Life-Space mobility and clinical outcomes in COPD

Area of Science:

• Pulmonary Medicine
• Geriatrics
• Social Determinants of Health

Background:

• Social isolation is prevalent in Chronic Obstructive Pulmonary Disease (COPD) patients but is not adequately measured by current patient-reported outcomes.
• The association between social isolation and clinical outcomes in COPD remains largely unknown.

Purpose of the Study:

• To investigate the association between Life-Space mobility, a marker of social isolation, and clinical outcomes in adults with stable COPD.
• To determine if restricted Life-Space mobility predicts severe exacerbations and is linked to exercise tolerance, dyspnea, quality of life, and depressive symptoms.

Main Methods:

• Prospective enrollment of stable COPD adults.
• Assessment using the University of Alabama at Birmingham Life Space Assessment (LSA), six-minute walk test (6MWT), and other validated questionnaires.
• Recording of severe exacerbations (ER visits or hospitalizations) for up to one year post-enrollment.
• Regression analyses to determine associations between Life-Space mobility and clinical outcomes.

Main Results:

• 46% of participants (n=50) exhibited restricted Life-Space mobility (LSA score ≤60).
• Restricted Life-Space mobility was associated with a 4.65-fold increased risk of severe exacerbations after adjusting for key clinical factors (IRR 4.65, P=0.03).
• LSA scores correlated significantly with 6MWD (R=0.50, P<0.001), dyspnea (R=-0.58, P<0.001), quality of life (R=-0.34, P=0.02), and depressive symptoms (R=-0.39, P=0.005).

Conclusions:

• Restricted Life-Space mobility is a significant predictor of severe exacerbations in COPD patients.
• Reduced Life-Space mobility is strongly associated with diminished exercise tolerance, increased dyspnea, poorer quality of life, and heightened depressive symptoms in COPD.
• The Life Space Assessment (LSA) offers a valuable tool for identifying social isolation and its impact on clinical outcomes in COPD management.