Table 1 Sample characteristics of U.S. adults with self-reported arthritis or joint pain (sample = 3791; population = 311,125,758)

 Any limitations

62.86

18.18

 IADL

9.16

1.80

 ADL

5.68

1.03

 Walk limitations

39.01

6.12

Mean total expenditure ± SD

$10,587 ± $504

$3813 ± $119

  18–24

0.77

15.36

  25–44

11.54

39.19

  45–64

45.85

32.72

  65+

41.85

12.72

  Non-Hispanic white

75.64

64.76

  Non-Hispanic black

11.66

11.42

  Non-Hispanic other

4.77

7.58

  Hispanic

7.93

16.24

  Male

36.86

50.49

  Female

63.14

49.51

  Northeast

18.29

18.28

  Midwest

23.24

21.07

  South

38.48

36.75

  West

19.99

23.91

  Rural

19.17

14.72

  Urban

80.83

85.28

   < $25,000

48.59

42.88

  $25,000–$49,999

29.33

29.80

  $50,000-$74,999

12.38

14.70

   > $75,000

9.70

12.62

  Not employed

58.05

28.73

  Employed

41.95

71.27

  Less than high school

17.34

14.66

  High school

31.44

27.70

  College

40.87

45.59

  Graduate school

10.35

12.05

  Any private

63.09

68.99

  Public only

30.46

14.67

  No insurance

6.45

16.35

  Never married

10.48

31.04

  Separated/divorced/widowed

35.30

16.61

  Married

54.22

52.34

 Asthma

15.21

7.80

 Diabetes

20.11

7.19

 Emphysema

7.12

1.21

 High blood pressure

63.28

26.05

 High cholesterol

55.75

25.01

 Stroke

9.89

2.14

 Depression

17.32

6.98

 CVD

32.32

9.91

  Underweight

1.45

1.96

  Normal

23.80

37.05

  Overweight

32.17

34.29

  Obese

42.58

26.70