277 The ‘Bermuda Triangle’ of Orthostatic Hypotension, Cognitive Impairment and Reduced Mobility: Associations with Falls and Fractures in Community-dwelling Older People

Background

Orthostatic Hypotension (OH), cognitive impairment and mobility impairment frequently co-occur in older adults who fall. The aim of this study was to examine the clustering of these three geriatric syndromes and ascertain their longitudinal associations with falls and fractures in a large cohort of community-dwelling older people (≥65 years).

Methods

This study utilized data from Waves 1-5 of TILDA. OH was defined as a drop of ≥20 mmHg in systolic blood pressure when measured after standing from a seated position and/or reporting unsteadiness when getting up from a chair. Cognitive impairment was defined as MMSE ≤24 and/or self-reporting memory as fair or poor. Mobility impairment was defined as 'Timed Up and Go' ≥12 seconds. Logistic regression models, including 3-way interactions, were used to assess the longitudinal associations of the three geriatric syndromes with future falls (explained and unexplained) and fractures.

Results

Of those with at least one geriatric syndrome (993/2108, 47%), over two-thirds (644/993) had any one of the three, one-quarter had any two (261/993) and almost 10% (88/993) had all three syndromes. One-fifth of the study sample had an unexplained fall during follow-up (mean 6.6 years), while one-tenth had a fracture. In fully adjusted models, the cluster of OH, cognitive impairment and mobility impairment was associated with a greater than 4-fold likelihood of unexplained fall (Odds Ratio 4.36 (2.61–7.28); p<0.001) and double the likelihood of incident fracture (Odds Ratio 2.51 (1.27–4.96); p=0.008) during follow-up, when compared to other clusters. There was no association with explained falls.

Conclusion

The ‘Bermuda Triangle’ of co-existing OH, cognitive impairment and mobility impairment, was independently associated with increased risk of future unexplained falls and fractures amongst community-dwelling older people. This simple risk identification scheme may represent an ideal target for multifaceted falls prevention strategies in community-dwelling older adults.

Frail by four different measures and new adverse events from lower blood pressure control in hypertensive older adults: a 2-year prospective study in The Irish Longitudinal Study on Ageing (TILDA)

Background

The 2018 European Society of Cardiology/European Society of Hypertension (ESC/ESH) guidelines for management of hypertension in adults aged ≥65 years recommend a blood pressure (BP) treatment target of 130–139/70–79 mmHg if tolerated [1]. Randomised controlled trials have advocated for lower BP, but this may lead to adverse outcomes in the frail. Yet, different operationalisations of frailty exist in the literature [2,3].

Purpose

We compared four frailty classifications in their ability to predict 2-year incident adverse outcomes (falls/fractures, syncope, transient ischaemic attack/stroke, heart attack, heart failure, hospitalisation, and mortality) associated with below-target BP control (<130/70 mmHg) in The Irish Longitudinal Study on Ageing (TILDA).

Methods

Data from participants aged ≥65 years treated for hypertension in Wave 1 (W1) was analysed. Frailty was identified by Frailty Phenotype (FP) [4], the Clinical Frailty Scale-classification tree (CFS) [5], a 32-item self-reported Frailty Index (FI) [6], and the 5-item FRAIL (Fatigue, Resistance, Ambulation, Illnesses & Loss of Weight) scale [7]. We formulated 16 participant groups at W1 based on frailty-BP combinations. Outcomes at wave 2 (W2) two years later were analysed with binary logistic regression models adjusted for age, sex, education, polypharmacy, classic orthostatic hypotension, Montreal Cognitive Assessment (MOCA) score and number of chronic diseases.

Results

Of 1920 W1 participants aged ≥65 years and treated for hypertension, 1229 had full BP/FP data, 1282 for BP/CFS, 1274 for BP/FI, and 1276 for BP/FRAIL. The non-frail groups in all 4 frailty classifications with BP treated below or above target did not have an increased risk of any of the adverse health outcomes at W2. For the frail treated below target, hospitalisation by W2 was significantly more likely in those who were frail by FP and FRAIL. The frail by FRAIL and BP treated below target were the only with increased risk of mortality by W2. The frail by FI and FRAIL with BP treated below target had increased risk of new heart failure and falls/fractures by W2.

Conclusions

Frailty was independently associated with adverse outcomes in hypertensive older adults treated below the ESC/ESH target. However, different frailty classifications had different prognostic implications. For those below BP target, frailty by FRAIL was associated with the highest number of risks (falls/fractures, heart failure, hospitalisation and mortality), followed by the frail by FI (falls/fractures, heart failure). Based on our results and frailty measures considered, we recommend that FRAIL and FI are regarded as the methods of choice to identify frailty when applying the ESC/ESH guideline. Models of frailty that do not explicitly measure comorbidities (such as FP and CFS) may be less useful to capture risk of adverse events from lower blood pressure control.

Funding Acknowledgement

Type of funding sources: Public Institution(s). Main funding source(s): Irish Department of HealthIrish LifeAtlantic PhilanthropiesRoman Romero-Ortuno is funded by a grant from Science Foundation Ireland

New definition of hypotension in patients with reflex syncope using 24-hour ambulatory blood pressure monitoring (SynABPM Study)

Background

Diagnostic criteria for ambulatory blood pressure monitoring (ABPM) in patients with suspected reflex syncope are lacking.

Purpose

We hypothesized that patients with reflex syncope have a higher prevalence of systolic blood pressure (SBP) drops on ABPM than control subjects and we aimed to define the SBP cut-off values that allow identification of patients with hypotensive susceptibility.

