Life-space mobility assessment in older people in Finland; measurement properties in winter and spring

Objectively Measured Physical Activity and Changes in Life-Space Mobility Among Older People

BACKGROUND

Our aim was to study the relationship between objectively measured physical activity and subsequent changes in life-space mobility over 2 years among older people. Life-space mobility refers to the area a person moves through in daily life, taking into account frequency, and need of assistance. Life-space mobility and physical activity correlate, but whether different intensities of objectively assessed physical activity predicts decline in life-space mobility is not known.

METHODS

Prospective cohort study of the "Life-space Mobility in Old Age" (LISPE) project accelerometer substudy. Participants were community-dwelling older people aged 75-90 (n = 164). Life-space mobility was measured with the Life-Space Assessment at baseline face-to-face home interview and telephone follow-up interviews 1 and 2 years after baseline. Physical activity (step count and time spent in moderate activity, low activity, and sedentary behavior) was measured by a tri-axial accelerometer (Hookie "AM20 Activity Meter") for 7 days at baseline. Generalized estimating equations (GEE models) were used to compare changes in life-space mobility between participants categorized according to the baseline physical activity measures.

RESULTS

Median age of the participants was 79.5 (IQR 6.7) and 64% were women. Over the 2 years, life-space mobility declined significantly among those with lower step counts and less time spent in moderate activity measured at baseline. Time spent in low activity and sedentary behavior did not predict changes in life-space mobility.

CONCLUSIONS

In old age, more time spent walking outdoors and accumulation of moderate-intensity physical activity may help to maintain higher life-space mobility, a correlate of good quality of life.

Identification of Older People at Risk of ADL Disability Using the Life-Space Assessment: A Longitudinal Cohort Study

OBJECTIVES

Life-space mobility, assessed with the Life-Space Assessment (LSA), reflects an individual's mobility in terms of the spatial area, frequency, and need for assistance. The aims were to study associations between life-space mobility and disability status in activities of daily living (ADL), and to define cutoff scores for baseline LSA and LSA change over time identifying individuals who developed ADL inability during 2 years of follow-up. Robustness of the cutoff scores was tested accounting for potential confounders.

DESIGN

Longitudinal analyses of the "Life-space mobility in old age" cohort study.

SETTING

Home-based interviews at baseline and phone interviews 2 years later.

PARTICIPANTS

A total of 755 community-dwelling 75- to 90-year-old people living in Central Finland.

MEASUREMENTS

LSA score (range 0-120) and ADL disability status (no difficulty, difficulty in ≥1 tasks, or inability in ≥1 tasks) were determined based on self-reports.

RESULTS

Participants who developed difficulty or inability in ADL over time presented lower LSA scores at baseline and larger declines compared to those who remained without task difficulty or inability during the follow-up, respectively. Sensitivity and specificity analyses showed that baseline LSA ≤52.3 (0.86 and 0.74, respectively) and LSA decline of >11.7 (0.76 and 0.71, respectively) identified participants who developed ADL inability over the follow-up. Multinomial regression showed that, after adjustment for potential confounders, these cutoff scores increased the odds to develop new difficulty in ADL tasks, and the odds to develop ADL inability among those with baseline difficulty.

CONCLUSION

Our results suggest that restrictions and declines in life-space mobility may be early signs of increasing vulnerability to disability in old age. These longitudinally defined cutoff points may help to find clinical applications for the LSA.

Personal goals and changes in life-space mobility among older people

OBJECTIVE

Life-space mobility - the spatial extent of mobility in daily life - is associated with quality of life and physical functioning but may also be influenced by future orientation expressed in personal goals. The aim of this study was to explore how different personal goals predict changes in older people's life-space mobility.

METHODS

This prospective cohort study with a 2-year follow-up included 824 community-dwelling people aged 75 to 90 years from the municipalities of Jyväskylä and Muurame in Central Finland. As part of the Life-Space Mobility in Old Age study (LISPE), which was conducted between 2012 and 2014, the participants responded to the Life-Space Assessment and Personal Project Analysis in addition to questions on socio-demographics and health. Data were analyzed using generalized estimation equation models.

RESULTS

The results showed that goals indicating a desire to be active in daily life, to stay mentally alert, and to exercise were associated with higher life-space mobility, and that the associations remained over the follow-up years. Goals related to maintaining functioning predicted higher life-space mobility at the 2-year follow-up. In contrast, goals reflecting improvement of poor physical functioning predicted lower life-space mobility. The results remained significant even when adjusted for indicators of health and functioning.

CONCLUSIONS

This study indicates that supporting older people in striving for relevant personal goals in their lives might contribute to a larger life-space and thus also to improved quality of life in old age.

Self-reported hearing difficulties and changes in life-space mobility among community-dwelling older adults: a Two-year follow-Up study

BACKGROUND

Life-space mobility reflects individuals' actual mobility and engagement with society. Difficulty in hearing is common among older adults and can complicate participation in everyday activities, thus restricting life-space mobility. The aim of this study was to examine whether self-reported hearing predicts changes in life-space mobility among older adults.

METHODS

We conducted a prospective cohort study of community-dwelling older adults aged 75-90 years (n = 848). At-home face-to-face interviews at baseline and telephone follow-up were used. Participants responded to standardized questions on perceived hearing at baseline. Life-space mobility (the University of Alabama at Birmingham Life-Space Assessment, LSA, range 0-120) was assessed at baseline and one and two years thereafter. Generalized estimating equations were used to analyze the effect of hearing difficulties on changes in LSA scores.

