessed at three time points: (1) study enrollment, (2) discharge from the CVU, and (3) 30 days after hospital discharge. The study flowchart is illustrated in Figure 2. The conceptual diagram is illustrated in Figure 3, showing how the TARGET-EFT interventions aim to counteract frailty deficits and hospitalization-related stressors.

Figure 2

Study Design Flow Chart

Patients admitted to the cardiovascular unit will be screened for eligibility based on their EFT score, age, and anticipated discharge date. Those who consent will undergo baseline assessments and be randomized to the intervention or usual care group, which they will receive throughout their hospital stay. Abbreviations: EFT, Essential Frailty Toolset; HADS, Hospital Anxiety and Depression Scale; OARS, Older Americans Resources and Services; SPPB, Short Physical Performance Battery.

Figure 3

Conceptual Diagram

Frail older patients are at risk of hospital-acquired disability and poor quality-of-life after a hospitalization. The interaction of hospitalization-related stressors and pre-existing frailty deficits negatively impacts the capacity for recovery after an acute illness. The TARGET-EFT interventions aim to counteract hospitalization-related stressors and frailty deficits to improve patient-centered outcomes. Abbreviations: BMI, body mass index; HAD, hospital-acquired disability; HRQOL, health-related quality of life; IDA, iron deficiency anemia; IV, intravenous.

The trial is approved by the Research Ethics Board of the Jewish General Hospital and registered on the National Institutes of Health’s clinical trials database ClinicalTrials. gov (NCT04291690). Graduate students funded by research scholarships (see Funding section) will coordinate all aspects of the trial in collaboration with the treating cardiology teams.

Participant Selection

Inclusion criteria

Age ≥ 65 years

Frail or pre-frail, defined by an EFT score ≥1

Admitted to the CVU

Provided written informed consent

Exclusion criteria

Expected discharge within <3 days

Clinically unstable, defined as any of:

Unstable vital signs

Low-threshold coronary ischemia

Uncontrolled decompensated heart failure

Uncontrolled arrhythmia

Awaiting cardiac surgery within <3 days

Severe cognitive impairment, defined by a score of ≤10/30 on the Mini-Mental Status Examination (MMSE)

Active delirium, defined by the Confusion Assessment Method (CAM)

Psychiatric conditions precluding cooperation

Parkinson’s disease

Recent stroke within <7 days

Marked physical limitations or bed-bound precluding participation in exercise interventions

End-of-life care plan

COVID-19 positive or not yet ruled out

Not English or French speaking

Screening Process

Research personnel will liaise on weekdays and most weekends with the nursing staff and allied health professionals in the CVU to pre-screen patients admitted that day or within the last three days. Patients’ care needs, level of mobility, clinical status, and discharge plan will be discussed with the treating team. Research personnel will then screen potentially eligible patients using the EFT, consisting of four components: physical weakness (measured by the time to complete five chair rises), cognitive impairment (measured by a three-word recall and orientation to time and place), malnutrition (measured by serum albumin), and anemia (measured by serum hemoglobin). An EFT score of ≥ 1–2 is indicative of pre-frailty and a score of 3–5 is indicative of frailty (Figure 1). Patients who meet these criteria and provide written informed consent to participate will be randomly allocated to one of two parallel groups and undergo an in-depth frailty assessment.

Figure 1

Essential Frailty Toolset (EFT)

The EFT is scored 0 to 5 based on the following four assessments at the patient’s bedside: five chair rises (without using arms), three-word recall and orientation to time and place, and verification of their recent hemoglobin and serum albumin values. EFT scores of 1–2 are considered pre-frail, while scores of 3–5 are considered frail.

Frailty and Baseline Assessments

The frailty and the baseline assessments consist of an interviewer-administered questionnaire, anthropomorphic measurements, and physical performance tests conducted by research personnel. In addition to the EFT, the following measures will be captured: Short Performance Physical Battery (SPPB), Preoperative Nutrition Score (PONS), MMSE and hemoglobin (12–14). The SPPB is composite score from 0–12 consisting of time to complete five chair rises, time to walk five meters, and ability to stand for 10 seconds in side-by-side, semi-tandem, and tandem positions. The PONS is a composite score from 0–4 consisting of low body mass index, weight loss, low appetite, and low albumin level. The following covariates will be recorded: age, sex, height, weight, reason for hospital admission, comorbidities, cardiac investigations, and treatments received.

