In the context of cognitive impairment, what does an association mean?

• A. Two impairments co-occur in the same patient
• B. Two impairments appear in different patients
• C. Only one impairment is present on all tasks
• D. There is no impairment observed

Answer: (A)

In cognitive impairment, an association means that two impairments occur together within the same person. When you observe deficits in, say, memory and language in one patient, those impairments are associated because they co-occur in that individual, suggesting a linked pattern or shared impact on brain networks. This is different from seeing two impairments across different patients, which would reflect a broader pattern rather than an association within a single person. It’s also not about a single impairment present on all tasks (that would be a single-domain deficit) or about no impairment at all. So co-occurrence of two deficits in the same patient best captures what an association refers to.