Methods

We compared ABPM data from reflex syncope patients and controls, matched by average 24-hour SBP, age, sex and hypertension. Patients with constitutional hypotension, orthostatic hypotension, predominant cardioinhibition or competing causes of syncope were excluded. Daytime and night-time SBP drops (<110, 100, 90, 80 mmHg) were assessed. Findings were validated in an independent sample.

Results

In the Derivation cohort, daytime SBP drops were significantly more common in 158 syncope patients than 329 controls. One or more daytime drop <90 mmHg provided the best diagnostic yield (91% specificity, 32% sensitivity, Odds Ratio [OR]=4.6, p=0.001). Two or more-daytime drops <100 mmHg achieved 84% specificity and 40% sensitivity (OR=3.5, p=0.001). Results were confirmed in the Validation cohort: one or more daytime SBP drop <90 mmHg provided 94% specificity and 29% sensitivity (OR=6.2, p<0.001), while two or more daytime SBP drops <100 mmHg achieved 83% specificity and 35% sensitivity (OR=2.6, p<0.001) (Figure 1).

Conclusion

SBP drops during ABPM are more common in reflex syncope patients than in controls. Cut-off values that may be applied in clinical practice are defined. This study expands the current indications for ABPM to patients with reflex syncope.

Funding Acknowledgement

Type of funding sources: None.

76 PREDICTIVE MODEL FOR MOBILITY DECLINE: INDIVIDUAL TRIAL MISTAKE THRESHOLDS IN SUSTAINED ATTENTION TO RESPONSE TASK (SART)

Background

The Sustained Attention to Response Task (SART) is a standard computer-based cognitive test designed to measure the sustained attention, fundamental for completing tasks that require supervision over time (Robertson et al., 1997). However, commonly used average features may result in loss of information and data misinterpretation, leading to inability to detect clinically expected associations (O’Halloran et al., 2014).

Methods

Here, we present a new method to visualise the full information obtained from the SART test, ordering by age, and categorising in groups based on mobility status in a large population-based study of ageing in Ireland. A new threshold, derived from the visualisation and based on the individual trial number of mistakes, was employed to individuate poorer SART performances, and to predict mobility and cognitive decline after 4 years in binary logistic regression models.

Results

Raw SART data were available for 4,864 participants aged 50 years and over at baseline. The new variable bad performances, expressing the number of SART trials with at least 4 mistakes, was the most significant predictor of mobility decline, defined as the transition from Timed Up-and-Go (TUG) < 12 to TUG ≥12 seconds (Odds Ratio (OR) = 1.29; 95% Confidence Interval (CI) 1.14–1.46; p < 0.001), and the only significant predictor of new falls (OR = 1.11; 95% CI 1.03–1.21; p = 0.011) compared to traditional SART variables in models adjusted for multiple covariates. No SART-related variables resulted significant predictors of cognitive decline, defined as a decrease of at least 2 points in the Mini-Mental State Examination (MMSE) score.

Conclusion

This multimodal visualisation and the new threshold approach could help clinicians to easily develop relevant hypotheses, and better identify subjects at higher risk of future mobility decline.

168 ANXIETY SYMPTOMS AMONG OLDER PEOPLE DURING THE COVID-19 PANDEMIC: PREVALENCE AND ASSOCIATED FACTORS

Background

There are concerns that the COVID-19 pandemic could lead to a rise in mental health problems including anxiety amongst older people, especially those shielding alone during the pandemic.

The aim of this study therefore is to examine the prevalence of anxiety symptoms during the COVID-19 pandemic amongst older people and clarify factors associated with higher burden of symptoms.

Methods

We analysed data from the COVID-19 study of The Irish Longitudinal Study on Ageing, conducted on over 3,100 community dwelling people aged ≥60 years from July–November 2020.

Anxiety symptoms were measured with the Generalised Anxiety Disorder-7 Questionnaire with a score ≥ 10 indicating moderate–severe anxiety.

Linear regression models were used to assess the association of variables of interest with anxiety symptoms.

Results

Almost 9% of participants (n = 3,128; mean age 71 years) had moderate–severe symptoms of anxiety.

Factors independently associated with a higher burden of anxiety symptoms included female sex (β = 0.60 (0.33–0.87)); living alone (β = 0.72 (0.41–1.02)); ≥2 chronic diseases (β = 0.85 (0.41–1.30); heart disease (β = 0.95 (0.45–1.46)) and reporting frequent loneliness (β = 6.59 (6.03–7.16)). Age ≥ 80 years (β = −0.77 (−1.16—0.37)) and tertiary level education (β = −0.48 (−0.86—-0.10)) were associated with lower anxiety symptom burden.

Conclusion

Almost 1 in 10 of this population-representative sample of older people had moderate to severe anxiety symptoms during the COVID-19 pandemic.

Strategies to address loneliness, which was particularly strongly associated with anxiety symptoms during the pandemic, should be a priority.

136 ASSOCIATIONS OF FRAILTY WITH CONSECUTIVE GAIT SPEED TRAILS MEASURED BOTH WITH AND WITHOUT ADDITIONAL STRESSORS

Background

Frailty is associated with gait speed and is defined as increased vulnerability to stressors. While usual gait speed is often measured, gait speed under additional stressors such as simultaneously reciting alternate letters of the alphabet (cognitive dual task) or walking at maximum pace are also measured. Consecutive trials may introduce an additional temporal stressor and we hypothesise that frailty may be associated with a greater reduction in walking speed across trials.