Randomization and Blinding

Patients will be randomly allocated to either the intervention or control group on a 1:1 basis in concealed blocks of eight (block randomization) stratified by sex to ensure an equal distribution of males and females. Research personnel administering the intervention cannot feasibly be blinded to the allocation group, however, outcome ascertainers will be blinded; specifically, the primary outcome at discharge will be ascertained by a blinded clinical nurse, and the 30-day telephone questionnaires will be administered by a blinded member of the research team unaware of the allocation group so as to minimize bias (such as leading intervention patients towards more favorable responses on questionnaire-based outcome measures).

Allocation Groups

Control group

Patients randomized to the control group will receive usual clinical care as prescribed by their treating physicians. In addition to cardiovascular treatments, usual care may or may not include inpatient physiotherapy, nutritional consultation and supplementation, geriatric and psychiatric consultation, and treatment of anemia. Available resources do not allow for the involvement of physiotherapists, nutritionists, and geriatricians in all older patients, typically being reserved for those with apparent deficiencies seen by the treating physicians or nurses.

Intervention group

Patients randomized to the intervention group will receive an in-hospital multicomponent geriatric intervention to improve frailty deficits (“de-frailing”). The intervention will provide support for mobilization, orientation, and nutrition, as well as additional support targeted to patients’ frailty deficits such as strength and balance exercise training for those with physical weakness, cognitive stimulation for those with cognitive impairment, oral nutritional supplementation for those with malnutrition risk, and intravenous iron replacement therapy for those with iron-deficiency anemia (Table 1).

Table 1

Usual Care and TARGET-EFT Intervention

	Physical Weakness	Cognitive Impairment	Malnutrition	Anemia (Iron-Deficient)
Usual care	• RN encouragement to mobilize early and often • Physiotherapy PRN	• RN orientation • RN screening for delirium • Geriatrics consult PRN	• RN encouragement to eat hospital meals • Nutritionist screening and intervention PRN • MedPass PRN	• MD investigation for diagnosis of anemia • MD prescription for oral or intravenous iron replacement PRN
Intervention	• Additional encouragement to mobilize between and during visits BID • Chair rises at least BID • If SPPB ≤9: Vivifrail program x BID	• Put on hearing/vision aids • Additional orientation on board and during visits BID • Address sleep promotion • If MMSE ≤26/30: cognitive stimulation BID	• Additional encouragement to eat during visits BID • Address food likes/barriers • If PONS +: prescription of MedPass QID	• Put on dentures • Verification of iron studies according to established diagnostic criteria • If iron deficient anemia: prescription of intravenous iron QD x 3

Patients allocated to the intervention group will receive usual clinical care plus the multicomponent trial intervention, whereas those allocated to the control group will receive usual clinical care only. Abbreviations: BID, twice a day; MD, medical doctor; MMSE, Mini-Mental Examination; PONS, Preoperative Nutrition Score; PRN, as per clinical indication; RN, registered nurse; SPPB, Short Physical Performance Battery; QD, once a day; QID, four times a day.

Research personnel who will deliver the intervention are graduate students with accreditation in Kinesiology and experience providing exercise therapy to older adults. They will visit each patient twice-daily (once in the early morning and once in the afternoon) in their hospital room to provide the different components of the intervention. In cases of prolonged hospital stays, the frequency of visits will be reduced to once daily during the 3rd and 4th weeks of hospitalization, and once every other day thereafter. Visits may be deferred or rescheduled if patients are not feeling well, refuse, or are absent for scheduled tests during the planned visit time.

At the time of discharge, intervention patients will be encouraged to continue guideline-recommended physical and nutritional habits as instituted during their hospital stay (such as 150 minutes per week of physical activity, as feasible, and a balanced diet), with the support of their family members and caregivers and the oversight of their treating physician. Research personnel will not provide any interventional support or supervision after discharge.

Exercise component

All intervention patients will be encouraged and assisted to walk around the ward, as tolerated and approved by their treating team, to maximize the time spent out of bed (at a minimum, up in chair for all meals). They will also be encouraged and assisted to perform the chair rise exercise to build lower extremity strength. The subset of intervention patients with greater physical weakness, defined as an SPPB score ≤9, will be provided with a supervised exercise program combining strength, flexibility, balance, and mobility, with the repetitions and difficulty level tailored to their SPPB scores and physical capabilities. The exercise program is adapted from Vivifrail, a European Union-funded initiative to prevent frailty, physical deconditioning, and incident disability in older persons (Supplementary Table S1) (15). The exercise program is comprised of two daily sessions of 20 minutes each; the morning session will targeting lower-body strength with and flexibility, and the afternoon session will target balance and walking.

