Bibliografia mullen: Buzby GP, Mullen JL, Matthews DC, et al. Prognostic nutritional index in gastrointestinal surgery. Am J Surg 1980;139:160-167.

IPN= 158 – (16.6 * Albúmina g/dl) – (0.78 * PTC mm) – (0.2 * transferrina mg/dl) – (5.8* tests cutáneos)