An interRAI-derived frailty index is associated with prior hospitalisations in older adults residing in retirement villages

Changes in hospitalisation rates in older people before and after moving to a retirement village

OBJECTIVES

An increasing proportion of older people live in Retirement Villages ('villages'). This population cites support for health-care issues as one reason for relocation to villages. Here, we examine whether relocation to villages is associated with a decline in hospitalisations.

METHODS

Retrospective, before-and-after observational study.

SETTING

Retirement villages, Auckland, New Zealand.

PARTICIPANTS

466 cognitively intact village residents (336 [72%] female); mean (SD) age at moving to village was 73.9 (7.7) years. Segmented linear regression analysis of an interrupted time-series design was used.

MAIN OUTCOME MEASURES

all hospitalisations for 18 months pre- and postrelocation to village.

SECONDARY OUTCOME

acute hospitalisations during the same time periods.

RESULTS

The average hospitalisation rate (per 100 person-years) was 44.9 (95% confidence interval [CI] = 36.3-55.6) 18-10 months before village relocation, 58.9 (95% CI = 48.3-72.0) 9-1 months before moving, 47.9 (95% CI = 38.8-59.1) 1-9 months after moving and 62.4 (95% CI = 51.2-76.0) 10-18 months after moving. Monthly average hospitalisation rate (per 100 person-years) increased before relocation to village by an average of 1.2 (95% CI = 0.01-1.57, p = .04) per month from 18 to 1 month before moving, and there was a change in the level of the monthly average hospitalisation rate immediately after relocation (mean difference [MD] = -18.4 per 100 person-years, 95% CI = -32.8 to -4.1, p = .02). The trend change after village relocation did not differ significantly from that before moving.

CONCLUSIONS

Although we cannot reliably claim causality, relocation to a retirement village is, for older people, associated with a significant but non-sustained reduction in hospitalisation.

"Making an effort for the very elderly": The acceptability of a multidisciplinary intervention to retirement village residents

The retirement village (RV) population is a growing one, with many residents having unmet healthcare needs. Despite this, there is a relative paucity of research in the RV community. We previously performed a randomised controlled trial (RCT) of a multidisciplinary (MD) nurse-led community intervention versus usual care within 33 RVs in Auckland, New Zealand. Participant acceptability is an important aspect in assessing intervention feasibility and effectiveness. The aim of this current qualitative study was to assess the acceptability of the intervention in participating residents. Data were collected using semi-structured interviews designed around the Theoretical Framework of Acceptability. Thematic analysis was undertaken using a general inductive approach. Of the 199 participants in the intervention arm of the original RCT, 27 were invited to take part in this qualitative study. Fifteen participants were recruited with a median age of 89 years, 10 were female and all were of European ethnicity. Participants were generally positive about the intervention and research processes. Three themes were identified: (1) participants' understanding of intervention aims and effectiveness; (2) the importance of older adult involvement and (3) level of comfort in the research process. Despite the MD intervention being deemed acceptable across several domains, results provided learning points for the future design of MD interventions in RV residents and older adults more generally. We recommend that future intervention studies incorporate co-design methodologies which may improve the likelihood of intervention success.

An interRAI derived frailty index predicts acute hospitalizations in older adults residing in retirement villages: A prospective cohort study

Objectives

The development of frailty tools from electronically recorded healthcare data allows frailty assessments to be routinely generated, potentially beneficial for individuals and healthcare providers. We wished to assess the predictive validity of a frailty index (FI) derived from interRAI Community Health Assessment (CHA) for outcomes in older adults residing in retirement villages (RVs), elsewhere called continuing care retirement communities.

Design

Prospective cohort study.

Setting and participants

34 RVs across two district health boards in Auckland, Aotearoa New Zealand (NZ). 577 participants, mean age 81 years; 419 (73%) female; 410 (71%) NZ European, 147 (25%) other European, 8 Asian (1%), 7 Māori (1%), 1 Pasifika (<1%), 4 other (<1%).

Methods

interRAI-CHA FI tool was used to stratify participants into fit (0–0.12), mild (>0.12–0.24), moderate (>0.24–0.36) and severe (>0.36) frail groups at baseline (the latter two grouped due to low numbers of severely frail). Primary outcome was acute hospitalization; secondary outcomes included long-term care (LTC) entry and mortality. The relationship between frailty and outcomes were explored with multivariable Cox regression, estimating hazard ratios (HRs) and 95% confidence intervals (95%CIs).

Results

Over mean follow-up of 2.5 years, 33% (69/209) of fit, 58% (152/260) mildly frail and 79% (85/108) moderate-severely frail participants at baseline had at least one acute hospitalization. Compared to the fit group, significantly increased risk of acute hospitalization were identified in mildly frail (adjusted HR = 1.88, 95%CI = 1.41–2.51, p<0.001) and moderate-severely frail (adjusted HR = 3.52, 95%CI = 2.53–4.90, p<0.001) groups. Similar increased risk in moderate-severely frail participants was seen in LTC entry (adjusted HR = 5.60 95%CI = 2.47–12.72, p<0.001) and mortality (adjusted HR = 5.06, 95%CI = 1.71–15.02, p = 0.003).

Conclusions and implications

The FI derived from interRAI-CHA has robust predictive validity for acute hospitalization, LTC entry and mortality. This adds to the growing literature of use of interRAI tools in this way and may assist healthcare providers with rapid identification of frailty.

Prevalence of frailty and mobility disability in older people living in retirement villages

OBJECTIVE

To determine the prevalence rates of frail, prefrail, robust and mobility disabled older adults living in retirement villages within regional Victoria, Australia.

METHODS

This cross-sectional, observational study invited residents of retirement villages to complete the self-report questionnaires Fried Frailty Phenotype and Frail Non-Disabled screening tool to classify respondents as frail, prefrail, robust and/or mobility disabled.

RESULTS

From 212 respondents, prevalence rates of frail and prefrail status were 34% and 35%, respectively. A fifth (20%) of residents were mobility disabled. The prevalence of residents classified as frail or prefrail (ie, not robust) was higher in women (74%) than in men (58%). Classification as not robust increased with increasing age.

CONCLUSIONS

This study is the first to estimate prevalence rates of frailty and mobility disability in retirement village residents in regional Australia. Findings from this study have potential to inform the development of facilities and programs to support people living in this setting.