Indeed, I did have two cFTs. In February of this year, Dyna-Lab, another commercial lab in Ontario, and Life Labs, aforementioned, received vials of my blood, same needle stick. The reports came back indicating a five point difference. Each lab indicated that results had been obtained via calculation (though we don't know methodology). As my doctor said, "It's TRT, nothing should be assumed." She is always working to have a clearer understanding of the variables that influence decisions in clinical practice. She knows I'm as interested as she is. As a result, I'm part of a small group of her patients who willingly participate in as many hypothesis testing procedures as we can. In these, it was clear that the reliance on cFT values was a dicey procedure.