Cognitive component

All intervention patients will be encouraged and assisted to wear hearing and visual aids (if applicable) and oriented to time and location, both verbally and in writing on a clearly visible whiteboard in their hospital room. Family members and caregivers will be encouraged to orient the patient as well. Researchers will inquire about sleep problems, which will be communicated to the treating team. The subset of intervention patients with greater cognitive impairments, defined as an MMSE score ≤26, will be provided with cognitive stimulation comprising activities with the patient, including, but not limited to, current news, trivia, crossword puzzles, and memory games for a target of 20 minutes twice a day. The cognitive intervention is adapted from the Hospital Elder Life Program (HELP) to prevent delirium (16).

Nutritional component

All intervention patients will be encouraged and assisted to wear their dentures (if applicable) and eat their hospital meals and snacks. Researchers will inquire about food preferences and eating barriers, which will be communicated to the dietician. The subset of intervention patients with greater nutritional deficits, defined as a positive PONS score, will be prescribed MedPass supplementation with Nestle Resource 2.0 or Ensure ProteinMax. MedPass consists of a 60 mL, calorically dense, oral nutritional supplement prescribed by clinicians and delivered by nurses at the same time as medications (not at mealtime) four times per day. It has been shown to be effective in patients at risk of malnutrition and better tolerated in older adults as compared to protein supplements that are more voluminous and compete with mealtime food intake (17, 18). If MedPass supplementation is contraindicated, the treating team will have full discretion to avoid its prescription and consider alternative supplementation strategies.

Anemia component

The subset of intervention patients with iron-deficiency anemia, defined as (i) hemoglobin <130 g/L in men or <120 g/L in women will be assessed for low ferritin. Patients with (ii) ferritin <100 µg/L or ferritin <300 µg/L with a saturation <20%, will be prescribed intravenous iron replacement therapy by the treating physician. Specifically, three daily doses of iron sucrose 300 mg, as per the indication for intravenous iron replacement therapy based on the Canadian Cardiovascular Society Guidelines for Heart Failure (19). Intravenous mode of delivery is preferred because of its rapid effect as compared to oral supplementation, with hospitalization being an opportune moment to administer it (20). If intravenous iron therapy is contraindicated, the treating team will have full discretion to avoid its prescription and consider alternative strategies.

Outcome Measures

The primary outcome is HRQOL as measured by the EQ-5D-5L scale at 30 days post-discharge. The EQ-5D-5L scale quantifies HRQOL in five dimensions of health: 1) mobility, 2) self-care, 3) usual activities, 4) pain/discomfort, and 5) anxiety/depression. Each dimension has five response options ranging from no problems to severe problems, which are entered in a regression formula to compute a composite score ranging from 0 to 1 based on nationally adapted coefficients (21, 22). The EQ-5D-5L scale is self-reported and administered by an observer. For the TARGET-EFT trial, the observer will be the patient’s treating nurse for the discharge assessment and a trained research assistant for the 30-day telephone assessment, both of which will be blinded to the patient’s allocation group.

The main secondary outcome is hospital-acquired disability as measured by the Older Americans Resources and Services (OARS) scale at 30 days post-discharge (23). The OARS scale quantifies dependencies in seven basic and seven instrumental activities of daily living (ADLs, IADLs). Each activity has four response options to evaluate the capacity of the patient to complete them independently: without help, with some help, unable, and not applicable. The OARS scale is self-reported and administered by a trained research assistant blinded to the patient’s allocation group at the 30-day telephone assessment.

Other secondary outcomes are physical frailty as measured by the Short Physical Performance Battery (SPPB) scale at discharge and the SARC-F questionnaire at 30 days post-discharge (24). Additional secondary outcomes are mood disturbance as measured by the Hospital Anxiety and Depression Scale (HADS) at discharge and length of stay from the day of randomization to hospital discharge (25). Table 2 lists the outcome measures.

