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Open Access 01-12-2019 | Hypotension | Research article

Relationships between orthostatic hypotension, frailty, falling and mortality in elderly care home residents

Authors: Brett H. Shaw, Dave Borrel, Kimiya Sabbaghan, Colton Kum, Yijian Yang, Stephen N. Robinovitch, Victoria E. Claydon

Published in: BMC Geriatrics | Issue 1/2019

Abstract

Background

Orthostatic hypotension (OH; profound falls in blood pressure when upright) is a common deficit that increases in incidence with age, and may be associated with falling risk. Deficit accumulation results in frailty, regarded as enhanced vulnerability to adverse outcomes. We aimed to evaluate the relationships between OH, frailty, falling and mortality in elderly care home residents.

Methods

From the Minimum Data Set (MDS) document, a frailty index (FI-MDS) was generated from a list of 58 deficits, ranging from 0 (no deficits) to 1.0 (58 deficits). OH was evaluated from beat-to-beat blood pressure and heart rate (finger plethysmography) collected during a 15-min supine-seated orthostatic stress test. Retrospective and prospective falling rates (falls/year) were extracted from facility falls incident reports. All-cause 3-year mortality was determined. Data are reported as mean ± standard error.

Results

Data were obtained from 116 older adults (aged 84.2 ± 0.9 years; 44% males) living in two long term care facilities. The mean FI-MDS was 0.36 ± 0.01; FI-MDS was correlated with age (r = 0.277; p = 0.003). Those who were frail (FI ≥ 0.27) had larger Initial (− 17.8 ± 4.2 vs − 6.1 ± 3.3 mmHg, p = 0.03) and Consensus (− 22.7 ± 4.3 vs − 11.5 ± 3.3 mmHg, p = 0.04) orthostatic reductions in systolic arterial pressure. Frail individuals had higher prospective and retrospective falling rates and higher 3-year mortality. Receiver operating characteristic curves evaluated the ability of FI-MDS alone to predict prospective falls (sensitivity 72%, specificity 36%), Consensus OH (sensitivity 68%, specificity 60%) and 3-year mortality (sensitivity 77%, specificity 49%). Kaplan Meier survival analyses showed significantly higher 3-year mortality in those who were frail compared to the non-frail (p = 0.005).

Conclusions

Frailty can be captured using a frailty index based on MDS data in elderly individuals living in long term care, and is related to susceptibility to orthostatic hypotension, falling risk and 3-year mortality. Use of the MDS to generate a frailty index may represent a simple and convenient risk assessment tool for older adults living in long term care. Older adults who are both frail and have impaired orthostatic blood pressure control have a particularly high risk of falling and should receive tailored management to mitigate this risk.

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Title: Relationships between orthostatic hypotension, frailty, falling and mortality in elderly care home residents
Authors: Brett H. Shaw
Dave Borrel
Kimiya Sabbaghan
Colton Kum
Yijian Yang
Stephen N. Robinovitch
Victoria E. Claydon
Publication date: 01-12-2019
Publisher: BioMed Central
Keywords: Hypotension
Elderly Care
Hypotension
Published in: BMC Geriatrics / Issue 1/2019
Electronic ISSN: 1471-2318
DOI: https://doi.org/10.1186/s12877-019-1082-6

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