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Table 4 Internal consistency of the T-FIHOA

From: Cross-cultural adaptation and validation of the Thai version of the functional index for hand osteoarthritis (FIHOA)

Items

Mean (SD)

Scale mean if

Item is deleted

Scale variance if item is deleted

Adjusted total item Correlation Spearman’s rhoa

Cronbach’s alpha if item is deletedb

Item 1

0.48 (0.66)

4.1

16

0.83

0.92

Item 2

0.64 (0.69)

4.0

15.21

0.87

0.92

Item 3

0.62 (0.73)

3.9

15.21

0.81

0.92

Item 4

0.71 (0.80)

3.9

16

0.77

0.92

Item 5

0.64 (0.64)

4

16.81

0.64

0.93

Item 6

0.61 (0.73)

3.9

15.21

0.79

0.92

Item 7

0.75 (0.74)

3.9

15.21

0.75

0.92

Item 8

0.40 (0.60)

4.1

16.81

0.75

0.92

Item 9

0.86 (0.80)

3.7

16

0.60

0.93

Item 10

0.28 (0.55)

4.3

18.49

0.62

0.93

  1. T-FIHOA the Thailand version of the Functional Index of Hand Osteoarthritis
  2. Values are given as mean ± standard deviation or range
  3. aSpearman’s rho indicates Spearman’s correlation coefficient
  4. bOverall Cronbach’s alpha values for all 10 items are 0.93