Table 2

Clinical Outcomes of Interest and Ascertainment Time Points

	Measured by	Baseline	Discharge	30 Days
Primary Outcome
Health-related quality of life	EQ-5D-5L	X	X	X
Secondary Outcomes
Hospital-acquired disability	OARS	X	X	X
Length of stay	Days		X
Lower extremity physical performance	SPPB	X	X
Functional impact of sarcopenia	SARC-F	X		X
All-cause death, discharge to healthcare facility, unplanned repeat hospital visit	Composite benefit			X

Abbreviations: OARS; Older Americans Resources and Services. Other abbreviations as in Table 1.

Statistical Analysis

Data will be analyzed according to the intention-to-treat principle, modified to exclude patients who were censored pre-emptively before receiving a first visit or completing core assessments (due to early discharge or death). Multivariable linear regression will be used for continuous outcome measures (EQ-5D-5L, OARS, SPPB, SARC-F, HADS, length of stay) to determine the effect of the intervention after adjusting for baseline scale values and duration of the in-hospital intervention. Effect-modification with these and other relevant covariates will be examined. Missing data will be imputed using multiple imputation. Multivariable logistic regression will similarly be used for dichotomous composite outcome measures.

Sample Size Calculation

The sample size calculation is based on the primary outcome measure of HRQOL as measured by the EQ-5D-5L scale. A sample size of 72 patients per group (N=144) is required to detect a clinically meaningful change of 0.056 ± 0.011 points in the EQ-5D-5L scale given an alpha of 0.05 and a beta of 0.2 (26). This sample size accounts for an anticipated upper limit of 10% losses to follow-up, a conservative estimation given that the primary outcome is assessed shortly after discharge.

Data Collection and Management

Data will be collected on paper-based case report forms and entered in a REDCap database. REDCap is a web-based application for managing clinical study data, which is hosted on secure server located at the Jewish General Hospital’s Lady Davis Institute for Medical Research. The patient’s identification will be anonymized and codified using a 3-digit number followed by a 2-letter monogram; no identifying information will be disseminated in publications and scientific presentations.

Ethics Approval

The Jewish General Hospital’s Research Ethics Board has approved this trial, which will be conducted in accordance with the Tri-Council Policy Statement on the Ethical Conduct for Research Involving Humans (2014) as well as the requirements set forth by the Research Ethics Board. Participation in the TARGET-EFT trial will be entirely voluntary, and patients will have the right to refuse or withdraw from the trial at any time. Regardless of a patient’s enrolment in the trial, they will be entitled to receive mobilization, physiotherapy, nutritional supplementation, and anemia treatments as clinically indicated by the treating physicians and allied health professionals.

Trial Monitoring

Exercise-related symptoms and adverse events will be recorded and reviewed throughout the trial to ensure patient safety. Chest pain, dyspnea, palpitations, desaturation, lightheadedness, syncope, falls, musculoskeletal pain or discomfort, worsening heart failure or coronary ischemia will be considered as significant adverse events, and will be promptly reported to the Research Ethics Board for further review.

To minimize the risk of adverse events, heart rate and oxygen saturation will be monitored during exercise. Exercise intensity will be limited as a function of the patients’ SPPB level, current health status, and perceived exertion using the 20-point Borg scale (27). The research team will consult with the clinical team on a daily basis to ensure that the patients are safe to undergo the planned exercise interventions, deferring exercise sessions or reducing exercise intensity when needed.

Discussion

The TARGET-EFT trial is testing a practical approach to identify and treat frailty in the acute cardiac setting. Identification of frailty follows a two-step process starting with the brief EFT scale, and in selected cases, additional assessments of strength, cognition, nutrition, and anemia. Both the EFT and additional assessments are easy to perform at the patient’s bedside, and the tiered approach helps to more efficiently allocate resources in busy hospital environments. Treatment of frailty is multifaceted and individualized to target the patient’s physical and non-physical deficits (5); aiming to mitigate the impact of hospitalization-related stressors and minimize the risk of deconditioning and post-hospitalization syndrome.

Using the EFT as the starting point has several advantages. First, feasibility, the EFT is simple, rapid to perform and does not require special equipment or lengthy questionnaires, which would likely be prohibitive in constrained clinical workflows. Second, interpretability, the four components of the EFT are each associated with specific domains (physical function, cognitive function, nutrition, anemia) that have actionable pathways for further assessment and management, unlike certain other frailty scales that output aggregated global estimates of risk that are difficult to distill. Third, prognostic value, previous studies have shown that high EFT scores signify a high-risk subpopulation of older adults that have greater risks of mortality and worsening disability and thus stand to benefit from interventions (11, 28).

