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Table 1 Characteristics of included ACT-AM participants and summary statistics for the sPPF and activity pattern metrics

From: Associations between physical function and device-based measures of physical activity and sedentary behavior patterns in older adults: moving beyond moderate-to-vigorous intensity physical activity

 

All ages

Age 65–74

Age 75–84

Age 85+

N

%

N

%

N

%

N

%

Total

795

 

355

 

330

 

110

 

Age, mean (SD)

76.7 (6.8)

70.8 (2.3)

78.9 (2.9)

89.0 (3.6)

Female

434

55

188

53

181

55

65

59

Non-Hispanic white

720

91

329

93

293

89

98

89

Post-secondary education

730

92

339

95

304

92

87

79

Body mass index, mean (SD)

26.8 (4.7)

27.1 (5.1)

26.8 (4.4)

26.3 (4.3)

 < 25

307

39

141

40

124

38

42

38

 25- < 30

317

40

134

38

138

42

45

41

 30+

171

22

80

23

68

21

23

21

Osteoarthritis

172

22

72

20

74

22

26

24

Depressive symptoms (CES-D score ≥ 10)

68

9

26

7

31

9

11

10

Charlson comorbidity index

 0

470

59

246

69

185

56

39

35

 1

129

16

59

17

52

16

18

16

 2

99

12

31

9

47

14

21

19

 3+

97

12

19

5

46

14

32

29

Regular exercise (15 min ≥3 times/week)

641

81

299

84

265

80

77

70

Difficulty with ≥1 activities of daily living

144

18

39

11

73

22

32

29

Fair/Poor self-rated health

53

7

12

3

23

7

18

16

sPPFa, mean (SD)

8.3 (2.9)

9.4 (2.3)

8.4 (2.8)

6.5 (3.0)

sPPFa, median (quartile 1, quartile 3)

9 (7, 10)

10 (8, 11)

9 (7, 10)

7 (4, 9)

Activity pattern metricsa,b, mean (SD)

activPAL

 MBD, minutes

16.0 (8.0)

14.9 (7.8)

16.4 (7.8)

17.1 (8.6)

 Sitting hours

10.1 (1.9)

9.8 (1.9)

10.0 (2.0)

10.7 (1.8)

 Standing hours

4.0 (1.6)

4.1 (1.5)

4.1 (1.7)

3.8 (1.7)

 Step count

6453 (3474)

7803 (3774)

6259 (3103)

4460 (2398)

ActiGraph

 SA hours

9.6 (1.6)

9.2 (1.6)

9.6 (1.6)

10.4 (1.2)

 LPA hours

4.6 (1.2)

4.6 (1.2)

4.7 (1.3)

4.3 (1.1)

 MVPA hours

1.0 (0.7)

1.4 (0.7)

1.0 (0.7)

0.5 (0.4)

  1. Note. ACT-AM Adult Changes in Thought - Activity Monitoring sub-study, SD Standard deviation, CES-D Center for Epidemiologic Studies Depression Scale, sPPF Short Performance-based Physical Function score, MBD Mean sitting bout duration, SA Sedentary activity, LPA Light intensity physical activity, MVPA Moderate-to-vigorous intensity physical activity
  2. aSummary statistics for the sPPF and the device-based activity pattern metrics incorporate weighting to account for selection into the analytic sample
  3. bAverage daily measures from ActiGraph and activPAL are adjusted for awake wear time