objective data and subjective data

No, revisit the definition of objective data (and then compare it to subjective). In gathering objective data for this situation, it would only be what you observe (i.e. she has difficulty or is resistant to giving a return demo on what she was taught re: his care, she appears physically frazzled and disorganized, was late to plan of care meetings with staff, used excuses not to learn, appears physically too fragile to provide appropriate care, etc.). His Med Dx has nothing to do with data at all.