Methods

Data from community-dwelling adults aged 50+ years at Wave 3 of The Irish Longitudinal Study on Ageing were utilized. Using a 32-item frailty index (FI) we derived non-frail, pre-frail and frail groups. Gait speeds were measured using a 4.88 m walkway (GAITRite, CIR Systems, NY, USA). We examined differences in gait speed between two consecutive walks in three conditions (usual pace, cognitive dual task, and maximum pace) for the entire cohort, and by frailty group. Related-samples Wilcoxon signed rank tests were employed, with statistical significance set at P < 0.05.

Results

For the entire cohort, walk 2 speed for usual and cognitive conditions was higher by 1.0 cm/s (N = 4,097) and 1.1 cm/s (N = 3,927) respectively, and lower by 1.9 cm/s for maximum (N = 3,926). Stratified by FI, all groups walked more quickly in normal (1.0, 1.1, 1.2, respectively) and cognitive (1.3, 0.8, 0.5), and more slowly in maximum (−2.2, −1.6, −1.0).

Conclusion

In our analyses, higher frailty seemed to be associated with a higher increase for the usual walk, a smaller increase for the cognitive walk, and a smaller decrease in maximum speed. The clinical significance of the differences was very small. However, our results support that in research and clinical practice, frailty by FI should not be expected to lead to a different pattern of gait speed change across consecutive trials.

218 INCREASING PREVALENCE OF METABOLIC SYNDROME IN OLDER ADULTS IN IRELAND

Background

Metabolic syndrome (MetS) is a cluster of inter-related risk factors of metabolic origin, occurring together more often than by chance alone. MetS is a recognised risk factor for cardiovascular disease, several other chronic medical conditions and mortality. This study aimed to describe the prevalence of MetS in older adults in Ireland and to examine if this changed over a 4-year follow-up period.

Methods

This study used data collected as part of wave 1 and 3 of The Irish Longitudinal Study of Ageing (TILDA). Using objective measurements of triglycerides, high-density lipoprotein cholesterol, blood pressure, height, weight, waist circumference and glycated haemoglobin (HbA1c), in addition to medication usage, the prevalence of MetS using both the National Cholesterol Education Program Third Adult Treatment Panel criteria (ATPIII) and the International Diabetes Foundation criteria (IDF) were determined. Weights were used to allow the sample to be representative of the population. Weights for wave 3 included an adjustment for attrition between wave 1 and wave 3. Weighted logistic regression models were undertaken to examine the odds ratios for age, sex and educational attainment.

Results

32.5% of the community-dwelling population aged ≥50 years at wave 1 had MetS according to the ATPIII criteria, with 39.3% according to the IDF criteria. Males were 36% (ATPIII) or 53% (IDF) more likely than females to have MetS at wave 1. MetS was increasingly prevalent with age, and lower educational attainment at both waves. Prevalence had increased by wave 3 with 35.1% and 41.3% meeting the ATPIII and IDF criteria respectively.

Conclusion

The prevalence of MetS, a modifiable disorder, is very high and increasing in older adults in Ireland, with nearly 400,000 of the community-dwelling population ≥ 54 years at wave 3 meeting either the ATPIII or IDF criteria. More public health interventions are warranted.

165 WHAT FACTORS ARE ASSOCIATED WITH ADVANCED CARE PLANNING IN COMMUNITY-DWELLING OLDER PEOPLE?

Background

Advance Care Planning (ACP) involves expressing wishes regarding your future medical care and/or preferences about your end-of-life in the event of serious illness.

The aim of this study was to clarify the proportion of community-dwelling older people who engage in ACP and what factors are independently associated with ACP.

Methods

Participants aged ≥60 years (n = 4,831, mean age 71 years) at Wave 4 of the Irish Longitudinal Study on Ageing were asked: Have you made your wishes/preferences known about the kind of care that you would like to receive in the event of serious illness? If yes, they were asked if this had been documented informally (family/carers or medical professionals) or formally (by written advanced care plan).

Logistic regression models assessed the association of covariates of interest with ACP.

Results

One quarter of the study sample (1,153/4,831) had an ACP. Only 10% (119/1,153) had ACP documented in writing, while only 2% (27/1,153) had discussed ACP with a healthcare professional.

Age ≥ 80 years (OR 1.63 (1.31–2.02)), female sex (OR 1.58 (1.37–1.83)), higher educational attainment (OR 1.42 (1.18–1.71), poorer self-rated health (OR 1.58 (1.04–2.39) and lower levels of religiosity (OR 1.50 (1.03–2.19) were independently associated with ACP.

Conclusion

While ACP may have benefits in extending autonomy and facilitating decision-making, only 1 in 4 of this population-representative sample of older people had engaged in ACP, with only 1 in 50 having their ACP documented in writing.

Further work is therefore required to educate the public and healthcare professionals regarding the benefits of ACP.

190 FACTORS ASSOCIATED WITH ADHERENCE TO COVID-19 PUBLIC HEALTH GUIDELINES AMONG OLDER ADULTS IN IRELAND

Background

Older adults are at high risk from coronavirus 2019 (COVID-19). Even with the introduction of a widespread vaccination programme, adherence to public health guidelines continue to be of vital importance to reducing the spread of COVID-19. This study examines the factors associated with adherence to two public health guidelines, social distancing and mask wearing, among older adults (50 years and over) in Ireland.

Methods

Data from the Irish Longitudinal Study on Ageing (TILDA) COVID-19 study and previous waves of TILDA was used. The COVID-19 study data was collected between July 2020 and November 2020. Logistic regression analysis was conducted separately to examine the relationship between the independent variables and social distancing and mask wearing respectively. Along with socio-demographic variables, the Health Belief Model (HBM) was used to identify variables for inclusion in the analysis.

