Distúrbios menstruais em adolescentes com transtornos alimentares - meta de percentil de índice de massa corporal para resolução dos distúrbios menstruais Menstruation disorders in adolescents with eating disorders - target body mass index percentiles for their resolution

ABSTRACT Objective: To analyse the progression of body mass index in eating disorders and to determine the percentile for establishment and resolution of the disease. Methods: A retrospective descriptive cross-sectional study. Review of clinical files of adolescents with eating disorders. Results: Of the 62 female adolescents studied with eating disorders, 51 presented with eating disorder not otherwise specified, 10 anorexia nervosa, and 1 bulimia nervosa. Twenty-one of these adolescents had menstrual disorders; in that, 14 secondary amenorrhea and 7 menstrual irregularities (6 eating disorder not otherwise specified, and 1 bulimia nervosa). In average, in anorectic adolescents, the initial body mass index was in 75thpercentile; secondary amenorrhea was established 1 month after onset of the disease; minimum weight was 76.6% of ideal body mass index (at 4thpercentile) at 10.2 months of disease; and resolution of amenorrhea occurred at 24 months, with average weight recovery of 93.4% of the ideal. In eating disorder not otherwise specified with menstrual disorder (n=10), the mean initial body mass index was at 85th percentile; minimal weight was in average 97.7% of the ideal value (minimum body mass index was in 52nd percentile) at 14.9 months of disease; body mass index stabilization occured at 1.6 year of disease; and mean body mass index was in 73rdpercentile. Considering eating disorder not otherwise specified with secondary amenorrhea (n=4); secondary amenorrhea occurred at 4 months, with resolution at 12 months of disease (mean 65thpercentile body mass index).