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

Portegijs, Erja, Iwarsson, Susanne, Rantakokko, Merja, Viljanen, Anne and Rantanen, Taina (2014) Life-space mobility assessment in older people in Finland; measurement properties in winter and spring. BMC Research Notes, 7 323: 1-9. doi:10.1186/1756-0500-7-323

Author Portegijs, Erja
Iwarsson, Susanne
Rantakokko, Merja
Viljanen, Anne
Rantanen, Taina
Title Life-space mobility assessment in older people in Finland; measurement properties in winter and spring
Journal name BMC Research Notes   Check publisher's open access policy
ISSN 1756-0500
Publication date 2014-05-30
Sub-type Article (original research)
DOI 10.1186/1756-0500-7-323
Open Access Status DOI
Volume 7
Issue 323
Start page 1
End page 9
Total pages 9
Place of publication London, United Kingdom
Publisher BioMed Central
Collection year 2015
Language eng
Formatted abstract
Background Life-space mobility refers to the spatial area an individual moves through, the frequency and need for assistance. Based on the assumption that measurement scale properties are context-specific, we tested the scale distribution, responsiveness, and reproducibility of the 15-item University of Alabama at Birmingham Study of Aging Life-Space Assessment in older people in Finland, specifically accounting for season.

Methods Community-dwelling older men and women in central Finland aged 75-90 years were interviewed to determine life-space mobility (score range 0-120). Baseline (January-June 2012) and one-year follow-up data (January-June 2013; n = 806) from the cohort study “Life-space mobility in old age” were used to investigate the scale distribution and responsiveness over a period of one year. In addition, with a sub-sample in conjunction with the one-year follow-up, we collected data to study the two-week test-retest reproducibility (n = 18 winter and n = 21 spring 2013).

Results The median life-space mobility score at baseline was 64. The median change in score over the one-year follow-up was zero. However, participants reporting a decline in health (repeated measures ANOVA p = .016) or mobility (p = .002) status demonstrated a significantly larger decrease in life-space mobility score than those reporting no or positive changes over the year. The two-week intra-class correlation (ICC) coefficient was .72. Lower ICC was found in the winter than in the spring sample and for items that represent higher life-space levels.

Conclusions The test-retest reproducibility of the Life-Space Assessment was fair but somewhat compromised in the winter. Mobility of older people at the life-space levels of “town” and “beyond town” may be more variable. Life-space mobility was responsive to change, regardless of season. Further study is warranted to obtain insight in the factors contributing to seasonal effects.
Keyword Reliability
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Nursing, Midwifery and Social Work Publications
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Created: Thu, 26 Jun 2014, 10:03:44 EST by Vicki Percival on behalf of School of Nursing, Midwifery and Social Work