Results

In total, 2,816 participants were included in this study. Females were more likely than males to adhere to social distancing and mask wearing guidelines. Those most concerned about COVID-19 were more likely to adhere to both behaviours. Education levels were associated with adherence to both behaviours but the direction of the relationship differed. Those who trusted the Health Service Executive as a news source were more likely to socially distance, while those with less understanding of government guidance and those who trusted in government news sources were less likely to socially distance. Participants who were working were less likely to socially distance than those who weren’t. While, participants who were over 70 and those who returned the survey after the introduction of mandatory mask wearing were more likely to wear a mask. Participants who lived outside of Dublin were less likely to wear a mask.

Conclusion

Factors associated with adherence to public health guidelines vary according to the guideline. Differences between groups need to be considered when implementing policy around public health guidelines.

81 LONGER CHAIR-STAND TIME IS ASSOCIATED WITH ORTHOSTATIC INTOLERANCE IN AN OLDER IRISH POPULATION

Background

Hospital admissions for orthostatic hypotension (OH) have risen more than two-fold in the past ten years. OH can lead to orthostatic intolerance (OI), and both OH and OI are common causes of falls and injuries in older persons. Sarcopenia is also common in older persons and associated with adverse health outcomes. The 5-chair stand test (5-CST) can be used as a marker of sarcopenia and a cut-off of 15 s has been proposed. We hypothesized that those with a worse performance on the 5-CST would be at greater risk of OH and sought to investigate this in an older Irish population cohort study.

Methods

5-CST was measured in keeping with a standardised protocol. Beat-to-beat blood pressure was measured with the Finometer device according to the active stand protocol. Multivariable logistic regressions were performed to investigate the associations between OH at 40 seconds after standing (OH40), OI (dizziness after standing), and 5-CST time. Potential confounders were controlled for in the model including age, sex, education, body mass index and medications.

Results

Data from 3,119 participants were available for analysis. Mean age was 63.8 years, 55% were female, 25% took longer than 15s on the 5-CST and mean baseline blood pressure was 141/76 mmHg. Proportion of OH40 was 12.5% and 4.4% reported OI. In the multivariable model, OH40 was not independently associated with 5-CST time after controlling for age (p > 0.05). Worse performance on the chair stands test was however an independent predictor of OI (odds ratio 1.06, p = 0.039).

Conclusion

Longer time taken on the 5-CST, a marker of sarcopenia, was an independent predictor of OI in a large population study. The relationship between sarcopenia and orthostatic blood pressure response is not well elucidated. We plan to further investigate this area in a future clinical cohort.

37 ‘FRAIL’ BY DIFFERENT MEASURES: A COMPARISON OF 8-YEAR MORTALITY IN THE IRISH LONGITUDINAL STUDY ON AGEING (TILDA)

Background

Frailty is a state of dysregulation in multiple physiological systems and vulnerability to stressors. Many frailty identification tools exist that differ in their conceptualisation vis-à-vis morbidity, disability, cognition, and other geriatric assessment dimensions. We compared the ability of four different frailty identification tools to predict 8-year mortality in TILDA.

Methods

We included TILDA Wave 1 (2010) participants who had data for frail state classification according to four tools: the Fried’s physical Frailty Phenotype (FP: frail if ≥3 features present), Morley’s FRAIL scale (frail if ≥3), a 32-item Frailty Index (FI ≥ 0.25), and the Clinical Frailty Scale classification tree (CFS ≥ 5). Mortality was ascertained at Wave 5 (2018). Binary logistic regression models controlling for age and sex were computed for the extraction of Odds Ratios (OR) and 95% Confidence Intervals (CI).

Results

At Wave 1, there were 5,700 participants (mean age 63, range 50–98 years, 54% women) with data for frailty classification according to all four tools. The prevalences of frailty were 2.3% by FRAIL, 3.8% by FP, 10.9% by CFS, and 12.8% by FI. 8-year mortality proportions were 41.2%, 44.9%, 25.3% and 27.0%, respectively. The highest age and sex-adjusted OR for 8-year mortality was for FRAIL (OR 4.86, 95% CI 3.18–7.41, P < 0.001), followed by FP (OR 3.72, 95% CI 2.64–5.23, P < 0.001), FI (OR 2.20, 95% CI 1.76–2.74, P < 0.001), and CFS (OR 1.95, 95% CI 1.53–2.47, P < 0.001).

Conclusion

All four frailty tools significantly predicted 8-year mortality in TILDA, but FRAIL and FP seemed more specific. Different frailty identification tools may suit different population screening purposes.

204 FRAILTY BUT NOT AGE IS ASSOCIATED WITH IMPAIRED ORTHOSTATIC CEREBRAL OXYGENATION

Background

The effects of age and frailty on cerebrovascular function are poorly understood. Here we investigate the hypotheses that aging, and frailty are accompanied by impaired regulation of cerebral oxygenation during standing in a patient population of older adults.

Methods

We recruited patients from a national Falls and Syncope service. All patients underwent an active stand test (5–10 min lying, 3 min standing) with continuous monitoring of blood pressure (BP) and heart rate. Tissue saturation index (TSI) was concurrently measured using near-infrared spectroscopy and its recovery measured at 30s after standing. Frailty was assessed as a comorbidity count using a 27-item questionnaire. Robust linear regression was used to investigate the association between TSI, age and frailty in a multivariate model with covariate adjustment, including the concurrent BP values. A p-value <0.05 was considered significant.

