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Table 3 Internal consistency and test-retest reliability of the Ar-FJS

From: Psychometric properties of the Arabic version of the Forgotten Joint Score usage in total hip arthroplasty

Item

Mean ± SD

Item-total correlation

Alpha, if the item removed

ICC values

(95% CI)

SEM

MDC

1

47.43 ± 37.45

0.645

0.957

0.881 (0.810–0.925)

7.90

21.9

2

48.13 ± 40.44

0.678

0.956

0.691 (0.508–0.806)

20.29

56.24

3

52.34 ± 41.00

0.817

0.953

0.850 (0.760–0.906)

10.77

29.85

4

26.87 ± 37.26

0.662

0.957

0.749 (0.601–0.843)

15.41

42.71

5

40.19 ± 40.01

0.660

0.957

0.797 (0.676–0.873)

13.99

38.78

6

56.54 ± 40.10

0.833

0.952

0.828 (0.726–0.892)

11.92

33.04

7

55.14 ± 38.35

0.792

0.953

0.866 (0.787–0.916)

9.33

25.86

8

56.31 ± 39.17

0.797

0.953

0.846 (0.755–0.904)

10.32

28.61

9

59.81 ± 38.81

0.793

0.953

0.813 (0.702–0.883)

12.35

34.23

10

52.34 ± 39.99

0811

0.953

0.797 (0.675–0.873)

14.01

38.83

11

46.50 ± 37.37

0.871

0.951

0.876 (0.801–0.922)

8.49

23.53

12

49.07 ± 37.76

0.800

0.953

0.779 (0.647–0.861)

13.77

38.17

  1. Mean, item-total correlation and alpha if item removed are based on the initial testing (N=107)