Menstrual patterns among patients with Anorexia Nervosa and
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Few studies have examined menstrual differences between patients with anorexia nervosa (AN) versus avoidant/restrictive food intake disorder (ARFID).

After observing that many patients with ARFID maintain regular menses despite weight loss, researchers sought to characterize these menstrual differences in the context of specific eating behaviors.

Patients with AN or ARFID in a disordered eating database were included. Bivariate analyses explored group differences in demographics, age, percentage of median body mass index for age (%mBMI), time since last menstrual period (LMP), and reported eating behaviors, including whether self-reported diet history included “junk food” consumption in the past 24 hours. Regression analysis examined whether diagnosis and variables that were associated with diagnosis significantly predicted time since LMP. The analyses included 89 participants diagnosed with AN or ARFID.

- The AN group had a higher %mBMI for age than the ARFID group and was less likely to have reported consuming “junk food” the day prior.

- Time since LMP was longer for those with AN versus ARFID. A two-predictor model with diagnosis and “junk food” explained a significant proportion of variance in the time since LMP.

In addition to diagnosis, having no self-reported “junk food” consumption in the past 24 hours was significantly associated with a longer time since LMP.

Journal of Pediatric & Adolescent Gynecology
Source: https://doi.org/10.1016/j.jpag.2021.07.005
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