The serum ferritin would be the other value tested. Often, TIBC is also done. I feel the TIBC is more relevant because it shows if your body is trying to absorb more iron. While your values are low normal, they are within range. it's hard to say it's iron deficiency with these values. If any of the other tests were done, those results might bring a little more clarity, but for the record, these numbers seem typical for thal minors.