Table 2.
Intraclass correlation coefficient (ICC) of freezing of gait questionnaire, Chinese language version (FOGQ-CH).
| Index | I-CVI (n = 5) | ICC (95% CI, n = 31) |
|---|---|---|
| Item 1 | 1.000 | 0.848 (0.710–0.924) |
| Item 2 | 0.800 | 0.710 (0.479–0.849) |
| Item 3 | 1.000 | 0.648 (0.440–0.834) |
| Item 4 | 1.000 | 0.679 (0.433–0.831) |
| Item 5 | 1.000 | 0.700 (0.467–0.842) |
| Item 6 | 1.000 | 0.469 (0.153–0.700) |
| S-CVI | 0.967 | |
| Total score | 0.786 (0.578–0.894) |
ICC, Intraclass Correlation Coefficient; FOGQ-CH, Freezing of Gait Questionnaire, Chinese-language version; I-CVI, Item-Content Validity Index; S-CVI, Scale-Content Validity Index; CI, Confidence Interval.