Social capital predicts accelerometry-measured physical activity among older adults in the U.S.: a cross-sectional study in the National Social Life, Health, and Aging Project

Table 1 Descriptive statistics (n = 673)

Variable	Mean (SD) or %
Physical Activity
Mean Daily Counts (counts/minute)	222.9 (88.6)
Accelerometer Wear
Mean Wear Time (hours)	36.3 (7.9)
Participants Wearing Accelerometer over 1 Weekend Day (%)	18.4%
Participants Wearing Accelerometer over 2 Weekend Days (%)	22.1%
Demographics
Mean Age (years)	71.9 (7.2)
Female (%)	54%
Education (%)
< High School	13.6%
High School/GED	24.8%
Some College/Vocational	37.7%
Bachelors or More	23.9%
Race/Ethnicity (%)
White/Caucasian	83.9%
Black/African-American	6.4%
Hispanic (Non-Black)	6.2%
Other	3.5%
Married/Living with a Partner (%)	62.9%
Net Worth (%)
< $10 k	5.6%
$10 k-$49 k	9.6%
$50 k-$99 k	10.1%
$100 k-$499 k	39.2%
$500 k+	27.2%
Unreported	8.3%
Currently Working (%)	24.8%
Comorbidities
Modified Charlson Comorbidity Index^a	0.98 (1.33)
Body Mass Index (%)
Underweight or Normal (BMI 18–24)	25.3%
Overweight (BMI 25–30)	35.4%
Obese (BMI ≥30)	39.3%
Functional Health
Difficulty Performing ≥1 ADL^b (%)	31%
Difficulty Performing ≥1 IADL^c (%)	38.9%
Slow Gait^d (%)	28.7%
Weakness^d (%)	28.5%
Mental and Cognitive Health
Montreal Cognitive Assessment – Survey Adapted^e	23.3 (3.9)
Modified CES-Depression Survey^f	15.1 (3.9)
Self-Rated Health Status
Poor/Fair Physical Health (%)	19.8%

Abbreviations: SD Standard deviation, BMI Body mass index, ADL Activities of daily living, IADL Instrumental activities of daily living, CES Center for epidemiological studies
^aModified Charlson Comorbidity Index (CCI) provides a summative level of comorbidities for each respondent. Survey modified CCI has a range 0–14 and scoring includes any heart condition, stroke, diabetes, cancer not including skin, metastatic cancer, emphysema, asthma, chronic bronchitis or COPD, Alzheimer’s disease, dementia
^bActivities of Daily Living include walking one block, dressing, walking across a room, transferring in/out of bed, toileting, bathing, and eating
^cInstrumental Activities of Daily Living include using the telephone, driving at night, driving during the day, light housework, shopping for food, meal preparation, managing money, and taking medications
^dSlow Gait was defined as taking ≥5.7 s to complete a 3-m timed walk (the faster of two attempts used). Weakness was defined as taking ≥16.7 s to complete 5 repeated chair stands. Wheelchair-bound participants and those who could not complete the task safely were also considered ‘slow’and ‘weak’
^eMontreal Cognitive Assessment (MoCA) values (range 0–30) were estimated from an 18-item survey adaptation of the MoCA developed for NSHAP Wave 2
^fModified Center for Epidemiological Studies-Depression survey, measured by 11 separate items with range of 0 to 33

ISSN: 1471-2458