Table 4. Analysis of covariance of inverse normal transform (INT) of ferritin rank (A) and TSAT rank (B).
| A: Ferritin | ||
| Source | Type I Sum of Squares |
p-value |
| Corrected Model | 13.363 | .051 |
| Intercept | 8.856E-6 | .998 |
| Box Cox (Age) | 1.311 | .238 |
| Hemoglobin | 4.892 | .023 |
| Gender | .755 | .370 |
| CKD Stage | 1.870 | .370 |
| Gender * CKD Stage | 4.536 | .091 |
| Error | 215.089 | |
| Total | 228.452 | |
| Corrected Total | 228.452 | |
| B: TSAT | ||
| Corrected Model | 6.244 | .479 |
| Intercept | 8.366E-7 | .999 |
| Box Cox (Age) | 2.889 | .083 |
| Hemoglobin | 3.477E-7 | 1.000 |
| Gender | .216 | .634 |
| CKD Stage | .288 | .860 |
| Gender * CKD Stage | 2.850 | .227 |
| Error | 137.754 | |
| Total | 143.997 | |
| Corrected Total | 143.997 |
Type 1 SS was used to adjust for unequal sample sizes in a non-experimental design.