Table 1 Baseline characteristics of RA vs. non-RA groups

Age, years (%)

< 0.001

< 60

71.90

74.50

39.76

≥60

28.10

25.50

60.24

Sex (%)

< 0.001

Male

52.72

53.57

42.17

Female

47.28

46.43

57.83

Race (%)

< 0.001

Mexican American

22.53

22.89

18.07

Other Hispanic

6.00

6.14

4.30

Non-Hispanic White

46.79

46.83

46.30

Non-Hispanic Black

20.83

20.23

28.23

Other

3.84

3.90

3.10

Marital status (%)

< 0.001

Married or with partner

62.21

62.90

53.75

Single

37.79

37.10

46.25

Education level (%)

< 0.001

Less than high school

29.68

28.71

41.65

High school or GED

23.43

23.23

25.99

Above high school

46.89

48.07

32.36

BMI (%)

< 0.001

Normal weight

33.87

34.81

22.06

Overweight

35.32

35.43

33.99

Obese

30.81

29.76

43.95

Vigorous activity (%)

< 0.001

Yes

30.55

31.48

18.11

No

69.45

68.52

81.89

Moderate activity (%)

0.001

Yes

47.30

47.81

40.66

No

52.70

52.19

59.34

Hypertension (%)

< 0.001

Yes

28.42

26.22

55.44

No

71.58

73.78

44.56

Diabetes

< 0.001

Yes

7.83

6.95

18.77

No

92.17

93.05

81.23

Smoker status

< 0.001

Current

23.02

22.76

26.16

Former

24.23

23.61

31.84

Never

52.76

53.63

42.00

Alcohol use

0.073

Yes

17.07

16.82

20.04

No

82.93

83.18

79.96

Steroid use

< 0.001

Yes

1.05

0.74

4.90

No

98.95

99.26

95.10

Statin use

< 0.001

Yes

10.93

9.81

25.00

No

89.07

90.19

75.00

PIR

< 0.001

< 1

17.27

17.01

20.49

1–3

41.82

41.20

49.62

≥ 3

40.92

41.80

29.89

CRP (mg/dL)

0.44 ± 0.86

0.42 ± 0.81

0.73 ± 1.31

< 0.001

TC (mmol/L)

5.09 ± 1.05

5.08 ± 1.05

5.17 ± 1.04

0.016

HDL-C (mmol/L)

1.37 ± 0.40

1.37 ± 0.40

1.38 ± 0.45

0.677

LDL-C (mmol/L)

3.06 ± 0.93

3.06 ± 0.93

3.05 ± 0.94

0.960

RC (mmol/L)

0.66 ± 0.35

0.65 ± 0.35

0.74 ± 0.38

< 0.001