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Objective:  There have been attempts to modify the Montreal Cognitive Assessment (MoCA), a brief cognitive screening tool, for use across several Asian countries, but evidence to support the utility of these translations has been limited, particularly for the Vietnamese translation of the MoCA (MoCA-V). This two-part study aimed to evaluate the MoCA-V in a Vietnamese sample.  Methods:  In the first stage, we examined the relationships between the MoCA-V subscales and common neuropsychological tests among healthy Vietnamese adults ( n  = 129) and individuals with moderate-to-severe traumatic brain injury ( n  = 80). In the second stage, we explored the relationship of TBI status (TBI vs non-TBI) and demographic variables to MoCA-V performance and investigated the optimal cut-off score of the MoCA-V using the two samples combined.  Results:  The MoCA-V Attention, Language, and Executive Function subscales were correlated with the Digit Span Test, Verbal Fluency Test, and Trail Making Test, respectively, across healthy participants and participants with TBI. Global performance on the MoCA-V was predicted by TBI status, education, and age. Our ROC analysis revealed that a cut-off score of 22 offered the best sensitivity (76.3%) and specificity (71.3%) trade-off for identifying cognitive impairment as measured by the MoCA-V.  Conclusions:  In addition to identifying a cut-off score for cognitive screening, the findings provide support for the validity of the examined MoCA-V subscales and for the MoCA-V’s ability to distinguish TBI survivors vs controls. These results may pave the way for larger-scale investigations of the MoCA-V and for the development of more neuropsychological batteries in Vietnamese.

Examining the Vietnamese Montreal cognitive assessment in healthy and moderate-to-severe traumatic brain injury populations