Table 1. Baseline characteristics of subjects.
N = 407 (209 girls, 198 boys). WBC, white blood cells.
| Mean |
5th and 95th percentiles |
|
| Age at enrolment (months) |
15.4 | 7.7, 22.2 |
| Length-for-age (z score) |
−1.00 | −2.45, 0.51 |
| Weight-for-age (z score) |
−1.19 | −2.67, 0.39 |
| Weight-for-height (z score) | −0.90 | −2.36, 0.54 |
| Hepcidin (ng/ml)* | 3.09 | 0.05, 39.05 |
| Hb (g/dl) | 9.78 | 7.30, 11.90 |
| Hematocrit (%) | 27.9 | 21.8, 34.1 |
| MCV (fl) | 62.8 | 50.2, 74.1 |
| MCHC (g/dl) | 35.1 | 32.7, 37.3 |
| WBC (×109 per liter) | 11.9 | 6.2, 19.7 |
| Granulocytes (×109 per liter) |
4.53 | 2.1, 8.0 |
| Lymphocytes (×109 per liter) |
6.32 | 3.17, 10.53 |
| Ferritin (μg/liter)* | 8.18 | 0.1, 62.2 |
| UIBC (μM) | 64.5 | 40.9, 92.8 |
| TSAT (%) | 7.87 | 0.80, 20.9 |
| sTfR (mg/liter) | 8.92 | 4.73, 15.06 |
| Serum iron (μM) | 5.70 | 0.7, 13.4 |
| CRP (mg/liter)* | 2.30 | 0.1, 24.5 |
| AGP (g/liter)* | 1.18 | 0.64, 2.23 |
| ID | ||
| Ferritin <15 μg/liter† | 50.9% | |
| Ferritin <15 μg/liter if CRP <5 mg/liter or ferritin <30 μg/liter if CRP >5 mg/liter |
58.5% | |
| sTfR >8.3 mg/liter | 45.7% | |
| Hepcidin <5.5 ng/ml | 49.1% | |
| IDA | ||
| MCV <63 fl‡ | 52.6 | |
| MCV <71 fl§ | 87.0 | |
*Geometric means.
†Defined as ferritin <15 μg/liter.
‡Defined as MCV <63 fl (lower limit for African Americans).
§Defined as MCV <71 fl (lower limit for Caucasian Americans).