Quiroz-Olguín G, et al. - In this cross-sectional and descriptive study, the researchers intended to assess several prediction equations (PEs) of the resting energy expenditure (REE) to identify the most accurate equation for estimating the REE required for parenteral nutrition (PN). This investigation involved patients hospitalised with medical or surgical diagnoses, making them candidates for PN. Determination of the REE should ideally be made by indirect calorimetry (IC) in hospitalised patients who receive PN. The study findings suggested that PEs were acceptable but not exact and so their estimation could overfeed or underfeed the patient.