Association Between Life Space and Risk of Mortality in Advanced Age

作者：Boyle Patricia A^*; Buchman Aron S; Barnes Lisa L; James Bryan D; Bennett David A

来源：Journal of the American Geriatrics Society, 2010, 58(10): 1925-1930.

DOI：10.1111/j.1532-5415.2010.03058.x

• life space
• functional status
• death
• daily living
• disability

OBJECTIVES
To examine the association between life space, a measure of functional status that describes the range of movement through the environment covered during daily functioning, and the risk of mortality in older community-based persons.
DESIGN
Two ongoing, prospective observational cohort studies of aging.
SETTING
Greater metropolitan Chicago area.
PARTICIPANTS
One thousand four hundred forty-five community-based older persons without dementia.
MEASUREMENTS
Life space was measured at baseline using a series of questions designed to measure the extent of participants' movement throughout their environment, ranging from the bedroom to out of town. The association between life space and mortality was examined using proportional hazards models adjusted for age, sex, race, and education.
RESULTS
Over up to 8 years of follow-up (mean 4.1 years), 329 of 1,445 (22.8%) participants died. In a proportional hazards model adjusted for age, sex, race, and education, a more-constricted life space was associated with a greater risk of death (hazard ratio=1.18, 95% confidence interval=1.09-1.27, P <.001), such that people with life spaces constricted to their immediate home environment (score=3) were approximately 1.6 times as likely to die as those whose life spaces included trips out of town (score=0). This association persisted after the addition of terms for several potential confounders, including physical activity, performance-based physical function, disability, depressive symptoms, social networks, body mass index, and number of chronic medical conditions.
CONCLUSION
Constricted life space is associated with greater risk of death in older community-based persons.

• 出版日期2010-10