Results

304 patients (median(IQR): 71(14) years, 57% females) were recruited. Age was not associated with cerebral oxygenation after standing (β: −0.001 (−0.017 0.015), p = 0.899), even after stratification by sex (males: β: −0.010 (−0.045 0.024), p = 0.558, females: β: 0.000 (−0.017 0.018), p = 0.967). Frailty, was associated with a lower TSI at 30s after standing (β: −0.153 (−0.248–0.058), p = 0.002). After sex stratification, no associations with frailty were observed in males (β: −0.052 (−0.226 0.123), p = 0.557), while frailer females demonstrated a lower TSI at 30 seconds after standing (β: −0.179 (−0.294–0.063), p = 0.003) despite BP correction.

Conclusion

Our results suggest alternative mechanisms of cerebral oxygenation regulation independent of blood pressure (and presumably cerebral autoregulation) are involved in frailty related impairments of brain haemodynamics which are also independent of ageing. Such impairments represent novel biomarkers of frailty and represent potentially novel modifiable risk factors (independent of BP management) of hypoperfusion related disorders in clinical ageing.

217 DO THE FRAIL EXPERIENCE ADVERSE EVENTS FROM INTENSIVE BLOOD PRESSURE CONTROL? FINDINGS FROM THE IRISH LONGITUDINAL STUDY ON AGEING(TILDA)

Background

The 2018 ESC/ESH guidelines for the management of arterial hypertension in adults aged ≥65 years recommend a blood pressure (BP) treatment target of 130–139/70–79 mmHg if tolerated. Randomised controlled trials have recommended lower BP. However, low BP may cause adverse outcomes, especially in the frail.We aimed to identify if older adults, frail and non-frail, in wave 1 of TILDA being treated intensely for hypertension experienced more adverse events by wave 2.

Methods

Data from participants aged ≥65 years treated for hypertension in Wave 1 was analysed.Frail/non-frail was identified by Frailty Phenotype (FP) and the Clinical Frailty Scale (CFS).Two blood pressure thresholds defined intensive control:<130/70 and < 110/70 mmHg.We formulated 16 baseline participant groups based on frailty-BP combinations.Outcomes at wave 2 were analysed with adjusted binary logistic regression models.

Results

1,920 participants at Wave 1 were aged ≥65 years and treated for hypertension. 1,229 participants had full BP/FP data, while 1,288 had complete BP/CFS data.The frail by FP with treated BP >130/70 or > 110/70 had a statistically significant risk of new TIA or stroke by Wave 2.The frail by CFS with treated BP >130/70 or > 110/70 had a statistically increased risk of recurrent falls and/or fractures, as did the frail by FP with treated BP >110/70. FP with treated BP <130/70 was associated with new heart failure. None of the frail-BP groups was independently predictive of cognitive decline,myocardial infarction, syncope or hospitalization. For the non-frail-BP groups,there was no increased risk of any of the outcomes.

Conclusion

Frail older adults treated to higher BP thresholds seemed to have more adverse short-term health outcomes compared to the frail treated more intensely. Overall, a BP of <130/70 did not seem associated with more adverse outcomes. This 2-year prospective study’s results of a community-dwelling cohort may not be generalisable to clinical populations.

171 THE ‘WISH TO DIE’ AMONGST OLDER PEOPLE IN IRELAND IN THE CONTEXT OF THE DYING WITH DIGNITY BILL

Background

‘Wish to Die’ (WTD) involves thoughts of or wishes for one’s own death or that one would be better off dead.

Assisted dying is the act of deliberately providing medical assistance to another person who wishes to end their own life. Currently, in Ireland, it is illegal to provide such assistance to people with WTD or suicidal ideation. However, a new bill that would legalise assisted dying for those with terminal illnesses, the Dying with Dignity Bill 2020, is due to be considered by lawmakers in Ireland in the coming months.

In order to inform discussion around this complex issue, we examine the prevalence and longitudinal course of WTD in a large population-representative sample of older people.

Methods

To define WTD, participants were asked: ‘In the last month, have you felt that you would rather be dead?’

Depressive symptoms were measured using the CES-D.

Mortality data were compiled by linking administrative death records to individual-level survey data from the study.

Results

At Wave 1, 3.5% of participants (279/8,174) reported WTD. Both persistent loneliness (OR 5.73 (95% CI 3.41–9.64)) and depressive symptoms (OR 6.12 (95% CI 4.33–8.67)) were independently associated with WTD.

Of participants who first reported WTD at Wave 1 or 2, 72% did not report WTD when reassessed after 2 years, and the prevalence of depressive symptoms (−44%) and loneliness (−19%) was more likely to decline in this group at follow-up.

Fifteen per cent of participants expressing WTD at Wave 1 died during a 6-year follow-up.

Conclusion

WTD amongst community-dwelling older people is frequently transient and is strongly linked with the course of depressive symptoms and loneliness.

An enhanced focus on improving access to mental health care and addressing social isolation in older people should therefore be a public health priority, particularly in the current context of the Covid-19 pandemic.

133 THE RELATIONSHIP BETWEEN DELAYED HEALTHCARE UTILISATION AND CHRONIC CONDITIONS AMONG OLDER ADULTS DURING THE COVID-19 PANDEMIC IN IRELAND

Background

The coronavirus 2019 (COVID-19) pandemic impacted significantly on the lives of older adults in Ireland, including the cancellation or postponement of healthcare services. This study examined the relationship between healthcare delay and older adults (50 years and over) with chronic conditions in Ireland.

Methods

This study used data from the Irish Longitudinal Study on Ageing (TILDA) COVID-19 study and previous waves of TILDA. The COVID-19 study data was collected between July 2020 and November 2020. Taking existing healthcare demand into account, logistic regression analysis was used to examine the relationship between healthcare delay and older adults with chronic conditions. Additional analysis, using multinomial logit regression, explored the reasons for healthcare delay, whether the delays were on the participants behalf or the health service provider.

