Table 3.
Serum ferritin (SF) status by hemoglobin level among females with no history of past-year blood donation, stratified by race/ethnicity. National Health and Nutrition Examination Survey, 1999–2010 (n=6937).
| Hemoglobin (g/dL) |
||||||||
|---|---|---|---|---|---|---|---|---|
| <11.0 | 11.0–11.4 | 11.5–11.9 | 12.0–12.4 | 12.5–12.9 | 13.0–13.4 | 13.5–13.9 | ≥14.0 | |
| Non-Hispanic White | ||||||||
| Na | 37 | 27 | 53 | 129 | 321 | 457 | 658 | 1201 |
| Geometric mean SFb | 6.1 (3.3–11.2) | 12.9 (5.3–31.8) | 15.1 (10.8–21.2) | 26.2 (21.9–31.2) | 33.6 (29.9–37.7) | 43.0 (40.0–46.2) | 48.6 (45.7–51.6) | 58.8 (56.5–61.2) |
| Prevalence SF <12ng/mlc | 88.1 (42.8–99.9)d | 58.4 (13.2–94.5)d | 51.1 (34.4–67.5) | 21.0 (13.4–30.6) | 15.8 (11.3–21.3) | 8.3 (5.9–11.3) | 4.5 (2.9–6.6) | 1.2 (0.7–2.0) |
| Prevalence SF <26ng/mlc | 93.0 (54.5–100.0)d | 77.5 (26.1–99.2)d | 64.5 (45.5–80.6)d | 49.5 (39.0–60.0) | 34.3 (29.0–39.9) | 26.9 (22.7–31.3) | 18.4 (15.3–21.7) | 12.1 (10.3–14.2) |
| Non-Hispanic Black | ||||||||
| Na | 145 | 94 | 144 | 261 | 349 | 270 | 229 | 187 |
| Geometric mean SFb | 12.2 (9.5–15.7) | 20.3 (15.1–27.3) | 31.6 (27.1–36.8) | 39.1 (34.5–44.3) | 44.3 (38.8–50.6) | 47.1 (42.4–52.3) | 60.4 (52.7–69.2) | 67.8 (59.9–76.7) |
| Prevalence SF <12ng/mlc | 64.7 (54.9–73.7) | 36.3 (25.3–48.4) | 17.2 (11.2–24.8) | 12.0 (8.2–16.8) | 9.0 (5.5–13.7) | 3.2 (1.3–6.2)d | 2.8 (0.8–6.8)d | 2.1 (0.4–5.8)d |
| Prevalence SF <26ng/mlc | 77.9 (68.2–85.8) | 61.7 (46.5–75.3) | 45.6 (36.8–54.5) | 36.5 (30.3–43.1) | 29.0 (23.6–34.8) | 21.6 (16.2–27.8) | 14.0 (8.4–21.5) | 11.0 (6.7–16.7) |
| Hispanic | ||||||||
| Na | 92 | 55 | 76 | 203 | 365 | 421 | 509 | 654 |
| Geometric mean SFb | 5.7 (5.0–6.6) | 11.9 (7.9–17.8) | 19.8 (12.5–31.1) | 23.1 (20.0–26.7) | 30.4 (26.9–34.4) | 38.1 (34.3–42.2) | 44.4 (40.4–48.8) | 56.1 (51.7–60.9) |
| Prevalence SF <12ng/mlc | 90.6 (82.0–96.0) | 66.4 (45.2–83.7)d | 40.8 (25.4–57.7)d | 23.2 (17.4–30.0) | 15.5 (11.1–20.7) | 8.1 (5.0–12.3) | 3.5 (2.0–5.6) | 1.0 (0.4–2.2)d |
| Prevalence SF <26ng/mlc | 95.4 (88.3–98.8) | 83.6 (62.8–95.4) | 62.1 (40.8–80.5)d | 54.6 (46.2–62.8) | 39.6 (33.1–46.3) | 27.5 (22.0–33.7) | 24.0 (19.2–29.3) | 13.6 (9.8–18.1) |
a
Unweighted sample sizes.
b
Survey-weighted means and 95% confidence intervals (CI).
c
Survey-weighted proportions with Korn-Graubard 95% CI.
d
Residual squared error >30% and/or estimate fails to meet one or more criteria for NCHS presentation standards and should be interpreted with caution.