Demographics and personal HAIR calculations for the 50 dietary study participants.

General, dietary intake and nosebleed demographics and derivatives, calculated from the FFQ (Table S1) and raw data for nosebleeds (see Figure 2). RDA, recommended dietary allowance (8 mg for males and post-menopausal females, 18 mg for non pregnant pre-menopausal females); 95% CI, 95% confidence intervals; ESS, epistaxis severity score, where number refers to ESS question number. [50] *The final ESS score ranges from 0–10, where a higher score equates to greater blood losses. Dietary iron intake was no higher in pre-menopausal females (Kruskal Wallis p value 0.22), none of the pre-menopausal females achieved their recommended iron intake, and the difference in the proportion of pre-menopausal females and males/postmenopausal females meeting their RDA was statistically significant (p<0.001, Mann Whitney). Male gender weakly correlated with a higher dietary iron intake, but once corrected for gender, individuals with longer nosebleeds tended to have higher dietary iron intakes (data not shown).