Results

In total, 31.6% of participants reported healthcare delay. Older adults with two or more chronic conditions were more likely to experience healthcare delay than those with no chronic conditions. In the second analysis, older adults with two or more chronic conditions were more likely to have healthcare delayed by the provider and were also more likely to delay their own healthcare than those with no chronic conditions. Additionally, some other groups were more likely to experience healthcare delay such as: people aged 70 years and over, females, those with problematic alcohol consumption, those with third-level education, those who had visited the GP and those who reported polypharmacy. While older adults living with others and those living outside Dublin were less likely to experience healthcare delay.

Conclusion

The findings suggest that some groups of older adults may have been impacted more than others by healthcare delay during the pandemic. Policy and practice should focus on effective strategies to support the healthcare needs of these older adults going forward. Additionally, future research should examine the implications of healthcare delay on health outcomes.

201 THE BI-DIRECTIONAL ASSOCIATION BETWEEN LONELINESS AND DEPRESSION, BEFORE AND DURING THE COVID-19 PANDEMIC

Background

Methods

Results

Conclusion

123 ACUTE-PHASE BED-REST DURATION WAS ASSOCIATED WITH LOWER GRIP STRENGTH IN A POST-COVID-19 COHORT

Background

Though age-related muscle loss is traditionally associated with older cohorts, strong evidence suggests a life-spanning precipitation of decreasing muscle mass and strength beginning as early as the fourth decade of life, with established deleterious consequences for later-life morbidity and mortality. Periods of low activity and bed rest (LA/BR) can further compound this depletion of muscle strength. Our aim was to examine such associations in a post-COVID-19 cohort.

Methods

Participants reporting ongoing symptomatology and fatigue post COVID-19 underwent assessments of grip strength via hand-held dynamometry (2 measures on each hand). Demographics of COVID-19 illness, including time since diagnosis, duration of LA/BR during acute illness, and levels of fatigue were captured via self-reported questionnaires. Independent predictors of mean grip strength were investigated using a linear regression model.

Results

Forty-nine participants underwent assessments (69% female, mean age 44(12) years). At the time of assessment, days post COVID-19 diagnosis ranged from 39–522 (mean 262(140)). The mean self-reported period of LA/BR during the acute illness was 15(18) days. In general, participants reported significant levels of fatigue (median Chalder Fatigue Scale score 22(8)). Mean grip strength was 41.3(6.3) Kg for men and 22.8(6.7) Kg for women. When predictors of grip strength were investigated, an increased duration of LA/BR was found to be associated with lower grip strength, independently of age, gender, time since COVID-19 diagnosis, and self-reported fatigue (Beta = −0.158, 95% Confidence Interval − 0.242 to −0.074, p = 0.001).

Conclusion

In this cohort, every day of LA/BR during acute COVID-19 illness was independently associated with subsequent lower grip strength of approximately 150 g. These results underscore the importance of early mobilization and discouraging bed rest in the acute phase of COVID-19. Patients who are isolating should be encouraged to maintain physical activity and muscle strength as part of a modified isolation-friendly rehabilitation programme.

239 IS ORTHOSTATIC HYPOTENSION ASSOCIATED WITH ALTERED CEREBRAL PERFUSION DURING ACTIVE STANDING?

Background

Orthostatic Hypotension (OH) is associated with poor health outcomes in later life including depression, cognitive impairment, frailty and falls. Whilst it is hypothesised that OH compromises cerebral autoregulation leading to hypoperfusion, this has not been robustly demonstrated to date. This study investigated the association between OH and cerebral perfusion during orthostasis using a non-invasive surrogate of cerebral perfusion, Near Infrared Spectroscopy (NIRS).

Methods

Four hundred and ninety one participants (58% female, median age 65, IQR 38–92) attending a falls and syncope service underwent measurement of beat-to-beat blood pressure (BP) by finometry and real-time frontal lobe perfusion (% TSI: Tissue Saturation Index) by NIRS during the active stand manoeuvre. We examined the association between OH and change in cerebral perfusion (delta TSI) using mixed-effects linear regression, with adjustment for important clinical covariates.

Results

Nearly two-fifths of the sample (189/491,38.5%) met criteria for OH occurring between 30 and 120 seconds after standing. Using mixed effects linear regression models, we observed a significant relationship between OH and TSI at the same timepoint (β −0.53, −0.59 to −0.46, p < 0.001) which persisted following adjustment for confounders including age, sex, baseline blood pressure, cerebrovascular and cardiovascular disease, depression/anxiety, diabetes, systolic blood pressure, antihypertensives, and antidepressants (β −0.51, −0.58 to −0.44, p < 0.001). Cerebral perfusion levels differed for those with OH compared to those without.

Conclusion

OH is independently associated with lower frontal lobe cerebral perfusion. This association may indicate disruption to dynamic cerebral autoregulation and explain the significant link between OH and poor health outcomes.

224 METABOLIC SYNDROME ASSOCIATED WITH INCREASED LIKELIHOOD OF INCIDENT FRAILTY

Background

Frailty and metabolic syndrome (MetS) are both associated with increased mortality. This study aimed to examine the association between MetS and incident frailty in older adults in Ireland over a 4-year follow-up period.

