A nurse is reviewing documentation for four older adult clients recently admitted to a skilled nursing facility. Which client should the nurse identify as having the highest immediate risk for fall-related injury?

A 78-year-old with bilateral cataracts and corrected hearing loss

An 86-year-old recovering from pneumonia who ambulates with standby assistance

A 74-year-old with stage 1 Parkinson's disease and stable vital signs

An 81-year-old who uses a walker, takes warfarin, and has a history of falls