Final answer:
The most appropriate objective assessment tool for this patient would be the Berg Balance Scale. It is specifically designed to assess balance and fall risk in older adults.
Step-by-step explanation:
The most appropriate objective assessment tool for this patient would be the Berg Balance Scale. The Berg Balance Scale is specifically designed to assess balance and fall risk in older adults. It includes a variety of tasks that evaluate balance, such as sit-to-stand from different surfaces, transfers, and walking. Considering the patient's history of falls and the specific concerns raised by the patient's wife, the Berg Balance Scale would provide valuable information to determine the patient's fall risk and guide treatment planning.