Buzby et al first reported the Nutritional Risk Index (NRI) which is used to identify malnourishment in elderly patients admitted to the hospital.
NOTE: There are several variations for the NRI.
(1) serum albumin in g/L
(2) present weight in kilograms
(3) usual weight in kilograms
= ((factor 1) * (serum albumin in g/L)) + ((factor 2) * (present weight) / (usual weight))
probably should be 1.59; the results of the assay were probably reported in g/dL
gives Roubenoff as source
gives Buzby as source
ratio reported as percent from 0 to 100 (or more); obtained by multiplying by 100%
0.417 * 100
similar to Buzby; includes the 100 but refers to ratio as a percent
uses the ratio of weights without making a percent
Form used in implementation:
= (1.519 * (serum albumin in g/L)) + (41.7 * (current weight in kg) / (usual weight in kg))
• The higher the index the less likely the patient is malnourished.
97.5 to 100
83.5 to 97.4
• While the NRI would work for many elderly patients it seems to be intended to detect a protein malnutrition rather than vitamin deficiency.
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Purpose: To evaluate an elderly patient for malnutrition using the Nutritional Risk Index (NRI), originally reported by Buzby et al.
Objective: risk factors
ICD-10: E40-E46, E50-E64,