Objectives:
To describe aerobic physical activity among middle-aged and older
adults by their self-reported cognitive decline and their receipt of
informal care for declines in cognitive functioning and most common type of
physical activity.
Design:
Cross-sectional study using data from the 2011 Behavioral Risk Factor
Surveillance System.
Setting:
Landline and cellular telephone survey.
Participants:
93,082 respondents aged 45 years and older from 21 US states i in
2011.
Measurements:
Subjective cognitive decline (SCD) was defined as experiencing
confusion or memory loss that was happening more often or getting worse
during the past 12 months. Regular care was defined as always, usually, or
sometimes receiving care from family or friends because of SCD. Using the
2008 Physical Activity Guidelines for Americans, respondents were classified
as being inactive, insufficiently active, or sufficiently active based on
their reported aerobic exercise. We calculated weighted proportions and used
chi-square tests for differences across categories by SCD status and receipt
of care. We estimated the prevalence ratio (PR) for being inactive,
insufficiently active, and sufficiently active using separate log-binomial
regression models, adjusting for covariates.
Results:
12.3% of respondents reported SCD and 23.1% of those with SCD
received regular care. 29.6% (95%CI: 28.9–30.4) of respondents
without SCD were inactive compared to 37.1% (95%CI: 34.7–39.5) of
those with SCD who did not receive regular care and 50.2% (95%CI:
45.2–55.1) of those with SCD who received regular care. 52.4% (95%CI:
51.6–53.2) of respondents without SCD were sufficiently active
compared to 46.4% (95%CI: 43.8–49.0) of respondents with SCD and
received no regular care and 30.6% (95%CI: 26.1–35.6) of respondents
with SCD who received regular care. After adjusting for demographic and
health status differences, people receiving regular care for SCD had a
significantly lower prevalence of meeting aerobic guidelines compared to
people without SCD (PR=0.80, 95%CI: 0.69–0.93, p=0.005). The most
prevalent physical activity was walking for adults aged ≥ 45 years
old (41–52%) regardless of SCD status or receipt of care.
Conclusion:
Overall, the prevalence of inactivity was high, especially among
people with SCD. These findings suggest a need to increase activity among
middle-aged and older adults, particularly those with SCD who receive care.
Examining ways to increase walking, potentially by involving informal
caregivers, could be a promising way for people with SCD to reduce
inactivity and gain the health benefits associated with meeting physical
activity guidelines.