Search

Background: Avoidant/restrictive food intake disorder (ARFID) may result in significant medical sequelae. Compared to youth with eating disorders like anorexia nervosa (AN), youth with ARFID tend to be younger and are more likely to be male. We aim to describe sex differences in clinical characteristics of youth hospitalized for medical complications of ARFID and compare their characteristics with youth hospitalized for anorexia nervosa., Methods: This is a retrospective review of electronic medical records for youth with ARFID (N = 36; 13 male and 23 female) and AN (N = 355; 40 male and 315 female), including restricting and binge-eating/purging subtypes, aged 9-25 admitted to the inpatient UCSF Eating Disorders Program (2012-2020)., Results: A greater proportion of youth with ARFID were male compared to youth with AN (36.1% vs. 11.2%). Male youth with ARFID (mean age 15.5 ± 2.8) had lower heart rate nadir (49.2 vs. 57.6 beats per minute, p = .019) and lower total cholesterol (129.8 vs. 159.3 mg/dL, p = .008), but higher hemoglobin (13.9 vs. 13.0 g/dL, p = .015) and prescribed calories at discharge (3323 vs. 2817 kcal, p = .001) compared to females with ARFID. Males with AN, who on average had higher admission BMI than males with ARFID (17.3 vs. 15.5 kg/m 2 , p = .013), required more (3785) kcal on discharge to restore medical stability than males with ARFID (3323 kcal). Compared to all youth with AN, youth with ARFID had lower body mass index (BMI, 15.7 vs. 17.0 kg/m 2 , p = .001) and lower vitamin D (26.5 vs. 33.0 ng/mL, p = .003)., Conclusions: ARFID in males is associated with lower heart rate nadirs than in females with ARFID. Clinicians should be aware of unique medical complications in youth with ARFID compared to youth with AN., Competing Interests: Declarations. Ethics approval and consent to participate: This retrospective chart review study involving human participants was in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The Institutional Review Board (IRB) of the University of California, San Francisco approved this study. This research study was conducted retrospectively from data obtained for clinical purposes. We consulted extensively with the IRB of the University of California, San Francisco who determined that our study did not need informed consent. Consent for publication: Not applicable. Competing interests: The authors declare no competing interests., (© 2024. The Author(s).)

Background: Refeeding syndrome is the gravest possible medical complication in malnourished patients undergoing refeeding in the hospital. We previously reported that males with malnutrition secondary to eating disorders required more calories and had longer hospital stays than females; however, sex differences in electrolyte abnormalities indicating refeeding syndrome risk remain unknown. The objective of this study was to assess differences in electrolyte abnormalities indicating refeeding syndrome risk among male and female adolescents and young adults with eating disorders hospitalized for medical instability., Methods: We retrospectively reviewed the electronic medical records of 558 patients aged 9-25 years admitted to the University of California, San Francisco Eating Disorders Program for medical instability between May 2012 and August 2020. Serum was drawn per standard of care between 5 and 7 am each morning and electrolyte abnormalities indicating refeeding syndrome risk were defined as: hypophosphatemia (< 3.0 mg/dL), hypokalemia (< 3.5 mEq/L), and hypomagnesemia (< 1.8 mg/dL). Logistic regression was used to assess factors associated with electrolyte abnormalities indicating refeeding syndrome risk., Results: Participants included 86 (15.4%) males and 472 (84.6%) females, mean (SD) age 15.5 (2.8) years. Rates of refeeding hypophosphatemia (3.5%), hypokalemia (8.1%), and hypomagnesemia (11.6%) in males hospitalized with eating disorders were low, with no statistically significant differences from females. Older age was associated with higher odds of refeeding hypophosphatemia and hypomagnesemia. Lower percent median body mass index and greater weight suppression at admission were associated with higher odds of refeeding hypophosphatemia., Conclusions: Rates of electrolyte abnormalities indicating refeeding syndrome risk were low in males hospitalized for eating disorders and rates did not significantly differ from females. Together with our finding that males have higher caloric requirements and longer hospital length of stay, the finding that electrolyte abnormalities indicating refeeding syndrome risk were not greater in males than females supports future research to evaluate the safety and efficacy of higher calorie and/or faster advancing refeeding protocols for males., (© 2024. The Author(s).)