RESULTS

At baseline, participants with major hearing difficulties had a significantly lower life-space mobility score than those without hearing difficulties (mean 54, 95 % CI 50-58 vs. 57, 95 % CI 53-61, p = .040). Over the 2-year follow-up, the life-space mobility score declined in all hearing categories in a similar rate (main effect of time p < .001, group x time p = .164). Participants with mild or major hearing difficulties at baseline had significantly higher odds for restricted life-space (LSA score < 60) at two years (OR 1.8, 95 % CI 1.0-3.2 and 2.0, 95 % CI 1.0-3.9, respectively) compared to those without hearing difficulties. The analyses were adjusted for chronic conditions, age, sex and cognitive functioning.

CONCLUSIONS

People with major hearing difficulties had lower life-space mobility scores at baseline but did not exhibit accelerated decline over the follow-up compared to those without hearing difficulties. Life-space mobility describes older people's possibilities for participating in out-of-home activities and access to community amenities, which are important building blocks of quality of life in old age. Early recognition of hearing difficulties may help prevent life-space restriction.

Feasibility of screening for preinjury frailty in hospitalized injured older adults

BACKGROUND

Frailty assessment of injured older adults (IOAs) is important for clinical management; however, the feasibility of screening for preinjury frailty has not been established in a Level I trauma center. The aims of our study were to assess enrollment rates of IOAs and their surrogates as well as completion rates of selected brief frailty screening instruments.

METHODS

We conducted a prospective cohort study on patients, age 65 years and older with a primary injury diagnosis. Patients and/or surrogates were interviewed within 48 hours of admission using the Vulnerable Elders Survey (VES-13), Barthel Index (BI), and the Life Space Assessment (LSA). Data analysis included frequency distributions, χ statistics, Mann-Whitney and Kruskal-Wallis tests, and general linear modeling (analysis of variance).

RESULTS

Of 395 admitted patients, 188 were enrolled with subsequent surrogate screening. Corresponding patient interviews were conducted for 77 patients (41%). Screening time was less than 5 minutes for each instrument, and item completion was 100%. Forty-two enrolled patients (22%) had nurse-reported delirium, and 69 (37%) patients either did not feel like answering questions or were unable to be interviewed secondary to their medical condition. The median score of surrogate responses for the VES-13 was 3.5 (interquartile range, 2-7), with 64% of the sample having a score of 3 or greater, indicating vulnerability or frailty. Median scores for the BI (19.0) and LSA (56.0) indicated high numbers with limitations in activities of daily living and limitations in mobilization.

CONCLUSION

Screening for preinjury frailty in IOAs is feasible yet highly dependent on the presence of a surrogate respondent. A clinically significant percentage of patients have functional deficits consistent with frailty, dependence in activities of daily living, and limitations in mobilization. Implementation of validated brief screening instruments to identify frailty in clinical settings is warranted for targeting timely, efficient, and effective care interventions.

LEVEL OF EVIDENCE

Epidemiologic study, level II.

Seasonal changes in activity levels among nursing care insurance service users in areas with different climates

[Purpose] To clarify seasonal changes in activity levels among nursing care insurance service users in areas with different climates using the Life Space Assessment. [Subjects] A total of 72 nursing care insurance service users aged ≥65 years, who were from areas along the Sea of Japan or those around the Inland Sea. [Methods] The subjects were divided into 2 groups according to their home prefecture, and each survey was conducted over two successive seasons (Survey I: fall and winter, n=48, Survey II: winter and spring, n=24). We investigated the subjects' basic information, and determined their FIM, the Life Space Assessment, and Modified Falls Efficacy Scale scores. These scores were subjected to between-group and -season comparisons. [Results] In Survey I, there were no significant differences in any investigation item between the 2 groups, but the Japan Sea group showed decreases in the Life Space Assessment, Independent Life space, and Minimal Life space scores in winter. In Survey II, we did not note any between-group or -season differences. [Conclusion] Our findings suggest that the Life Space Assessment, whose scores are influenced by outdoor environments, may be used as a tool to clarify seasonal changes in activity levels of nursing care insurance service users.

Associations between environmental characteristics and life-space mobility in community-dwelling older people

OBJECTIVE

To examine the association between perceived environmental barriers to and facilitators for outdoor mobility with life-space among older people.

METHODS

Community-dwelling, 75- to 90-year-old people (n = 848) were interviewed face-to-face using standard questionnaires. The Life-Space Assessment (LSA), indicating distance and frequency of moving and assistance needed in moving (range 0-120), was used. Environmental barriers and facilitators outdoors were self-reported.

RESULTS

Altogether, 41% (n = 348) of the participants had restricted life-space (LSA score < 60). Those reporting one or more environmental barriers had more than double the odds for restricted life-space compared with those reporting no barriers after adjustments for ill health, functioning, and socioeconomic status (SES) differences. Similarly, those reporting four to seven facilitators had lower odds for restricted life-space compared with those reporting three or fewer facilitators.

DISCUSSION

Perceptions of one's environment may either constrain or extend older people's life-space. Longitudinal studies are needed to study the causality of the findings.