Fig 1.
The flow chart to administer aphasia scales in acute and non-acute stroke patients.
Fig 2.
Schematic representation of validation process of Chinese version of the Language Screening Test (CLAST).
Please note that the floor and ceiling effects were assessed in aphasia group, and discrimination validity was assessed in the non-acute group.
Table 1.
Baseline data of all patients, including the educational level of all patients(n = 261) and lesion sites of the non-acute patients(n = 107).
Table 2.
Factor loading details of the 14 items with each version of CLAST.
Rotated component matrix using the Generalized Least Squares analysis, limited the number of extracted factor to 1 in each version and Oblique rotations (n = 261).
Fig 3.
Box plot representing the total scores of the Chinese version of the Language Screening Test (CLAST-a/CLAST-b) in terms of educational levels.
The maximum and the lower quartile of CLAST score were found to be identical.
Fig 4.
Receiver operating characteristic (ROC) curve of the Chinese version of the Language Screening Test (CLAST) in comparison with the Western Aphasia Battery (WAB) used for external validation.
The blue, green, and red curves respectively represent CLAST-a, CLAST-b, add CLAST-a and CLAST-b combined. (A) In higher-level education group, at the point where CLAST-a score or CLAST-b score <14, specificity was 0.878 or 0.902 and sensitivity was 0.972 or 0.944. At the point where the combined score of CLAST-a and CLAST-b <27, the specificity was 0.902 and sensitivity was 0.944. (B) In lower-level education group, at the point where CLAST-a score or CLAST-b score <13, specificity of both (CLAST-a and CLAST-b) was 1 and sensitivity of both was 0.944. At the point where the combined score of CLAST-a and CLAST-b <26, both specificity and sensitivity were 1.
Fig 5.
Scatter diagram between Aphasia quotient (AQ) of the Western Aphasia Battery (WAB) and total scores of the Chinese version of the Language Screening Test (CLAST-a/CLAST-b).
The correlation between AQ of WAB and total score of CLAST-a/CLAST-b is represented by blue circles and green circles, respectively.
Fig 6.
Histographic representation of the correlation between the Chinese version of the (CLAST) subtests and corresponding Western Aphasia Battery (WAB) items.
The CLAST-a and CLAST-b are indicated by white and black bars, respectively. The coefficient of correlation between the CLAST and WAB ranged from 0.68 to 0.885 (p<0.01).