The prognostic nutritional index (PNI) is a measure of the risk that a patient has of developing a complication such as sepsis or death related to malnutrition.
Parameters:
(1) serum albumin in g/dL
(2) triceps skinfold in mm
(3) serum transferrin in mg/dL
(4) DH value
PNI (percent) =
= 158 - (16.6 * albumin in g/dL) - (0.78 * (triceps skinfold in mm)) - (0.20 * (serum transferrin in mg/dL)) - (5.8 * (DH value))
where:
• DH value is the cutaneous delayed hypersensitivity reaction to a recall antigen (usually mumps, Candida, or streptokinase-streptodornase): 0 if nonreactive, 1 if < 5 mm induration, 2 if >= 5 mm induration
Interpretation:
PNI
Risk
< 40
low risk
40 - 49.99
intermediate risk
>= 50
high risk
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