Methods

This study used data from wave 1 and 3 of The Irish Longitudinal Study of Ageing (TILDA). Frailty status was operationalised using Fried’s frailty phenotype (FP). FP was determined at both waves. MetS was determined at wave 1, according to the National Cholesterol Education Program Third Adult Treatment Panel (ATPIII) and the International Diabetes Foundation (IDF) criteria. Those who were frail/pre-frail at wave 3 having been classified as non-frail at wave 1 were deemed to have ‘worsening frailty’, while those non-frail at both waves were deemed ‘stable non-frail’. Logistic regression models examined the association between MetS and worsening frailty compared to stable non-frail.

Results

FP was determined for 3,317 participants at both wave 1 and wave 3 of TILDA, of which 970 (29%) and 1,201 (36%) had MetS at wave 1 according to ATPIII and IDF criteria respectively. 664 (20%) had worsening frailty, while 1,624 (49%) were stable non-frail. Adjusted for age, sex and education, MetS was associated with an increased likelihood of worsening frailty, for both ATPIII and IDF criteria, OR 1.70 (p < 0.001) and OR 1.63 (p < 0.001) respectively. This association persisted when further adjusted for smoking history, chronic conditions (excluding diabetes and hypertension), renal function and micronutrients [OR 1.50, p = 0.001 (ATPIII) and OR 1.46, p = 0.001 (IDF)].

Conclusion

MetS increases the likelihood of incident frailty/pre-frailty by approximately 50% over a 4-year period. MetS should be considered a risk factor for frailty and should be considered in any comprehensive geriatric assessment given the dynamic nature of frailty and the potentially modifiable nature of MetS.

78 HIGHER NEUROVASCULAR SIGNAL ENTROPY IS ASSOCIATED WITH ACCELERATED BRAIN AGEING

Background

Often chronological age is not the most accurate marker of an individual’s health status since ageing is a heterogeneous process across individuals. Machine learning can be used to quantify the relationship between structural brain MRI data and chronological age, to estimate an individual’s ‘brain age’, which, when subtracted from chronological age, provides a brain predicted-age difference score (BrainPAD) [1]. BrainPAD reflects the biological ageing of the brain. Increased complexity in neurovascular signals has been shown to be associated with poorer cognitive performance and physical frailty [2]. The aim of this study was to investigate associations between the complexity of frontal-lobe oxygenation (tissue saturation index (TSI)) data and BrainPAD in a cohort of older community-dwelling adults.

Methods

To calculate BrainPAD, machine learning was applied to 1,359 T1-weighted MRI brain scans from various open-access repositories, and this model was subsequently applied to MRI data acquired from the study cohort. TSI was non-invasively measured in the left frontal lobe using near-infrared spectroscopy. TSI data were acquired continuously during five minutes of supine rest and the last minute was utilized in this analysis. The complexity of TSI signals was quantified using sample entropy (SampEn). Multivariable linear regression was employed, controlling for age, sex, education, antihypertensive medications, diabetes, cardiovascular conditions, smoking, alcohol, depression, BMI, physical activity, and blood pressure.

Results

Complete data were available for 397 individuals (age: 67.9 ± 7.7 years; 53.7% female). An increase in TSI SampEn of 0.1 was associated with an increase in BrainPAD of 0.9 years (P = 0.007, 95%CIs: 0.3 to 1.6). Similar results were found with and without the inclusion of chronological age in the models.

Conclusion

This study reports significant associations between higher complexity in peripherally measured frontal lobe oxygenation concentration and accelerated brain ageing.

References

1. Boyle R. et al. Brain Imaging and Behavior. 15,327–345 (2021) https://doi.org/10.1007/s11682-020-00260-3.

2. Knight S. et al. Entropy. 23(1):4 (2021) https://doi.org/10.3390/e23010004.

200 AN EXAMINATION OF THE FACTORS ASSOCIATED WITH PNEUMOCOCCAL VACCINATION UPTAKE IN THE OVER 50’S IN IRELAND

Background

Community acquired pneumonia presents a significant risk for morbidity and mortality in older adults. We aimed to look at the prevalence of pneumococcal vaccination in the over 50’s as well as which factors may influence it’s uptake by this group by using a nationally representative sample of adults from The Irish Longitudinal Study on Ageing (TILDA), a population-based study of community dwelling adults aged ≥50 years.

Methods

Cross-sectional data from the fifth wave of TILDA data collection (n = 5,020) was analysed. Several self-reported measures of pneumococcal vaccination uptake were examined that covered questions such as whether they had received a pneumococcal vaccination and whether any healthcare professionals had discussed vaccination with them. Logistic regression was performed to examine whether differing levels of healthcare entitlement was associated with higher pneumococcal vaccination uptake when adjusting for factors such as age, sex, education and self-reported health.

Results

Of the 5,206 participants over 50 who took part in Wave 5 data collection, 22.97% had reported receiving a pneumococcal vaccination. Of the 4,020 individuals who have not received a pneumococcal vaccination, only 5.79% had their GP discuss pneumococcal vaccination with them, 6.18% had discussed it with other providers such as nurses & pharmacists and 88.03% reported that they had never been spoken to about pneumococcal vaccination by any of their healthcare providers. Medical card coverage, OR = 2.48 (CI = 1.64:3.74, p = <.000) and dual coverage, OR = 3.71 (CI = 2.45:5.61, p = <.000) were associated with higher rates of pneumococcal vaccination but this association was not present with insurance coverage only, OR = 1.18 (CI = 0.778:1.79, p = <.431).

Conclusion

These findings suggest that differences in levels of healthcare entitlement can affect access to preventative measures such as routine vaccinations, with those with both insurance coverage and a medical card being most likely to be vaccinated. It has also highlighted a need for more healthcare professionals to discuss routine pneumococcal vaccination with their patients.

