Table 3 Correlation between RAPID3 and the categories of composite disease activity indices (CDAI, SDAI e DAS28)

CDAI

Remission

8

9

4

6

27

Low

4

1

9

16

30

Moderate

2

0

9

33

44

High

0

0

2

26

28

Total

14

10

24

81

129

Kappa 0.132 (95%CI = 0.04–0.21)

Linear weighted kappa = 0.29 (95%CI = 0.19–0.39)

Quadratic weighted kappa = 0.43 (95%CI = 0.31–0.54)

SDAI

Remission

9

9

4

5

27

Low

3

1

8

16

28

Moderate

2

8

10

38

24

High

0

16

2

20

79

Total

14

10

24

79

127

Kappa 0.118 (95%CI = 0.03–0.20)

Linear weighted kappa = 0.28 (95%CI = 0.19–0.38)

Quadratic weighted kappa = 0.43 (95%CI = 0.31–0.55)

DAS28 (ESR)

Remission

8

9

6

10

33

Low

4

1

3

4

12

Moderate

2

0

12

38

52

High

0

0

3

28

31

Total

14

10

24

80

128

Kappa 0.162 (95%CI = 0.06–0.25)

Linear weighted kappa = 0.32 (95%CI = 0.22–0.42)

Quadratic weighted kappa = 0.44 (95%CI = 0.32–0.56)