Ranhoff A H, Gjøen A U, Mowé M
Research Group in Geriatric Medicine, University of Oslo, Norway.
J Nutr Health Aging. 2005 Jul-Aug;9(4):221-5.
Malnutrition is often over-seen in elderly acute medical patients. It is a need for a simple and robust screening tool.
The aim was to evaluate, with regard to validity, the Mini Nutritional Assessment-Short Form (MNA-SF) as a screening tool for malnutrition in elderly acute medical patients.
This is an observational study where a nurse's scoring of MNA-SF is compared to comprehensive assessment by a clinical nutritionist (gold standard). Sixty-nine patients aged 70 years and older and admitted to a general medical department in year 2000 and 2001 were included.
The mean MNA-SF score was 7.8 (SD +/- 2.88, range 2 to 12). Fifty-one patients (74%) scored positive for malnutrition or risk of malnutrition (MNA-SF < 11), whereas only 21 (30%) were scored to have malnutrition by the nutritionist. Sensitivity of the MNA-SF was 1.0 and specificity 0.38, giving 0.57 correctly classified subjects. Best subset logistic regression showed BMI < 23 to be the only item explaining the gold standard. When using BMI < 23, 32 (46%) subjects screened positive for malnutrition (sensitivity 0.86, specificity 0.71), giving 0.75 correctly classified subjects.
When screening elderly acute medical patients in general wards for malnutrition or risk of malnutrition, the MNA-SF have a high sensitivity and can be useful. The sole use of BMI < 23 may be equally effective, but will give no information leading towards an explanation. We recommend that a score of BM < 23 should be followed by MNA-SF when the aim is to identify poor nutritional status in elderly acute medical patients.
营养不良在老年急性内科患者中常常被忽视。需要一种简单且可靠的筛查工具。
旨在评估简易营养评估量表简表（MNA-SF）作为老年急性内科患者营养不良筛查工具的有效性。
这是一项观察性研究，将护士对MNA-SF的评分与临床营养师的综合评估（金标准）进行比较。纳入了2000年和2001年入住综合内科的69名70岁及以上患者。
MNA-SF的平均得分为7.8（标准差±2.88，范围2至12）。51名患者（74%）营养不良或有营养不良风险的评分呈阳性（MNA-SF<11），而营养师评定只有21名（30%）有营养不良。MNA-SF的敏感性为1.0，特异性为0.38，正确分类的受试者为0.57。最佳子集逻辑回归显示BMI<23是唯一能解释金标准的项目。当使用BMI<23时，32名（46%）受试者营养不良筛查呈阳性（敏感性0.86，特异性0.71），正确分类的受试者为0.75。
在普通病房筛查老年急性内科患者的营养不良或营养不良风险时，MNA-SF具有较高的敏感性且可能有用。仅使用BMI<23可能同样有效，但无法提供解释依据。当旨在识别老年急性内科患者的营养状况不佳时，我们建议在BMI<23后采用MNA-SF进行评估。
