Table II.
Mean values at enrollment for variables used in the computation of RBC iron, storage iron, and TBI for 555 subjects included in longitudinal regression analysis.
| No Pills | Placebo | 19mg | 38mg | Total | |
|---|---|---|---|---|---|
|
| |||||
| N (% female) | 139 (49.6%) | 138 (49.3%) | 139 (48.9%) | 139 (49.6%) | 555 (49.4%) |
| Body Size, mean (SD) | |||||
| Height, inches | 67.6 (3.9) | 67.2 (3.4) | 67.9 (3.6) | 67.3 (3.7) | |
| Weight, pounds | 182.1 (44.6) | 179.1 (47.1) | 184.4 (46.1) | 182.4 (49.1) | |
| Estimated Blood Volume, L1 | 4.96 (0.93) | 4.91 (0.89) | 5.05 (0.85) | 4.98 (0.96) | |
| Venous Hemoglobin, g/dL | 13.95 (1.33) | 14.10 (1.36) | 13.89 (1.24) | 14.00 (1.39) | |
| RBC Iron, mg | 2148 (533) | 2155 (528) | 2178 (467) | 2168 (540) | |
|
| |||||
| Ferritin, ng/mL | 29.4 (28.2) | 25.9 (20.6) | 23.6 (25.9) | 27.0 (29.2) | |
| sTfR, mg/L | 3.57 (1.34) | 3.53 (1.31) | 3.60 (1.19) | 4.11 (5.34) | |
| log (sTfR/ferritin) | 2.21 (0.47) | 2.22 (0.41) | 2.30 (0.41) | 2.27 (0.44) | |
| Storage Iron, mg | 426 (382) | 422 (319) | 361 (309) | 394 (353) | |
|
| |||||
| Total Body Iron, mg | 2572 (808) | 2575 (754) | 2547 (678) | 2570 (795) | |
|
| |||||
| RBC Iron/TBI | 85.7% (11.2) | 85.3% (9.7) | 87.2% (9.8) | 86.4% (10.4) | |
| Storage Iron/TBI | 14.3% (11.2) | 14.7% (9.7) | 12.8% (9.8) | 13.6% (10.4) | |
1
estimated blood volume computed using formula from Nadler, et al. 1962.