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a University of California at Los Angeles School of Medicine
b VA Greater Los Angeles Healthcare System, Geriatric Research, Education, and Clinical Center, Sepulveda, California
c Programe Vida Als Anys, Servei Català de la Salut, Barcelona, Spain
d Nestlé Research Center, Lausanne, Switzerland
e Service de Médicine Interne et Gérontologique Clinique, Hôpitaux de Toulouse, France
Laurence Z. Rubenstein, Director GRECC (11E) VA Greater Los Angeles Healthcare System, 16111 Plummer St., Sepulveda, CA 91343 E-mail: lzrubens{at}ucla.edu.
Decision Editor: John E. Morley, MB, BCh
Background. The Mini-Nutritional Assessment (MNA) is a validated assessment instrument for nutritional problems, but its length limits its usefulness for screening. We sought to develop a screening version of this instrument, the MNA-SF, that retains good diagnostic accuracy.
Methods. We reanalyzed data from France that were used to develop the original MNA and combined these with data collected in Spain and New Mexico. Of the 881 subjects with complete MNA data, 151 were from France, 400 were from Spain, and 330 were from New Mexico. Independent ratings of clinical nutritional status were available for 142 of the French subjects. Overall, 73.8% were community dwelling, and mean age was 76.4 years. Items were chosen for the MNA-SF on the basis of item correlation with the total MNA score and with clinical nutritional status, internal consistency, reliability, completeness, and ease of administration.
Results. After testing multiple versions, we identified an optimal six-item MNA-SF total score ranging from 0 to 14. The cut-point score for MNA-SF was calculated using clinical nutritional status as the gold standard (n = 142) and using the total MNA score (n = 881). The MNA-SF was strongly correlated with the total MNA score (r = .945). Using an MNA-SF score of 
11 as normal, sensitivity was 97.9%, specificity was 100%, and diagnostic accuracy was 98.7% for predicting undernutrition.
Conclusions. The MNA-SF can identify persons with undernutrition and can be used in a two-step screening process in which persons, identified as "at risk" on the MNA-SF, would receive additional assessment to confirm the diagnosis and plan interventions.
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