Ferritin threshold prevalence figure

Source: Tawfik YMK, Billingsley H, Bhatt AS, et al. Absolute and Functional
Iron Deficiency in the US, 2017–2020. JAMA Network Open. 2024;7(9):e2433126.
https://doi.org/10.1001/jamanetworkopen.2024.33126
https://pmc.ncbi.nlm.nih.gov/articles/PMC11423176/

Published estimates: Supplement 1, eTable 2, overall women/men columns.
Source article copyright © 2024 Tawfik YMK et al., distributed under CC BY:
https://creativecommons.org/licenses/by/4.0/

Empirical Health created this comparison from published numerical estimates;
it is not the paper's original figure. Dots show estimates; whiskers show
published 95% confidence intervals. All six age/sex groups are included.
Study cutoffs are strictly <15 and <30 ng/mL, not ASH's inclusive ≤ cutoffs.

Age labels: >18 to <50 years, 50–64 years (source ≥50 to <65), 65+ years.
Below <15 / below <30, percent (95% CI):
Women >18 to <50: 14 (12–17) / 34 (31–37)
Women 50–64: 4 (3–6) / 10 (8–13)
Women 65+: 2 (1–3) / 10 (8–12)
Men >18 to <50: 1 (0–2) / 3 (2–4)
Men 50–64: 1 (0–2) / 4 (2–5)
Men 65+: 1 (0–2) / 7 (5–10)

Additional headcounts retained in the research notes are Empirical calculations
from rounded published demographic shares and prevalence, not counts
reported by the authors or estimates of diagnoses in 2026.
Population represented: 244.6 million. Women 52%, men 48%.
Within-sex age shares: women 52%/26%/22%, men 54%/27%/19%.
Additional women (millions): 244.6 × .52 × (.52×.20 + .26×.06 + .22×.08) ≈ 17.
Additional men (millions): 244.6 × .48 × (.54×.02 + .27×.03 + .19×.06) ≈ 4.
Rounding limits accuracy. No confidence interval is calculated for these
derived headcounts. This is not an exact implementation of all ASH criteria.

PREFER fatigue outcomes (Figure 2, panels A and B)

Favrat B, Balck K, Breymann C, et al. Evaluation of a Single Dose of Ferric
Carboxymaltose in Fatigued, Iron-Deficient Women – PREFER a Randomized,
Placebo-Controlled Study. PLOS ONE. 2014;9(4):e94217.
https://doi.org/10.1371/journal.pone.0094217
Original Figure 2: https://doi.org/10.1371/journal.pone.0094217.g002
Copyright © 2014 Favrat et al.
License: CC BY 4.0 https://creativecommons.org/licenses/by/4.0/
Adaptation: only the top two panels (A and B) are displayed; panels C and D
are omitted. Original labels, colors, data, and error bars are unchanged.
The SVG viewport displays the original published raster without redrawing.
Panel B error bars show standard deviations, not confidence intervals.