Functional hypothalamic amenorrhoea characteristics.
The mean age of 100 women with FHA was 27.7 ± 6.25; 14 of those had suspected concomitant PCOS. The average duration of menstrual disturbance in 80 patients was 2.98 ± 3.24 years. Exercise history was recorded in 81 women with FHA; 76 (94%) exercised regularly. There was a history of eating disorder in 52.5% of those with available ED data. Of those reporting no history of ED, 9 reported dietary restrictions, with 4 practicing veganism and 1 case each of lactose intolerance, low FODMAP diet, gluten-free diet, intermittent fasting and pescatarianism. Psychological stress was reported by the majority 59/65 (91%) of women with FHA. Occupation data was available for 60 women with FHA; when categorised according to the ISCO-08 structure, the majority had high ranking occupations. Further details about the characteristics of women with FHA are summarised in supporting table S1.