Assessing mental capacity for everyday decision-making in the Chinese older population.

1. The abilities to make everyday decisions may be reliably measured in the local elderly population. 2. The Chinese version of the Assessment of Capacity for Everyday Decision-Making is a reliable tool to assess these abilities. 3. Significant proportion of participants with mild dementia was mentally incapable in making decisions on everyday tasks. Global cognitive functioning appeared to be an important prerequisite for intact mental capacity.