Which of the following statements about MNA-SF accuracy is correct?

• A. MNA-SF has higher diagnostic accuracy than MNA
• B. MNA-SF has no correlation with MNA
• C. MNA-SF preserves high diagnostic accuracy relative to clinical nutrition status and high correlation with MNA
• D. MNA-SF cannot be used for screening

Answer: (C)

The key idea is that the MNA-SF is designed to be a brief screening tool that still mirrors the performance of the full MNA. It has been validated against the full MNA and against clinical nutrition status, showing preserved diagnostic accuracy and a strong correlation with the full MNA scores. This means it can reliably identify nutritional risk in a quick assessment, and those at risk can then undergo a more thorough evaluation if needed. It does not claim higher accuracy than the full MNA, there is indeed correlation with the full instrument, and it is intended for screening rather than being unusable for screening.