Mini Nutritional Assessment (MNA)
Mini Nutritional Assessment · Also known as: MNA, MNA-SF (short form)
The Mini Nutritional Assessment is a simple, rapid, and non-invasive screening tool designed to identify malnutrition and nutritional risk in older adults. Developed by Guigoz, Vellas, and colleagues in 1994, it combines subjective assessment with objective anthropometric and laboratory measurements. It is widely used in clinical practice, research, and community settings to detect nutritional decline and guide intervention.
Read the full method
Sign in with a free account to read this section.
Method map
The neighbourhood of related methods — select a node to explore.
When to use it
The MNA is indicated for all older adults aged 65 and above, particularly those in primary care, geriatric clinics, hospitals, nursing homes, rehabilitation facilities, and community care settings. It is especially valuable for screening older people with acute illness, those who have experienced recent weight loss, those with restricted mobility, those taking multiple medications, and those living alone or in socially isolated conditions. It is not suitable for younger populations. The MNA can be administered at baseline (e.g., on admission) and repeated periodically (e.g., quarterly or annually) to track nutritional status over time.
Strengths & limitations
- Rapid and practical—can be completed in 5–15 minutes with minimal equipment, making it feasible in busy clinical environments.
- Integrates subjective, objective, and anthropometric data—provides holistic assessment rather than relying on single indicators.
- Validated internationally—extensively used in over 50 countries with demonstrated reliability and predictive validity across diverse populations.
- Predicts clinical outcomes—scores correlate with morbidity, mortality, hospitalization, and length of stay in older adults.
- Includes a short-form (MNA-SF)—allows rapid screening with option to proceed to full assessment if risk is detected.
- Non-invasive—requires only simple body measurements and interview; no blood tests or complex procedures needed for initial screening.
- Subjective elements—responses to questions about food intake and appetite rely on patient recall and may be inaccurate in cognitively impaired individuals.
- Requires trained administration—accurate anthropometric measurement (especially calf and mid-arm circumference) requires trained personnel; technique errors can affect scoring.
- Limited in severe cognitive impairment—patients with dementia or delirium may not reliably answer subjective questions; proxy respondents may not have accurate dietary information.
- Regional variations—cut-off thresholds may vary slightly across populations (e.g., different ethnic groups, geographic regions); local validation recommended.
- Does not diagnose specific deficiencies—identifies overall nutritional risk but does not measure individual micronutrient status (iron, B12, folate, etc.); biochemical testing is needed for that.
- Calf circumference limitations—in patients with significant edema, lymphedema, or amputations, calf measurement may be impossible or misleading.
Frequently asked
What is the difference between the full MNA (18 items) and the MNA-SF (6 items)?
The MNA-SF is a screening tool that asks 6 key questions to rapidly identify nutritional risk. If MNA-SF score is ≤11, the full 18-item MNA is administered to yield a detailed assessment. MNA-SF is used in busy settings; full MNA is used when risk is detected or when detailed evaluation is needed. Both are valid but serve different purposes.
Can the MNA be used in younger adults?
The MNA was developed and validated specifically for older adults aged 65 and above. Its relevance to younger populations is unclear, and different cutoff thresholds may be needed. Other nutritional screening tools (e.g., Nutrition Risk Screening 2002 for broader ages) are recommended for younger patients.
What does a score of 20 mean, and what should be done?
A score of 20 falls in the 'at risk' category (17–23.5). This indicates the patient is not yet malnourished but is at significant risk. Recommended actions include dietary counseling, assessment of barriers to food intake (e.g., dentures, medications), evaluation for depression or cognitive impairment, and possible nutritional supplementation. Repeat MNA-SF in 3 months to monitor progress.
How often should the MNA be repeated?
Recommendations vary by setting. In acute hospital settings, MNA is typically administered at admission and reassessed before discharge. In long-term care, MNA-SF is often performed quarterly or at significant change in clinical status. In community-dwelling older adults, annual screening is reasonable unless risk is detected, in which case more frequent assessment (e.g., 3-monthly) is warranted.
Can a proxy (caregiver) complete the MNA if the patient has dementia?
Partial proxy completion is possible for factual items (e.g., living situation, medications) but dietary recall and subjective items (appetite, self-perception) are less reliable from proxy respondents. Ideally, a trained assessor who knows the patient well conducts the interview, combining direct observation with carer input. In severe dementia, clinical judgment alongside MNA score is essential.
Is the MNA affected by body composition changes in older adults?
Yes. Older adults often experience sarcopenia (muscle loss) alongside weight stability, so BMI and weight alone may mask poor nutritional status. The MNA's inclusion of calf and mid-arm circumferences helps address this, as calf circumference reflects muscle mass. However, in patients with significant visceral fat or sarcopenic obesity, clinical correlation is important.
Sources
- Guigoz, Y., Vellas, B., & Garry, P. J. (1994). Mini Nutritional Assessment: A practical assessment tool for grading the nutritional state of elderly patients. Facts and Research in Gerontology, Supplement 2, 15-59. link ↗
- Vellas, B., Villars, H., Abellan, G., et al. (2006). Overview of the MNA-Its history and challenges. The Journal of Nutrition, Health & Aging, 10(6), 456-465. link ↗
How to cite this page
ScholarGate. (2026, June 3). Mini Nutritional Assessment. ScholarGate. https://scholargate.app/en/nutritional-science/mini-nutritional-assessment
Which method?
Set this method beside its closest kin and read them side by side — the library lays the books on the table; the choice is yours.
- BWISNutritional Science↔ compare
- DASESNutritional Science↔ compare
- DQI-INutritional Science↔ compare
- FFQNutritional Science↔ compare
- MEDASNutritional Science↔ compare