Table 5 Cross-sectional intraobserver reproducibility of joint space width measurements at baseline

1

2.33 ± 0.81

2.34 ± 1.07

-0.01 ± -0.24

-0.49 to +0.47

0.96 (0.93–0.98), 0.99

2

2.67 ± 0.81

2.66 ± 1.02

-0.02 ± 0.16

-0.30 to +0.34

(0.98–0.99) 0.98 (0.97–0.99)

Mean (1 + 2)

2.50 ± 0.91

2.50 ± 0.89

0.004 ± 0.14

-0.28 to +0.28

1

2.41 ± 0.86

2.40 ± 0.86

0.01 ± 0.25

-0.49 to +0.51

0.96 (0.93–0.98), 0.99

2

2.69 ± 1.05

2.68 ± 1.01

0.01 ± 0.15

-0.29 to +0.31

(0.98–0.99) 0.98 (0.97–0.99)

Mean (1 + 2)

2.55 ± 0.94

2.54 ± 0.92

0.01 ± 0.16

-0.30 to +0.32

1

2.37 ± 0.79

2.29 ± 0.78

0.08 ± 0.37

-0.89 to +0.71

0.88 (0.80–0.93), 0.98

2

2.69 ± 0.78

2.70 ± 1.01

-0.02 ± 0.21

-0.41 to +0.51

(0.96–0.99) 0.96 (0.94–0.98)

Mean (1 + 2)

2.53 ± 0.85

2.50 ± 0.87

0.03 ± 0.21

-0.29 to +0.35