Table 2 Item-deleted Cronbach’s alpha, corrected item-total correlation and response trend for each item in the SC-SFI
From: Cross-cultural validation of simplified Chinese version of spine functional index
|  | Item-deleted Cronbach’s Alpha | Corrected item-total correlation | Z-skewness |
|---|---|---|---|
Item 1 | 0.91 | 0.45 | 0.19 |
Item 2 | 0.91 | 0.41 | 0.14 |
Item 3 | 0.90 | 0.65 | 0.92 |
Item 4 | 0.91 | 0.42 | 0.53 |
Item 5 | 0.90 | 0.58 | 0.24 |
Item 6 | 0.91 | 0.33 | 0.07 |
Item 7 | 0.91 | 0.47 | 1.02 |
Item 8 | 0.91 | 0.33 | −0.76 |
Item 9 | 0.90 | 0.51 | 0.36 |
Item 10 | 0.90 | 0.69 | 0.52 |
Item 11 | 0.90 | 0.66 | 0.61 |
Item 12 | 0.91 | 0.31 | 0.17 |
Item 13 | 0.90 | 0.51 | 1.58 |
Item 14 | 0.90 | 0.54 | 0.68 |
Item 15 | 0.91 | 0.44 | 0.57 |
Item 16 | 0.91 | 0.38 | 0.07 |
Item 17 | 0.90 | 0.48 | 0.97 |
Item 18 | 0.91 | 0.43 | 1.60 |
Item 19 | 0.91 | 0.47 | 1.17 |
Item 20 | 0.90 | 0.58 | 0.06 |
Item 21 | 0.90 | 0.61 | 0.63 |
Item 22 | 0.90 | 0.66 | 0.84 |
Item 23 | 0.90 | 0.62 | 0.68 |
Item 24 | 0.90 | 0.51 | 0.31 |
Item 25 | 0.90 | 0.56 | 0.98 |