Physical and mental health of older people while cocooning during the COVID-19 pandemic

BACKGROUND

Cocooning or shielding, i.e. staying at home and reducing face-to-face interaction with other people, was an important part of the response to the COVID-19 pandemic for older people. However, concerns exist regarding the long-term adverse effects cocooning may have on their physical and mental health.

AIM

To examine health trajectories and healthcare utilization while cocooning in a cohort of community-dwelling people aged ≥70 years.

DESIGN

Survey of 150 patients (55% female, mean age 80 years and mean Clinical Frailty Scale Score 4.8) attending ambulatory medical services in a large urban university hospital.

METHODS

The survey covered four broad themes: access to healthcare services, mental health, physical health and attitudes to COVID-19 restrictions. Survey data were presented descriptively.

RESULTS

Almost 40% (59/150) reported that their mental health was 'worse' or 'much worse' while cocooning, while over 40% (63/150) reported a decline in their physical health. Almost 70% (104/150) reported exercising less frequently or not exercising at all. Over 57% (86/150) of participants reported loneliness with 1 in 8 (19/150) reporting that they were lonely 'very often'. Half of participants (75/150) reported a decline in their quality of life. Over 60% (91/150) agreed with government advice for those ≥70 years but over 40% (61/150) reported that they disliked the term 'cocooning'.

CONCLUSIONS

Given the likelihood of further restrictions in coming months, clear policies and advice for older people around strategies to maintain social engagement, manage loneliness and continue physical activity and access timely medical care and rehabilitation services should be a priority.

Frailty is associated with impaired cerebral oxygenation recovery during

 

Frailty is associated with impaired peripheral circulatory responses to standing in older adults. However, little is known about how frailty affects cerebrovascular function during such activities of daily living. Here we investigate the association between frailty and cerebral oxygenation during standing in a large clinical cohort of fallers and fainters.

Participants were recruited from a national Falls and Syncope unit and underwent an active stand test (5–10 minutes lying supine, 3 minutes standing) with concurrent monitoring of continuous blood pressure (BP) and heart rate (HR) and tissue saturation index (TSI) using near-infrared spectroscopy (NIRS). Frailty was measured using a count of deficits (27 morbidities). Robust linear regression was applied to study the association between features of dynamic cerebral oxygenation (changes from baseline at nadir, overshoot, 30s and steady state; and recovery rate) and frailty while correcting for covariates. A p-value <0.05 was considered significant.

Frailty was associated with deficits in TSI at 30s after standing (β: −0.165, CI: (−0.261, −0.069), p=0.005), as well as a lower diastolic BP at 30s (β: −1.346, CI: (−2.287, −0.405), p=0.032) and standing steady-state (β: −1.182, CI: (−2.038, −0.325), p=0.032). When stratified by gender, frailty was associated in women with a lower TSI at overshoot (β: −0.174, CI: (−0.312, −0.037), p=0.043) and 30s (β: −0.216 (−0.344, −0.089), p=0.010), and impaired DBP recovery at overshoot (β: −1.623, CI: (−2.865, −0.391), p=0.045) and attenuated HR response at 30s (β: −0.701, CI: (−1.246, −0.155), p=0.036). No associations were found in men.

Impaired cerebral oxygenation and BP responses to standing are associated with frailty in patients with falls and syncope, with stronger effects in women, suggesting that frailty may increase risk of hypoperfusion and consequent syncope, falls, and brain ageing. Our results demonstrate the clinical utility and feasibility of using NIRS in this context which can be used to further personalise patient management.

Funding Acknowledgement

Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Irish Research Council Cerebral oxygenation and frailty

Verbal intelligence is a more robust cross-sectional measure of cognitive reserve than level of education in healthy older adults

BACKGROUND

Cognitive reserve is most commonly measured using socio-behavioural proxy variables. These variables are easy to collect, have a straightforward interpretation, and are widely associated with reduced risk of dementia and cognitive decline in epidemiological studies. However, the specific proxies vary across studies and have rarely been assessed in complete models of cognitive reserve (i.e. alongside both a measure of cognitive outcome and a measure of brain structure). Complete models can test independent associations between proxies and cognitive function in addition to the moderation effect of proxies on the brain-cognition relationship. Consequently, there is insufficient empirical evidence guiding the choice of proxy measures of cognitive reserve and poor comparability across studies.

METHOD

In a cross-sectional study, we assessed the validity of 5 common proxies (education, occupational complexity, verbal intelligence, leisure activities, and exercise) and all possible combinations of these proxies in 2 separate community-dwelling older adult cohorts: The Irish Longitudinal Study on Ageing (TILDA; N = 313, mean age = 68.9 years, range = 54-88) and the Cognitive Reserve/Reference Ability Neural Network Study (CR/RANN; N = 234, mean age = 64.49 years, range = 50-80). Fifteen models were created with 3 brain structure variables (grey matter volume, hippocampal volume, and mean cortical thickness) and 5 cognitive variables (verbal fluency, processing speed, executive function, episodic memory, and global cognition).

RESULTS

No moderation effects were observed. There were robust positive associations with cognitive function, independent of brain structure, for 2 individual proxies (verbal intelligence and education) and 16 composites (i.e. combinations of proxies). Verbal intelligence was statistically significant in all models. Education was significant only in models with executive function as the cognitive outcome variable. Three robust composites were observed in more than two-thirds of brain-cognition models: the composites of (1) occupational complexity and verbal intelligence, (2) education and verbal intelligence, and (3) education, occupational complexity, and verbal intelligence. However, no composite had larger average effects nor was more robust than verbal intelligence alone.

CONCLUSION

These results support the use of verbal intelligence as a proxy measure of CR in cross-sectional studies of cognitively healthy older adults.