Interventions to de-frail older adults have been previously reviewed (5, 29), and can be categorized into one or more of the following categories: exercise interventions, nutritional interventions, cognitive interventions (including delirium prevention programs), psychosocial interventions, and pharmacological interventions. Most of the clinical trials in this field of research have been conducted in community-dwelling older adults, with few trials addressing hospitalized patients, and even fewer trials addressing acute cardiac patients (30–34). It is this under-represented patient population that the TARGET-EFT trial is seeking to include and treat. In doing so, the TARGET-EFT trial will address an important knowledge gap about the potential benefits of treating patients’ frailty deficits in parallel with their cardiac deficits.

The components chosen for our intervention are supported by high-quality evidence that has shown success in treating frailty. Moreover, they are intended to be practical and amenable to real-world implementation within the confines of a hospital ward. A key requirement for implementation is to minimize extra workload for physicians, nurses, physiotherapists, and dieticians; to this end, the intervention is designed to be predominantly driven by exercise providers who will liaise with the treating team to provide and receive updates about the patients’ progress and seek expertise when needed. While not part of our protocol, future implementations may leverage trained volunteers to help mobilize, stimulate, and feed patients, akin to the highly-successful Hospital Elder Life Program (HELP) (16).

Evidence for the exercise component

A clinical trial by Martínez-Velilla et al. showed that basic resistance exercises administered to older patients on acute geriatrics wards improved functional status, independence in ADLs, and HRQOL at discharge (35). In addition, clinical studies showed that early mobilization initiatives on acute care wards and intensive care units improved functional status (36, 37) and that these benefits extended to frail patients (38). Of note, a systematic review found inconsistencies in the effect of exercise interventions on frailty parameters owing to low sample sizes and lack of standardization in exercise intensity and frequency between studies (39), and less is known about the capabilities of acute cardiac patients to perform such exercise interventions.

Evidence for the nutrition component

The NOURISH clinical trial showed that a protein-rich oral nutritional supplement beverage (the same as used in the TARGET-EFT trial) administered to malnourished hospitalized older adults reduced all-cause mortality at 90 days (40, 41). In a similar patient population, a clinical trial showed that oral nutritional supplementation based on the MedPass protocol (also used in the TARGET-EFT trial) improved HRQOL. A meta-analysis concluded that nutritional support reduced mortality and readmissions compared to standard care in frail and pre-frail hospitalized older adults (42). Our prior research substantiated the co-prevalence of malnutrition and frailty and impact on adverse events (43, 44).

Evidence for the cognitive component

Given that older adults with cognitive impairment are at substantially greater risk of delirium when hospitalized, and in turn, delirium is consistently tied to downstream mortality and major morbidity (45–47), this will be the focus of our cognitive component. A meta-analysis concluded that delirium prevention programs, diverse in their respective protocols, succeeded in reducing the incidence of delirium in older patients undergoing elective surgeries (48). Also in the postoperative setting, the HELP (similar to the cognitive component of the TARGET-EFT trial) reduced length of stay and improved physical and cognitive functioning in vulnerable older patients (49).

Evidence for the anemia component

There is a well-documented association between anemia and frailty, both highly prevalent in older adults with CVD, as shown in cross-sectional and longitudinal studies (50). Intravenous iron therapy may mitigate frailty as it is associated with improved HRQOL, energy level, and functional capacity (as measured by the 6-minute walk test) (51, 52). A meta-analysis of four clinical trials concluded that intravenous iron therapy reduced the composite endpoint of cardiovascular death or hospitalization in chronic heart failure, and the recently reported AFFIRM-AHF trial showed similar benefits in the context of acute hospitalized heart failure (53, 54). While deemed safe and more efficacious than oral iron for older adults, intravenous iron remains underutilized by clinicians (55).

Conclusions

To our knowledge, TARGET-EFT will be the first randomized clinical trial to test a multicomponent intervention — addressing physical and cognitive impairments as well as nutrition and anemia — to de-frail older adults hospitalized with CVD. The overarching goal is to treat patients’ frailty in parallel with their CVD, and in doing so, optimize their functional losses while in-hospital and in the short-term. The results of this trial will inform best practices for patient-centered care and frailty management in this vulnerable group of patients. Importantly, the proposed assessment and intervention paradigm is amenable to translation in clinical practice.

Supplementary Table S1: Exercise Intervention