Article

The independent contribution of physical inactivity to disability in
obstructive lung disease (OLD) is difficult to study, partly because inactivity
may reflect disease severity. We examined the relationship of physical inactivity
to disability progression over a 1-year period among a group of older adults with
OLD. METHODS: : A population-based cohort with self-reported physician-diagnosed
emphysema, chronic obstructive pulmonary disease, or chronic bronchitis (n = 206)
completed baseline interviews and in-person spirometry, with 1-year followup
interviews. The Community Health Activities Model Program for Seniors physical
activity questionnaire provided estimates of energy expenditure; we defined
inactivity as no expenditure in moderate- or vigorous-intensity activities.
Disability was measured with the Valued Life Activity (VLA) disability scale;
increased disability was defined as a 10% or greater increase in VLA disability
score over 1-year followup. Logistic regression tested the relationship between
baseline inactivity and disability increase, controlling for age, sex, baseline
VLA disability, comorbidities, smoking, and pulmonary function (forced expiratory
volume in 1 second, % predicted). RESULTS: : Of 206 subjects, 48 (27%) were
physically inactive at baseline; 42.9% of individuals whose disability increased
were inactive at baseline compared with 23.4% of those who did not experience a
disability increase. With adjustment for covariates, increased disability after 1
year was significantly (P = .04) more likely among individuals who were inactive
at baseline (Odds Ratio =2.4; 95% confidence interval, 1.02-5.9). CONCLUSIONS: :
Physically inactive individuals with OLD had more than double the odds of an
increase in disability, even after controlling for baseline disability, lung
function, and other covariates. These results provide strong support for the
importance of maintaining physical activity among individuals with OLD.

Langue : ANGLAIS

Tiré à part : OUI