How accurate are predictive formulas calculating energy expenditure in adolescent patients with anorexia nervosa?

Does Aggressive Refeeding in Hospitalized Adolescents With Anorexia Nervosa Result in Increased Hypophosphatemia?

“…Resting energy expenditure has been compared with indirect calorimetry and various predictive equations; however, these equations (e.g., Fleisch, Harris Benedict, FAO, Schofield-HW, Schedenbach) have generally overestimated the estimated energy requirements compared to the gold standard of indirect calorimetry [28].…”

Energy metabolism and body composition in long‐term recovery from anorexia nervosa

“…Our results suggest that there are no significant differences in REE, either crude or adjusted for LBM, between RAN and C women. Previous studies have reported that REE increases from AN to the refeeding period, 8,12,13,29,[57][58][59][60] as would be expected given that as refeeding and weight restoration occur, both LBM and FM increase, resulting in concomitant changes in REE. Yet, following weight restoration, REE has been found to be lower or similar to control participants.…”

“…In terms of REE, most studies have reported a lower REE for persons with AN compared with control groups, [7][8][9][10][12][13][14] but these studies either did not control for LBM or used the ratio of REE/LBM. One study that did adjust REE for LBM reported a lower REE in the group with acute AN compared with the control group, 11 but not in long-term recovery.…”

“…13 Yet, these studies did not control for LBM. [7][8][9][10][12][13][14] One study that did control for LBM still found REE to be lower in AN compared with control participants. 11 Low REE may predispose persons in recovery from AN to be at risk for depositing fat as weight restoration continues, yet limited data are available on body composition and body fat distribution for adults recovered from AN.…”

Nutrition Therapy for Eating Disorders

“…For patients with eating disorders, attempts to correlate energy requirements using equations typically used for determining energy expenditure in hospitalized patients and general populations have been unsuccessful. [64][65][66] Indirect calorimetry is the most accurate method for determining energy requirements in patients with AN and BN. 64,67,68 However, most clinicians do not use indirect calorimetry.…”